SlideShare ist ein Scribd-Unternehmen logo
1 von 37
Anatomy of Larynx
Dr Utkal Mishra
PG (ENT)
VSS MEDICAL COLLEGE, BURLA
Introduction
 Larynx (voice box) is situated in front of hypopharynx
opposite 3rd to 6th cervical vertebra
 It extends from Laryngeal inlet to Inferior border of
cricoid cartilage.
 Primary function of larynx is protection of lower airway
from food particles and secretion of oropharynx.
Embryology
 Larynx develops from - Cranial part of Laryngotracheal
groove (Ventral aspect of foregut) during 4th wk of
IUL.
 Most of the anatomical characteristics of larynx develop
by the 3rd month of fetal life.
 The larynx descends in the neck to achieve its final position
at vertebrae C3-C6 by age - 6 years.
Development of laryngeal cartilages
Name of the cartilage Developed from
 Thyroid cartilage Upper part- 4th arch
Lower part – 6th arch
 Epiglottis Hypobranchial eminence
 Arytenoids 6th arch cartilage
 Corniculate 6th arch cartilage
 Cricoid 6th arch cartilage
Laryngeal Framework
 Laryngeal Cartilages
 Laryngeal Joints
 Laryngeal Ligaments & Membranes.
 Laryngeal Muscles
 Cavity of Larynx
Laryngeal Cartilages
 9 in no.
 3 unpaired – Thyroid
Cricoid
Epiglottis
 3 paired – Arytenoid
Corniculate
Cuneiform
Thyroid Cartilage
Superior
tubercle
Thyroid
Notch
Oblique Line
Cricoid Cartilage
Epiglottis
Arytenoid Cartilage
Corniculate & Cuneiform
Laryngeal Joints
 2 in no.
 Cricoarytenoid joint
 Cricothyroid joint
Cricoarytenoid joint
Cricothyroid joint
Laryngeal Ligaments & Membranes
 Extrinsic - Thyrohyoid Membrane
Cricotracheal Membrane
Hyoepiglottic Membrane
 Intrinsic - Cricovocal Membrane
Quadrangular Membrane
Cricothyroid Ligament
Thyroepiglottic Ligament
Extrinsic Ligaments
Cricovocal & Quadrangular Membrane
Muscles of Larynx
INTRINSIC MUSCLES -
 Acting on Vocal cords –
Only Abductor - Postr. Cricoarytenoid
Adductors - Lateral Cricoarytenoid
Interarytenoid (Transv.)
Thyroarytenoid
Tensors - Cricothyroid
Vocalis
 Acting on Laryngeal Inlet –
Openers - Thyroepiglottic
Closers - Aryepiglottic
Interarytenoid (oblique)
EXTRINSIC MUSCLES –
Elevators- Stylopharyngeus Depressors- Sternohyoid
Salpingopharyngeous Sternothyroid
Palatopharyngeous Omohyoid
Thyrohyoid
Postr. Cricoarytenoid M.
 Only abductor of vocal cord
 Origin- Posterior surface of cricoid lamina
 Insertion- Muscular process of arytenoid
 Action- vocal cord abduction
 Nerve - RLN
Latr. Cricoarytenoid M.
 Origin- Superior border of lateral part of
the arch of the cricoid cartilage
 Insertion- Muscular process of arytenoid
 Action- Vocal cord adduction
 Nerve - RLN
Interarytenoid M.
 Oblique/ transverse part
 Adducts the vocal cord
 Oblique part continues as
aryepiglotticus
 Aryepiglotticus have a
sphincter action on AE fold
during swallowing
Thyroarytenoid M.
 Origin- Angle of thyroid cartilage
 Insertion- Anterolatr. surface of arytenoids
 Action- Drags arytenoid forward
 Adducter of vocal cord
 Internal part of Thyroarytnoid M. - Vocalis
Cricothyroid M.
 Tensor of vocal cord
 Origin- Cricoid arch
 Insertion- Infr. border thyroid cartilage
 Action- Tilts thyroid forward & cricoid
backward -stretches vocal cord
 Makes vocal cord thinner & longer - ↑ pitch
 Nerve - External branch of SLN
Cavity of Larynx
 It starts from Layngeal Inlet &
ends at lower border of cricoid cartilage.
 Divided into 3 parts by vestibular & vocal folds
1. Vestibule
2. Ventricle
3. Subglottis
Cavity of Larynx (cont.)
 Vestibule – Extends from laryngeal inlet to
vestibular folds
Antr. wall - Postr. surface of
Epiglottis
Latr. Wall – Aryepiglottic folds
Postr. Wall – Arytenoids
 Ventricles – Space between vestibular & vocal
folds
- Extends above to form Saccule
- Mucous glands in saccule
lubricates vocal cords
 Subglottis – Extends from vocal cords to
lower border of cricoid.
Glottis
 Elongated space between vocal cords anteriorly & vocal process
& base of arytenoids posteriorly.
 Anteroposteriorly - 24mm in male & 16 mm in female.
 Anterior 3/5th - Membranous (Phonatory glottis)
 Posterior 2/5th - Cartilagenous (Respiratory glottis)
Vocal Cords
Histologicaly the vocal
cord contains 5 layers
1. Epithelial layer
2. Superficial LP
3. Intermediate LP
4. Deep LP
5. Vocalis Muscle
Mucous Membrane of Larynx
 Pseudo stratified ciliated columnar epithelium
 Except - Upper ½ of postr. Surface of Epiglottis
Upper part of Aryepiglottic fold
Postr. Glottis
Vocal Cords
which are covered by – Nonkeratinizing Stratified
Squamous Epithelium
Spaces within Larynx
 3 in no.
 Preepiglottic Space of Boyer
 Paraglottic Space
 Rienke’s Space
Pre-epiglottic Space of Boyer
 Boundary -
Antr.ly – Thyrohyoid Membrane
Hyoid bone
Postr.ly- Epiglottis
Supr.ly – Hyoepiglottic Ligament
 Contents – Fat, Areolar tissue ,
Lymphatics
 It is continous laterally with
Paraglottic space.
Paraglottic Space
 Bounded
 Laterally – Thyroid Cartilage
 Medially – Conus Elasticus
- Quadrangular
Membrane
 Posteriorly – Mucosa of
Pyriform Fossa
It encompasses the laryngeal
ventricle & saccule
Paraglottic
Space
Rienkes Space
 It is the space underlying
Epithelium of vocal cords
 Bounded
 Above & Below – Arcuate
Lines
 In front - Anterior
Comissure
 Behind – Vocal process of
Arytenoid
Nerve Supply Of Larynx
 Motor –
 All Intrinsic M. – Rec. Laryngeal N.
 Except Cricothyroid – Extn. Br. Of
Supr. Laryngeal N.
 Sensory –
 Above Vocal Cords – Internal Br. Of
Supr. Laryngeal N.
 Below Vocal Cords – Rec. Laryngeal N.
 Rec. Laryngeal N. arises from trunk
of Vagus.
 Supr. Laryngeal N. arises from
Inferior Ganglion of Vagus.
Laryngeal Vasculature
Lymphatic Drainage
 The part of the larynx above the vocal folds is drained by vessels
accompanying the superior laryngeal vein to UPPER DEEP
CERVICAL NODES
 Below the vocal folds drains with the inferior vein, into
PRE-LARYNGEAL and PRE-TRACHEAL nodes.
 The vocal folds are devoid of lymphatics. (Water- Shed zone)
Paediatric Larynx
 Positioned high in neck – C3 - C4
 Cartilages soft & collapsible
 Submucosal tissue are loose
 Small & Conical
 Narrowest portion is subglottis
Anatomy of Larynx Dr Utkal Mishra

