What is the term use to describe the degeneration of motor neurons occurring at the level of the corticobulbar pathway?
A)Frontal dementia
B)Progressive bulbar palsy
C)Pseudo bulbar palsy
D)Primary lateral sclerosis

Question

Quizplus · Accepted Answer

If the degeneration of motor neurons occurs at the level of the corticobulbar pathway, then it is termed pseudo bulbar palsy.
In pseudo bulbar palsy, the clinical features are due to degeneration of carticobulbar pathways to V, VII, X, XI and XII cranial nerve motor nuclei. Exaggerated jaw jerk and brisk gag reflex will be present.
Frontal dementia occurs due to the atrophy of the frontal lobe in the precentral gyrus.
Progressive bulbar palsy occurs due to the cranial nerve nuclei atrophy. There will be presence of lower motor neuron signs. The jaw jerk and gag reflex will be absent.
Primary lateral sclerosis occurs due to atrophy of corticospinal tract.

What Is the Term Use to Describe the Degeneration of Motor