There are ..... pairs of spinal nerves arising from the spinal cord

Category: Miscellaneous Indian Gk

Hint: Consider the spinal cord's segments and the nerves that branch from them.

Correct Answer: D) 31

Exam Relevance: NEET, AIIMS, JEE Main, JEE Advanced

Difficulty: Easy

Explanations:

Cervical Spinal Nerves: There are 8 pairs of cervical spinal nerves (C1 to C8). These nerves are associated with the neck and upper limbs.

Thoracic Spinal Nerves: There are 12 pairs of thoracic spinal nerves (T1 to T12). These nerves are associated with the chest and upper abdomen.

Lumbar Spinal Nerves: There are 5 pairs of lumbar spinal nerves (L1 to L5). These nerves are associated with the lower back and the legs.

Sacral Spinal Nerves: There are 5 pairs of sacral spinal nerves (S1 to S5). These nerves are associated with the pelvis and lower legs.

Coccygeal Spinal Nerve: There is 1 pair of coccygeal spinal nerves (Co1). This nerve is associated with the coccyx (tailbone).

Option Analysis:

Option A: This option is incorrect. There are not just 2 pairs of spinal nerves. The spinal cord has 31 pairs of spinal nerves, each pair originating from a specific segment of the spinal cord.
Option B: This option is incorrect. There are not 30 pairs of spinal nerves. The correct number is 31 pairs, which includes 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal pairs.
Option C: This option is incorrect. There are not 4 pairs of spinal nerves. The spinal cord has 31 pairs of spinal nerves, each pair originating from a specific segment of the spinal cord.
Option D: This option is correct. There are 31 pairs of spinal nerves arising from the spinal cord. These nerves are distributed along the length of the spinal cord and are responsible for sensory and motor functions in different regions of the body.

Mnemonic: Remember "31" as the number of spinal nerve pairs.