Weitere ähnliche Inhalte

Was ist angesagt?

Larynx anatomy of larynx (1)
Larynx anatomy of larynx (1)Larynx anatomy of larynx (1)
Larynx anatomy of larynx (1)KGMU, Lucknow
 
E.N.T.Anatomy and physiology of larynx.(dr.usif chalabe)
E.N.T.Anatomy and physiology of  larynx.(dr.usif chalabe)E.N.T.Anatomy and physiology of  larynx.(dr.usif chalabe)
E.N.T.Anatomy and physiology of larynx.(dr.usif chalabe)student
 
Anatomy of larynx
Anatomy of larynxAnatomy of larynx
Anatomy of larynxJinu Iype
 
anatomy of larynx by ravindra daggupati
anatomy of larynx by ravindra daggupatianatomy of larynx by ravindra daggupati
anatomy of larynx by ravindra daggupatiRavindra Daggupati
 
Anatomy & physiology of larynx
Anatomy & physiology of larynxAnatomy & physiology of larynx
Anatomy & physiology of larynxDr. Pruthvi Raj S
 
Pterygopalatine fossa and approaches by Dr.Ashwin Menon
Pterygopalatine fossa and approaches by Dr.Ashwin MenonPterygopalatine fossa and approaches by Dr.Ashwin Menon
Pterygopalatine fossa and approaches by Dr.Ashwin MenonDr.Ashwin Menon
 
Anatomy of larynx
Anatomy of larynxAnatomy of larynx
Anatomy of larynxVIJAI KUMAR
 
Anatomy of nasopharynx
Anatomy  of  nasopharynxAnatomy  of  nasopharynx
Anatomy of nasopharynxSwarnita Sahu
 

Was ist angesagt? (20)

Larynx anatomy of larynx (1)
Larynx anatomy of larynx (1)Larynx anatomy of larynx (1)
Larynx anatomy of larynx (1)
 
Anatomy of the larynx
Anatomy of the larynxAnatomy of the larynx
Anatomy of the larynx
 
Anatomy of larynx
Anatomy of larynx Anatomy of larynx
Anatomy of larynx
 
Laryngeal Muscles
Laryngeal MusclesLaryngeal Muscles
Laryngeal Muscles
 
E.N.T.Anatomy and physiology of larynx.(dr.usif chalabe)
E.N.T.Anatomy and physiology of  larynx.(dr.usif chalabe)E.N.T.Anatomy and physiology of  larynx.(dr.usif chalabe)
E.N.T.Anatomy and physiology of larynx.(dr.usif chalabe)
 
