anatomy of muscles

1. Muscles
Dr Rishi Pokhrel
Maj
MBBS, MD
Lecturer, NAIHS

2. Introduction
• Latin – mus - mouse
• Many resemble a mouse & with their tapering ends
(tendons) representing tail
• Contractile tissue - brings about movement
• Motors of body
• Types

3. Structure
• Epimysium
• Perimysium
• Edomysium

4. Parts of skeletal muscle
• Origin: muscle end; relatively fixed during contraction
• Insertion: muscle end; moves during contraction
• Attachments: origin & insertion are interchangeable
• Belly: Fleshy, Contractile
• Fibrous: Non contractile
– Tendon (cord like)
– Aponeurosis (flattened sheet)

5. Muscles of upper limb
• Back
• Scapular region
• Chest
• Arm
• Forearm
• Hand

6. Back Chest

7. Scapular region

8. Deltoid
Origin: Inferior edge of the crest of the
spine of the scapula, lateral margin of
the acromion, anterior border of lateral
one-third of clavicle
Insertion: Deltoid tuberosity of
humerus
Nerve supply: Axillary nerve [C5,C6]
Action: Abduction of arm
Applied: IM injection

10. Arm & Forearm

14. Muscles of lower limb
• Gluteal region
• Inguinal region
• Thigh
• Leg
• Foot

15. Gluteal Region
• Gluteus maximus
• Gluteus medius
• Gluteus minimis
• Piriformis
• Obturator internus
• Gemellus superior
• Gemellus inferior
• Qadratus femoris
• Tensor fasciae latae

16. Gluteus Maximus

17. Gluteus Maximus
• Origin: Fascia covering gluteus
medius, ilium, fascia of erector
spinae, sacrum, lateral, coccyx,
sacrotuberous ligament
• Insertion: Iliotibial tract &
gluteal tuberosity of femur
• Nerve supply: Inferior gluteal
nerve (L5,S1,S2)
• Action: Extension, lateral
rotation and abduction of hip
• Applied: IM injection

19. Inguinal Muscles

20. Thigh

21. Hamstrings – Muscles
of Back of Thigh
• Semitendinosus
• Semimembranosus
• Biceps femoris
• Adductor magnus –
hamstring part

22. Anterior compartment
• Quadriceps
– Vastus lateralis
– Vastus intermidius
– Vastus medialis
– Rectus femoris
• Sartorius

23. Medial compartment
• Adductor longus
• Adductor brevis
• Adductor magnus
• Gracilis
• Pectineus
• Obturator externus

24. Leg

25. Pelvic diaphram