Bell's palsy is best described as what?

• A. A form of facial paralysis due to dysfunction of cranial nerve VII
• B. A progressive degeneration of motor neurons in the spinal cord
• C. A retinal detachment
• D. Inflammation of the auditory nerve

Answer: (A)

Bell's palsy is a peripheral facial nerve palsy, meaning it results from dysfunction of cranial nerve VII, which controls the muscles of facial expression. When this nerve is affected, one side of the face becomes weak or paralyzed, including the forehead, eye, and mouth, often appearing suddenly. This focal facial weakness distinguishes it from disorders involving other structures. The other options point to problems in different parts of the nervous system or eye: degeneration of spinal motor neurons describes a motor neuron disease, retinal detachment involves the retina, and inflammation of the auditory (vestibulocochlear) nerve affects hearing and balance rather than facial movement.