Anatomy of larynx
Anatomy of larynxAnatomy of larynx
Anatomy of larynx
 
anatomy of larynx by ravindra daggupati
anatomy of larynx by ravindra daggupatianatomy of larynx by ravindra daggupati
anatomy of larynx by ravindra daggupati
 
Pterygopalatine fossa
Pterygopalatine  fossaPterygopalatine  fossa
Pterygopalatine fossa
 
Anatomy & physiology of larynx
Anatomy & physiology of larynxAnatomy & physiology of larynx
Anatomy & physiology of larynx
 
Pterygopalatine fossa and approaches by Dr.Ashwin Menon
Pterygopalatine fossa and approaches by Dr.Ashwin MenonPterygopalatine fossa and approaches by Dr.Ashwin Menon
Pterygopalatine fossa and approaches by Dr.Ashwin Menon
 
E.N.T 5th year, 1st lecture (Dr. Hiwa)
E.N.T 5th year, 1st lecture (Dr. Hiwa)E.N.T 5th year, 1st lecture (Dr. Hiwa)
E.N.T 5th year, 1st lecture (Dr. Hiwa)
 
Anatomy of larynx
Anatomy of larynxAnatomy of larynx
Anatomy of larynx
 
Ppt larynx.
Ppt larynx.Ppt larynx.
Ppt larynx.
 
Larynx anatomy
Larynx anatomyLarynx anatomy
Larynx anatomy
 
Anatomy of Larynx Prof.Dr.N.Mugunthan
Anatomy of Larynx   Prof.Dr.N.MugunthanAnatomy of Larynx   Prof.Dr.N.Mugunthan
Anatomy of Larynx Prof.Dr.N.Mugunthan
 
Anatomy of larynx
Anatomy of larynxAnatomy of larynx
Anatomy of larynx
 
Anatomy of pharynx
Anatomy of pharynxAnatomy of pharynx
Anatomy of pharynx
 
Anatomy of larynx
Anatomy of larynxAnatomy of larynx
Anatomy of larynx
 
Anatomy of infratemporal region
Anatomy of infratemporal regionAnatomy of infratemporal region
Anatomy of infratemporal region
 
Anatomy of nasopharynx
Anatomy  of  nasopharynxAnatomy  of  nasopharynx
Anatomy of nasopharynx
 

Ähnlich wie Anatomy of Larynx Dr Utkal Mishra

Anatomy and Physiology of larynx.pptx
Anatomy and Physiology of larynx.pptxAnatomy and Physiology of larynx.pptx
Anatomy and Physiology of larynx.pptxDevakantaSingh1
 
Anatomy of larynx and its anaesthetic importance
Anatomy of larynx and its anaesthetic importanceAnatomy of larynx and its anaesthetic importance
Anatomy of larynx and its anaesthetic importanceDhritiman Chakrabarti
 
anatomy of larynx with tumor barriers
anatomy of larynx with tumor barriersanatomy of larynx with tumor barriers
anatomy of larynx with tumor barriersDrDeepa Grover
 
Anatomyofpharynx 120310220054-phpapp02
Anatomyofpharynx 120310220054-phpapp02Anatomyofpharynx 120310220054-phpapp02
Anatomyofpharynx 120310220054-phpapp02athulpaul4
 
Anatomy of Larynx by Kanato.T. Assumi
Anatomy of Larynx by Kanato.T. AssumiAnatomy of Larynx by Kanato.T. Assumi
Anatomy of Larynx by Kanato.T. AssumiKanato Assumi
 
Anatomy of larynx.pptx
Anatomy of larynx.pptxAnatomy of larynx.pptx
Anatomy of larynx.pptxKalai Selvie
 
ANATOMY OF LARYNX.pptx
ANATOMY OF LARYNX.pptxANATOMY OF LARYNX.pptx
ANATOMY OF LARYNX.pptxiyaswanthsai
 
larynx
larynxlarynx
larynxJysri9
 
Anatomy of larynx & physiology, 29.08.16, dr.bakshi
Anatomy of larynx & physiology, 29.08.16, dr.bakshiAnatomy of larynx & physiology, 29.08.16, dr.bakshi
Anatomy of larynx & physiology, 29.08.16, dr.bakshiophthalmgmcri
 
11. anatomy and physiology of larynx
11. anatomy and physiology of larynx11. anatomy and physiology of larynx
11. anatomy and physiology of larynxkrishnakoirala4
 
Anatomy and physiology of larynx
Anatomy and physiology of larynxAnatomy and physiology of larynx
Anatomy and physiology of larynxDr Krishna Koirala
 
