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  • The number of pairs of thoracic spinal nerves is  Option: 1 31  <

The number of pairs of thoracic spinal nerves is

 

Option: 1

31

 


Option: 2

12

 


Option: 3

5


Option: 4

8


Answers (1)

best_answer
 

As we have learnt:

Spinal Cord: Location

  • The spinal cord is part of the central nervous system (CNS). 
  • It is situated inside the vertebral canal of the vertebral column. 
  • The spinal cord is a continuation of the brainstem. 
  • It lies in the neural canal of the vertebral column.
  • It extends from the foramen magnum at the base of the skull to the L1/L2 vertebra where it terminates as the conus medullaris (medullary cone). 
  • A thin thread called filum terminale extends from the tip of the conus medullaris all the way to the 1st coccygeal vertebra (Co1) and anchors the spinal cord in place. 
  • Like the vertebral column, the spinal cord is divided into segments: cervical, thoracic, lumbar, sacral, and coccygeal. 
  • Each segment of the spinal cord provides several pairs of spinal nerves, which exit from the vertebral canal through the intervertebral foramina. 
  • There are 8 pairs of cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal pair of spinal nerves (a total of 31 pairs).

There are 8 pairs of cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal pair of spinal nerves (a total of 31 pairs). Hence, the correct answer is option b.

Posted by

himanshu.meshram

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