Nervous System

Question 1

A patient shows increased stretch reflexes in one of his arms. Further tests reveal
weakness in voluntary movements of the arm. Which of the following structures is a
likely cause for this condition?

Answer 1

Stroke (cerebrovascular occlusion) in the CNS affecting descending tracts that
control arm movements

Question 2

Which of the following is considered part of the Central Nervous system?

Answer 2

Spinal Cord

Question 3

An 80-year-old man experiences weakness and loss of sensation in his left leg. Test
show that stretch reflexes are greatly reduced in that leg. Which of the following
structures is a likely cause for this condition and the presence of the motor and sensory symptoms?

Answer 3

Compression of spinal nerves (PNS) to the leg