Anatomy of larynx
Anatomy of larynxAnatomy of larynx
Anatomy of larynxranjit9124
 
E.N.T.Embryology & anatomy.(dr.mwaed)
E.N.T.Embryology & anatomy.(dr.mwaed)E.N.T.Embryology & anatomy.(dr.mwaed)
E.N.T.Embryology & anatomy.(dr.mwaed)student
 

Ähnlich wie Anatomy of Larynx Dr Utkal Mishra (20)

Anatomy and Physiology of larynx.pptx
Anatomy and Physiology of larynx.pptxAnatomy and Physiology of larynx.pptx
Anatomy and Physiology of larynx.pptx
 
Anatomy of larynx and its anaesthetic importance
Anatomy of larynx and its anaesthetic importanceAnatomy of larynx and its anaesthetic importance
Anatomy of larynx and its anaesthetic importance
 
Phonosurgery
PhonosurgeryPhonosurgery
Phonosurgery
 
anatomy of larynx with tumor barriers
anatomy of larynx with tumor barriersanatomy of larynx with tumor barriers
anatomy of larynx with tumor barriers
 
Larynx
Larynx  Larynx
Larynx
 
Anatomy of larynx
Anatomy of larynxAnatomy of larynx
Anatomy of larynx
 
Anatomy of larynx ppt
Anatomy of larynx ppt Anatomy of larynx ppt
Anatomy of larynx ppt
 
Anatomyofpharynx 120310220054-phpapp02
Anatomyofpharynx 120310220054-phpapp02Anatomyofpharynx 120310220054-phpapp02
Anatomyofpharynx 120310220054-phpapp02
 
Anatomy of Larynx by Kanato.T. Assumi
Anatomy of Larynx by Kanato.T. AssumiAnatomy of Larynx by Kanato.T. Assumi
Anatomy of Larynx by Kanato.T. Assumi
 
larynx anatomy.pptx
larynx anatomy.pptxlarynx anatomy.pptx
larynx anatomy.pptx
 
Larynx.ppt
Larynx.pptLarynx.ppt
Larynx.ppt
 
Anatomy of larynx.pptx
Anatomy of larynx.pptxAnatomy of larynx.pptx
Anatomy of larynx.pptx
 
ANATOMY OF LARYNX.pptx
ANATOMY OF LARYNX.pptxANATOMY OF LARYNX.pptx
ANATOMY OF LARYNX.pptx
 
larynx
larynxlarynx
larynx
 
Anatomy of larynx & physiology, 29.08.16, dr.bakshi
Anatomy of larynx & physiology, 29.08.16, dr.bakshiAnatomy of larynx & physiology, 29.08.16, dr.bakshi
Anatomy of larynx & physiology, 29.08.16, dr.bakshi
 
11. anatomy and physiology of larynx
11. anatomy and physiology of larynx11. anatomy and physiology of larynx
11. anatomy and physiology of larynx
 
Anatomy and physiology of larynx
Anatomy and physiology of larynxAnatomy and physiology of larynx
Anatomy and physiology of larynx
 
Anatomy of larynx
Anatomy of larynxAnatomy of larynx
Anatomy of larynx
 
Larynx
LarynxLarynx
Larynx
 
E.N.T.Embryology & anatomy.(dr.mwaed)
E.N.T.Embryology & anatomy.(dr.mwaed)E.N.T.Embryology & anatomy.(dr.mwaed)
E.N.T.Embryology & anatomy.(dr.mwaed)
 

Mehr von Dr Utkal Mishra

Head and Neck Cancer Quiz.pptx
Head and Neck Cancer Quiz.pptxHead and Neck Cancer Quiz.pptx
Head and Neck Cancer Quiz.pptxDr Utkal Mishra
 
Diseases of external ear Dr Utkal Mishra
Diseases of external ear Dr Utkal MishraDiseases of external ear Dr Utkal Mishra
Diseases of external ear Dr Utkal MishraDr Utkal Mishra
 
Salivary gland and its disorders Dr Utkal Mishra
Salivary gland and its disorders Dr Utkal MishraSalivary gland and its disorders Dr Utkal Mishra
Salivary gland and its disorders Dr Utkal MishraDr Utkal Mishra
 
Head and neck cancer staging
Head and neck cancer stagingHead and neck cancer staging
Head and neck cancer stagingDr Utkal Mishra
 
Medicolegal aspects of head and neck endocrine surgery
Medicolegal aspects of head and neck endocrine surgeryMedicolegal aspects of head and neck endocrine surgery
Medicolegal aspects of head and neck endocrine surgeryDr Utkal Mishra
 
JUVENILE NASOPHARYNGEAL ANGIOFIBROMA Surgical approaches & Newer treatment o...
JUVENILE NASOPHARYNGEAL ANGIOFIBROMA  Surgical approaches & Newer treatment o...JUVENILE NASOPHARYNGEAL ANGIOFIBROMA  Surgical approaches & Newer treatment o...
JUVENILE NASOPHARYNGEAL ANGIOFIBROMA Surgical approaches & Newer treatment o...Dr Utkal Mishra
 
