Upper Motor Neuron (Or Pyramidal Tract)syndrome Is

Question

Upper motor neuron (or pyramidal tract)syndrome is:
A)Characterized by the permanent loss of the stretch reflexes.
B)Fully expressed when only the corticospinal tract is interrupted.
C)Characterized by a lasting decrease in muscle tone.
D)Characterized by Babinski's sign and the appearance of other pathological reflexes.
E)Fully expressed after damage to the vestibular nuclei.

Accepted Answer

Upper motor neuron syndrome is characterized by Babinski's sign and the appearance of other pathological reflexes. It is caused by damage to the corticospinal tract, which leads to spasticity and hypertonia, rather than a decrease in muscle tone. It does not necessarily result in the permanent loss of stretch reflexes. Damage to the vestibular nuclei would not result in the full expression of upper motor neuron syndrome.