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  • If dorsal nerve of spinal cord is broken down then its effect is  Option: 1 No impulse is transmitted</p

If dorsal nerve of spinal cord is broken down then its effect is

 

Option: 1

No impulse is transmitted

 


Option: 2

Impulse is transmitted but slowly

 


Option: 3

Impulse is transmitted fast

 


Option: 4

No effect on impulse

 


Answers (1)

best_answer

As we have learnt:

 

Internal Structure of Spinal Cord

  • The spinal cord is divided into left and right symmetrical halves by the posterior median sulcus and the anterior median fissure.
  • The inner butterfly-shaped area is the grey matter of the spinal cord.
  • Surrounding the grey matter are bundles of myelinated nerve fibres, called fasciculi or white columns, which together form the white matter of the spinal cord.
  • In each segment of the spinal cord a spinal nerve arises from each side of the cord. 
  • Each spinal nerve connects with the cord through two nerve roots.
  • Anterior or ventral roots transmit motor information, and they originate from the anterior horns of the gray matter and exit the spinal cord through the anterolateral sulcus. 
  • The posterior or dorsal nerve root consists of a bundle of sensory axons (carrying incoming signals) whose cell bodies are located in the dorsal root ganglion. 
  • These axons extend into the posterior horn of the grey matter, where they often form synapses with other neurons, some of which are called interneurons.
  • Interneurons, short neurons confined to the grey matter of the cord, form synapses with other interneurons and motor neurons whose cell bodies are located in the anterior horn of the grey matter.

If dorsal nerve of spinal cord is broken down then its effect is that no impulse will be transmitted. Hence, the correct answer is option a.

Posted by

SANGALDEEP SINGH

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