Case presentation Esthesioneuroblastoma Dr Utkal Mishra
Case presentation Esthesioneuroblastoma Dr Utkal MishraCase presentation Esthesioneuroblastoma Dr Utkal Mishra
Case presentation Esthesioneuroblastoma Dr Utkal MishraDr Utkal Mishra
 
Maxillectomy & Rehabilitation
Maxillectomy & RehabilitationMaxillectomy & Rehabilitation
Maxillectomy & RehabilitationDr Utkal Mishra
 
Cochlear implantation dr utkal
Cochlear implantation dr utkalCochlear implantation dr utkal
Cochlear implantation dr utkalDr Utkal Mishra
 
Mechanism of balance & vestibular function test Dr Utkal Mishra
Mechanism of balance & vestibular function test Dr Utkal MishraMechanism of balance & vestibular function test Dr Utkal Mishra
Mechanism of balance & vestibular function test Dr Utkal MishraDr Utkal Mishra
 
Anatomy of Neck spaces & Infections
Anatomy of Neck spaces & InfectionsAnatomy of Neck spaces & Infections
Anatomy of Neck spaces & InfectionsDr Utkal Mishra
 

Mehr von Dr Utkal Mishra (12)

Head and Neck Cancer Quiz.pptx
Head and Neck Cancer Quiz.pptxHead and Neck Cancer Quiz.pptx
Head and Neck Cancer Quiz.pptx
 
Diseases of external ear Dr Utkal Mishra
Diseases of external ear Dr Utkal MishraDiseases of external ear Dr Utkal Mishra
Diseases of external ear Dr Utkal Mishra
 
Salivary gland and its disorders Dr Utkal Mishra
Salivary gland and its disorders Dr Utkal MishraSalivary gland and its disorders Dr Utkal Mishra
Salivary gland and its disorders Dr Utkal Mishra
 
Head and neck cancer staging
Head and neck cancer stagingHead and neck cancer staging
Head and neck cancer staging
 
Medicolegal aspects of head and neck endocrine surgery
Medicolegal aspects of head and neck endocrine surgeryMedicolegal aspects of head and neck endocrine surgery
Medicolegal aspects of head and neck endocrine surgery
 
JUVENILE NASOPHARYNGEAL ANGIOFIBROMA Surgical approaches & Newer treatment o...
JUVENILE NASOPHARYNGEAL ANGIOFIBROMA  Surgical approaches & Newer treatment o...JUVENILE NASOPHARYNGEAL ANGIOFIBROMA  Surgical approaches & Newer treatment o...
JUVENILE NASOPHARYNGEAL ANGIOFIBROMA Surgical approaches & Newer treatment o...
 
Case presentation Esthesioneuroblastoma Dr Utkal Mishra
Case presentation Esthesioneuroblastoma Dr Utkal MishraCase presentation Esthesioneuroblastoma Dr Utkal Mishra
Case presentation Esthesioneuroblastoma Dr Utkal Mishra
 
Maxillectomy & Rehabilitation
Maxillectomy & RehabilitationMaxillectomy & Rehabilitation
Maxillectomy & Rehabilitation
 
Cochlear implantation dr utkal
Cochlear implantation dr utkalCochlear implantation dr utkal
Cochlear implantation dr utkal
 
Hearing loss
Hearing lossHearing loss
Hearing loss
 
Mechanism of balance & vestibular function test Dr Utkal Mishra
Mechanism of balance & vestibular function test Dr Utkal MishraMechanism of balance & vestibular function test Dr Utkal Mishra
Mechanism of balance & vestibular function test Dr Utkal Mishra
 
Anatomy of Neck spaces & Infections
Anatomy of Neck spaces & InfectionsAnatomy of Neck spaces & Infections
Anatomy of Neck spaces & Infections
 

Kürzlich hochgeladen

power point presentation of Clinical evaluation of strabismus
power point presentation of Clinical evaluation  of strabismuspower point presentation of Clinical evaluation  of strabismus
power point presentation of Clinical evaluation of strabismusChandrasekar Reddy
 
Female Reproductive Physiology Before Pregnancy
Female Reproductive Physiology Before PregnancyFemale Reproductive Physiology Before Pregnancy
Female Reproductive Physiology Before PregnancyMedicoseAcademics
 
SGK RỐI LOẠN TOAN KIỀM ĐHYHN RẤT HAY VÀ ĐẶC SẮC.pdf
SGK RỐI LOẠN TOAN KIỀM ĐHYHN RẤT HAY VÀ ĐẶC SẮC.pdfSGK RỐI LOẠN TOAN KIỀM ĐHYHN RẤT HAY VÀ ĐẶC SẮC.pdf
SGK RỐI LOẠN TOAN KIỀM ĐHYHN RẤT HAY VÀ ĐẶC SẮC.pdfHongBiThi1
 
"Radical excision of DIE in subferile women with deep infiltrating endometrio...
"Radical excision of DIE in subferile women with deep infiltrating endometrio..."Radical excision of DIE in subferile women with deep infiltrating endometrio...
"Radical excision of DIE in subferile women with deep infiltrating endometrio...Sujoy Dasgupta
 
