Neuromuscular, Digestive and Respiratory Systems: Segment of Autonomic Nervous System

Segment of Autonomic Nervous System

SEGMENTS OF ANS

The ANS is divided into small segments after its origin from CNS.
Three segments are evident:

Cranial segment

From brain stem with nerve fibers of oculomotor, facial, Glossopharyngeal & Vagus

Thoraco lumbar segment

From spinal cord with ventral root of spinal nerves from T₁ or L_5or6 segments.

Sacral segment

From spinal cord and the ventral root of S₁-S₃ Sacral nerves.
Preganglonic axons of the parasympathetic division originate in the cell bodies of the brain stem (cranial out flow) and in the terminal segment of (sacral out flow ) of the spinal cord .

Last modified: Saturday, 28 May 2011, 9:24 AM

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      - Autonomic Nervous System
      - Classification of ganglia
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      - Segment of Autonomic Nervous System
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VPB 121: Veterinary Physiology - II (2+1)

Segment of Autonomic Nervous System

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