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Saddam Ansari
2nd year
Tbilisi State Medical University
AUTONOMIC NERVOUS SYSTEM
(ANS)
Introduction
 Portion of nervous system
 Regulation of visceral functions
 Also known as vegetative or
involuntary nervous system
Autonomic nervous system (ans)
Sympathetic Division
 Called as thoracolumbar outflow
 Supplies smooth muscle fibers of
visceral organs
Blood vessels
Heart
Lungs
Glands
Gastrointestinal organs etc.
Continued…
 Consists of pre and post ganglionic fiber
Sympathetic Ganglia
Classified into 3 groups
1. Paravertebral or sympathetic
chain ganglia
2. Prevertebral or collateral ganglia
3. Terminal or peripheral ganglia
Autonomic nervous system (ans)
Sympathetic Chain Ganglia
Arrangement-
Segmental fashion
Location-
Anterolateral
surface of vertebral
column
Division of Sympathetic chain
Ganglia
1.Cervical ganglia-8cervial ganglia
into 3 groups
• Superior cervical ganglion
• Fusion of upper 4 cervical ganglia
• Middle cervical ganglion
• Fusion of 5th and 6th cervical ganglia
• Inferior cervical ganglion
• Fusion of 7th and 8th cervical ganglia
Continued…
2.Thoracic ganglia
12 thoracic ganglia present on
each side
Preganglionic fibers originates form
thoracic segment of spinal cord
Postganglionic fibers are
distributed into thorax and
abdomen
Autonomic nervous system (ans)
Continued…
3.Lumbar ganglia
• 5 lumbar ganglia
• Preganglionic fibers arises form L1 and
L2 segments and reach the lumbar
ganglia.
• Postganglionic fibers supply the
abdominal and pelvic organs:
• Urinary bladder
• Colon etc.
Continued…
4.Sacral ganglia
 5 sacral ganglia
 Receives preganglionic fibers from
L1 and L2 segments
 Postganglionic fibers innervates
blood vessels and sweat glands in
lower limb
Prevertebral or Collateral
Ganglia
Situated in thorax,abdomen and
pelvis
Preganglionic fibers arises from T5
to L2 segments
Prevertebral ganglia are :
Celiac ganglion
Superior mesenteric ganglion
Inferior mesenteric ganglion
Autonomic nervous system (ans)
Terminal or Peripheral Ganglia
 Situated within or close to structures
innervated by them.
 E.g. heart, bronchi, pancreas and
urinary bladder.
Sympathoadrenergic System
 Includes sympathetic division and
adrenal medulla
 Adrenal medulla is modified
sympathetic ganglion.
 Increase in sympathetic activity
increases the secretion of
catecholamines.
Autonomic nervous system (ans)

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Autonomic nervous system (ans)

  • 1. Saddam Ansari 2nd year Tbilisi State Medical University AUTONOMIC NERVOUS SYSTEM (ANS)
  • 2. Introduction  Portion of nervous system  Regulation of visceral functions  Also known as vegetative or involuntary nervous system
  • 4. Sympathetic Division  Called as thoracolumbar outflow  Supplies smooth muscle fibers of visceral organs Blood vessels Heart Lungs Glands Gastrointestinal organs etc.
  • 5. Continued…  Consists of pre and post ganglionic fiber
  • 6. Sympathetic Ganglia Classified into 3 groups 1. Paravertebral or sympathetic chain ganglia 2. Prevertebral or collateral ganglia 3. Terminal or peripheral ganglia
  • 8. Sympathetic Chain Ganglia Arrangement- Segmental fashion Location- Anterolateral surface of vertebral column
  • 9. Division of Sympathetic chain Ganglia 1.Cervical ganglia-8cervial ganglia into 3 groups • Superior cervical ganglion • Fusion of upper 4 cervical ganglia • Middle cervical ganglion • Fusion of 5th and 6th cervical ganglia • Inferior cervical ganglion • Fusion of 7th and 8th cervical ganglia
  • 10. Continued… 2.Thoracic ganglia 12 thoracic ganglia present on each side Preganglionic fibers originates form thoracic segment of spinal cord Postganglionic fibers are distributed into thorax and abdomen
  • 12. Continued… 3.Lumbar ganglia • 5 lumbar ganglia • Preganglionic fibers arises form L1 and L2 segments and reach the lumbar ganglia. • Postganglionic fibers supply the abdominal and pelvic organs: • Urinary bladder • Colon etc.
  • 13. Continued… 4.Sacral ganglia  5 sacral ganglia  Receives preganglionic fibers from L1 and L2 segments  Postganglionic fibers innervates blood vessels and sweat glands in lower limb
  • 14. Prevertebral or Collateral Ganglia Situated in thorax,abdomen and pelvis Preganglionic fibers arises from T5 to L2 segments Prevertebral ganglia are : Celiac ganglion Superior mesenteric ganglion Inferior mesenteric ganglion
  • 16. Terminal or Peripheral Ganglia  Situated within or close to structures innervated by them.  E.g. heart, bronchi, pancreas and urinary bladder.
  • 17. Sympathoadrenergic System  Includes sympathetic division and adrenal medulla  Adrenal medulla is modified sympathetic ganglion.  Increase in sympathetic activity increases the secretion of catecholamines.