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdf
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdfSGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdf
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdfHongBiThi1
 
DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptx
DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptxDNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptx
DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptxMAsifAhmad
 
Neurological history taking (2024) .
Neurological  history  taking  (2024)  .Neurological  history  taking  (2024)  .
Neurological history taking (2024) .Mohamed Rizk Khodair
 
Red Blood Cells_anemia & polycythemia.pdf
Red Blood Cells_anemia & polycythemia.pdfRed Blood Cells_anemia & polycythemia.pdf
Red Blood Cells_anemia & polycythemia.pdfMedicoseAcademics
 
FDMA FLAP - The first dorsal metacarpal artery (FDMA) flap is used mainly for...
FDMA FLAP - The first dorsal metacarpal artery (FDMA) flap is used mainly for...FDMA FLAP - The first dorsal metacarpal artery (FDMA) flap is used mainly for...
FDMA FLAP - The first dorsal metacarpal artery (FDMA) flap is used mainly for...Shubhanshu Gaurav
 
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdf
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdfSGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdf
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdfHongBiThi1
 
blood bank management system project report
blood bank management system project reportblood bank management system project report
blood bank management system project reportNARMADAPETROLEUMGAS
 
ORAL HYPOGLYCAEMIC AGENTS - PART 2.pptx
ORAL HYPOGLYCAEMIC AGENTS  - PART 2.pptxORAL HYPOGLYCAEMIC AGENTS  - PART 2.pptx
ORAL HYPOGLYCAEMIC AGENTS - PART 2.pptxNIKITA BHUTE
 
MedMatch: Your Health, Our Mission. Pitch deck.
MedMatch: Your Health, Our Mission. Pitch deck.MedMatch: Your Health, Our Mission. Pitch deck.
MedMatch: Your Health, Our Mission. Pitch deck.whalesdesign
 
How to cure cirrhosis and chronic hepatitis naturally
How to cure cirrhosis and chronic hepatitis naturallyHow to cure cirrhosis and chronic hepatitis naturally
How to cure cirrhosis and chronic hepatitis naturallyZurück zum Ursprung
 
Clinical Research Informatics Year-in-Review 2024
Clinical Research Informatics Year-in-Review 2024Clinical Research Informatics Year-in-Review 2024
Clinical Research Informatics Year-in-Review 2024Peter Embi
 
Pharmacokinetic Models by Dr. Ram D. Bawankar.ppt
Pharmacokinetic Models by Dr. Ram D.  Bawankar.pptPharmacokinetic Models by Dr. Ram D.  Bawankar.ppt
Pharmacokinetic Models by Dr. Ram D. Bawankar.pptRamDBawankar1
 

Kürzlich hochgeladen (20)

power point presentation of Clinical evaluation of strabismus
power point presentation of Clinical evaluation  of strabismuspower point presentation of Clinical evaluation  of strabismus
power point presentation of Clinical evaluation of strabismus
 
Female Reproductive Physiology Before Pregnancy
Female Reproductive Physiology Before PregnancyFemale Reproductive Physiology Before Pregnancy
Female Reproductive Physiology Before Pregnancy
 
Rheumatoid arthritis Part 1, case based approach with application of the late...
Rheumatoid arthritis Part 1, case based approach with application of the late...Rheumatoid arthritis Part 1, case based approach with application of the late...
Rheumatoid arthritis Part 1, case based approach with application of the late...
 
SGK RỐI LOẠN TOAN KIỀM ĐHYHN RẤT HAY VÀ ĐẶC SẮC.pdf
SGK RỐI LOẠN TOAN KIỀM ĐHYHN RẤT HAY VÀ ĐẶC SẮC.pdfSGK RỐI LOẠN TOAN KIỀM ĐHYHN RẤT HAY VÀ ĐẶC SẮC.pdf
SGK RỐI LOẠN TOAN KIỀM ĐHYHN RẤT HAY VÀ ĐẶC SẮC.pdf
 
"Radical excision of DIE in subferile women with deep infiltrating endometrio...
"Radical excision of DIE in subferile women with deep infiltrating endometrio..."Radical excision of DIE in subferile women with deep infiltrating endometrio...
"Radical excision of DIE in subferile women with deep infiltrating endometrio...
 
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdf
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdfSGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdf
SGK LEUKEMIA KINH DÒNG BẠCH CÂU HẠT HAY.pdf
 
DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptx
DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptxDNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptx
DNA nucleotides Blast in NCBI and Phylogeny using MEGA Xi.pptx
 
How to master Steroid (glucocorticoids) prescription, different scenarios, ca...
How to master Steroid (glucocorticoids) prescription, different scenarios, ca...How to master Steroid (glucocorticoids) prescription, different scenarios, ca...
How to master Steroid (glucocorticoids) prescription, different scenarios, ca...
 
Neurological history taking (2024) .
Neurological  history  taking  (2024)  .Neurological  history  taking  (2024)  .
Neurological history taking (2024) .
 
