Question

Following a spinal cord injury suffered in a motor vehicle accident, a 22-year-old male has lost fine motor function of his fingers and thumb but is still able to perform gross motor movements of his hand and arm. Which of the following components of his white matter has most likely been damaged?

A) The inner layer (archilayer)
B) The middle layer (paleolayer)
C) The outer layer (neolayer)
D) The reticular formation

Answer 1

The outer layer (neolayer).

Step-by-step explanation:

The central nervous system includes the brain and spinal cord in humans. The spinal cord is present in the brain stem extended from the medulla oblongata. The spinal cord is protected by the vertebral column.

The spinal cord is protected by the three layers. The outer most layer also known as dura matter consists of nerves and connective tissue. This layer protects the spinal cord and maintains the functions like movement of finger, nails of the body.

Thus, the correct answer is option (C).