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

Question

Quizplus · Accepted Answer

Fine manipulation skills are the domain of the outer layer, or neolayer, of the tract systems. The inner and middle layers and the reticular formation are not noted to be responsible for these functions.

Following a Spinal Cord Injury Suffered in a Motor Vehicle