Red Blood Cells_anemia & polycythemia.pdf
Red Blood Cells_anemia & polycythemia.pdfRed Blood Cells_anemia & polycythemia.pdf
Red Blood Cells_anemia & polycythemia.pdf
 
FDMA FLAP - The first dorsal metacarpal artery (FDMA) flap is used mainly for...
FDMA FLAP - The first dorsal metacarpal artery (FDMA) flap is used mainly for...FDMA FLAP - The first dorsal metacarpal artery (FDMA) flap is used mainly for...
FDMA FLAP - The first dorsal metacarpal artery (FDMA) flap is used mainly for...
 
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdf
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdfSGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdf
SGK RỐI LOẠN KALI MÁU CỰC KỲ QUAN TRỌNG.pdf
 
blood bank management system project report
blood bank management system project reportblood bank management system project report
blood bank management system project report
 
ORAL HYPOGLYCAEMIC AGENTS - PART 2.pptx
ORAL HYPOGLYCAEMIC AGENTS  - PART 2.pptxORAL HYPOGLYCAEMIC AGENTS  - PART 2.pptx
ORAL HYPOGLYCAEMIC AGENTS - PART 2.pptx
 
MedMatch: Your Health, Our Mission. Pitch deck.
MedMatch: Your Health, Our Mission. Pitch deck.MedMatch: Your Health, Our Mission. Pitch deck.
MedMatch: Your Health, Our Mission. Pitch deck.
 
How to cure cirrhosis and chronic hepatitis naturally
How to cure cirrhosis and chronic hepatitis naturallyHow to cure cirrhosis and chronic hepatitis naturally
How to cure cirrhosis and chronic hepatitis naturally
 
Clinical Research Informatics Year-in-Review 2024
Clinical Research Informatics Year-in-Review 2024Clinical Research Informatics Year-in-Review 2024
Clinical Research Informatics Year-in-Review 2024
 
Immune labs basics part 1 acute phase reactants ESR, CRP Ahmed Yehia Ismaeel,...
Immune labs basics part 1 acute phase reactants ESR, CRP Ahmed Yehia Ismaeel,...Immune labs basics part 1 acute phase reactants ESR, CRP Ahmed Yehia Ismaeel,...
Immune labs basics part 1 acute phase reactants ESR, CRP Ahmed Yehia Ismaeel,...
 
Pharmacokinetic Models by Dr. Ram D. Bawankar.ppt
Pharmacokinetic Models by Dr. Ram D.  Bawankar.pptPharmacokinetic Models by Dr. Ram D.  Bawankar.ppt
Pharmacokinetic Models by Dr. Ram D. Bawankar.ppt
 
Biologic therapy ice breaking in rheumatology, Case based approach with appli...
Biologic therapy ice breaking in rheumatology, Case based approach with appli...Biologic therapy ice breaking in rheumatology, Case based approach with appli...
Biologic therapy ice breaking in rheumatology, Case based approach with appli...
 

