A 74-year-old comatose man, exhibits flexion of the left upper extremity with passive movement of the head to the right, and flexion of the right upper extremity when the head is moved to the left. His legs are fixed in extension during all movements. Which of the following is the most likely explanation of these findings?
A) Alternating hemiplegia syndrome
B) Brown-Séquard syndrome
C) Decerebrate rigidity
D) Decorticate rigidity
E) Transection of the spinal cord below vertebra TV

Question

Quizplus · Accepted Answer

The described symptoms are indicative of decorticate rigidity, which is characterized by abnormal flexion of the upper extremities and extension of the lower extremities. This posture suggests damage to the corticospinal tract above the level of the brainstem.

A 74-Year-Old Comatose Man, Exhibits Flexion of the Left Upper