Anatomy of Larynx Dr Utkal Mishra

  • 1. Anatomy of Larynx Dr Utkal Mishra PG (ENT) VSS MEDICAL COLLEGE, BURLA
  • 2. Introduction  Larynx (voice box) is situated in front of hypopharynx opposite 3rd to 6th cervical vertebra  It extends from Laryngeal inlet to Inferior border of cricoid cartilage.  Primary function of larynx is protection of lower airway from food particles and secretion of oropharynx.
  • 3. Embryology  Larynx develops from - Cranial part of Laryngotracheal groove (Ventral aspect of foregut) during 4th wk of IUL.  Most of the anatomical characteristics of larynx develop by the 3rd month of fetal life.  The larynx descends in the neck to achieve its final position at vertebrae C3-C6 by age - 6 years.
  • 4. Development of laryngeal cartilages Name of the cartilage Developed from  Thyroid cartilage Upper part- 4th arch Lower part – 6th arch  Epiglottis Hypobranchial eminence  Arytenoids 6th arch cartilage  Corniculate 6th arch cartilage  Cricoid 6th arch cartilage
  • 5. Laryngeal Framework  Laryngeal Cartilages  Laryngeal Joints  Laryngeal Ligaments & Membranes.  Laryngeal Muscles  Cavity of Larynx
  • 6. Laryngeal Cartilages  9 in no.  3 unpaired – Thyroid Cricoid Epiglottis  3 paired – Arytenoid Corniculate Cuneiform
  • 12. Laryngeal Joints  2 in no.  Cricoarytenoid joint  Cricothyroid joint
  • 15. Laryngeal Ligaments & Membranes  Extrinsic - Thyrohyoid Membrane Cricotracheal Membrane Hyoepiglottic Membrane  Intrinsic - Cricovocal Membrane Quadrangular Membrane Cricothyroid Ligament Thyroepiglottic Ligament
  • 18. Muscles of Larynx INTRINSIC MUSCLES -  Acting on Vocal cords – Only Abductor - Postr. Cricoarytenoid Adductors - Lateral Cricoarytenoid Interarytenoid (Transv.) Thyroarytenoid Tensors - Cricothyroid Vocalis  Acting on Laryngeal Inlet – Openers - Thyroepiglottic Closers - Aryepiglottic Interarytenoid (oblique) EXTRINSIC MUSCLES – Elevators- Stylopharyngeus Depressors- Sternohyoid Salpingopharyngeous Sternothyroid Palatopharyngeous Omohyoid Thyrohyoid
  • 19. Postr. Cricoarytenoid M.  Only abductor of vocal cord  Origin- Posterior surface of cricoid lamina  Insertion- Muscular process of arytenoid  Action- vocal cord abduction  Nerve - RLN
  • 20. Latr. Cricoarytenoid M.  Origin- Superior border of lateral part of the arch of the cricoid cartilage  Insertion- Muscular process of arytenoid  Action- Vocal cord adduction  Nerve - RLN
  • 21. Interarytenoid M.  Oblique/ transverse part  Adducts the vocal cord  Oblique part continues as aryepiglotticus  Aryepiglotticus have a sphincter action on AE fold during swallowing
  • 22. Thyroarytenoid M.  Origin- Angle of thyroid cartilage  Insertion- Anterolatr. surface of arytenoids  Action- Drags arytenoid forward  Adducter of vocal cord  Internal part of Thyroarytnoid M. - Vocalis
  • 23. Cricothyroid M.  Tensor of vocal cord  Origin- Cricoid arch  Insertion- Infr. border thyroid cartilage  Action- Tilts thyroid forward & cricoid backward -stretches vocal cord  Makes vocal cord thinner & longer - ↑ pitch  Nerve - External branch of SLN
  • 24. Cavity of Larynx  It starts from Layngeal Inlet & ends at lower border of cricoid cartilage.  Divided into 3 parts by vestibular & vocal folds 1. Vestibule 2. Ventricle 3. Subglottis
  • 25. Cavity of Larynx (cont.)  Vestibule – Extends from laryngeal inlet to vestibular folds Antr. wall - Postr. surface of Epiglottis Latr. Wall – Aryepiglottic folds Postr. Wall – Arytenoids  Ventricles – Space between vestibular & vocal folds - Extends above to form Saccule - Mucous glands in saccule lubricates vocal cords  Subglottis – Extends from vocal cords to lower border of cricoid.
  • 26. Glottis  Elongated space between vocal cords anteriorly & vocal process & base of arytenoids posteriorly.  Anteroposteriorly - 24mm in male & 16 mm in female.  Anterior 3/5th - Membranous (Phonatory glottis)  Posterior 2/5th - Cartilagenous (Respiratory glottis)
  • 27. Vocal Cords Histologicaly the vocal cord contains 5 layers 1. Epithelial layer 2. Superficial LP 3. Intermediate LP 4. Deep LP 5. Vocalis Muscle
  • 28. Mucous Membrane of Larynx  Pseudo stratified ciliated columnar epithelium  Except - Upper ½ of postr. Surface of Epiglottis Upper part of Aryepiglottic fold Postr. Glottis Vocal Cords which are covered by – Nonkeratinizing Stratified Squamous Epithelium
  • 29. Spaces within Larynx  3 in no.  Preepiglottic Space of Boyer  Paraglottic Space  Rienke’s Space
  • 30. Pre-epiglottic Space of Boyer  Boundary - Antr.ly – Thyrohyoid Membrane Hyoid bone Postr.ly- Epiglottis Supr.ly – Hyoepiglottic Ligament  Contents – Fat, Areolar tissue , Lymphatics  It is continous laterally with Paraglottic space.
  • 31. Paraglottic Space  Bounded  Laterally – Thyroid Cartilage  Medially – Conus Elasticus - Quadrangular Membrane  Posteriorly – Mucosa of Pyriform Fossa It encompasses the laryngeal ventricle & saccule Paraglottic Space
  • 32. Rienkes Space  It is the space underlying Epithelium of vocal cords  Bounded  Above & Below – Arcuate Lines  In front - Anterior Comissure  Behind – Vocal process of Arytenoid
  • 33. Nerve Supply Of Larynx  Motor –  All Intrinsic M. – Rec. Laryngeal N.  Except Cricothyroid – Extn. Br. Of Supr. Laryngeal N.  Sensory –  Above Vocal Cords – Internal Br. Of Supr. Laryngeal N.  Below Vocal Cords – Rec. Laryngeal N.  Rec. Laryngeal N. arises from trunk of Vagus.  Supr. Laryngeal N. arises from Inferior Ganglion of Vagus.
  • 35. Lymphatic Drainage  The part of the larynx above the vocal folds is drained by vessels accompanying the superior laryngeal vein to UPPER DEEP CERVICAL NODES  Below the vocal folds drains with the inferior vein, into PRE-LARYNGEAL and PRE-TRACHEAL nodes.  The vocal folds are devoid of lymphatics. (Water- Shed zone)
  • 36. Paediatric Larynx  Positioned high in neck – C3 - C4  Cartilages soft & collapsible  Submucosal tissue are loose  Small & Conical  Narrowest portion is subglottis