Asked by Samantha Dopson on May 08, 2024
Verified
Ptosis (drooping of the upper eyelid) of the left eye would be caused by damage to the ________ nerve.
A) facial
B) abducens
C) trochlear
D) oculomotor
E) optic
Ptosis
Falling down of an organ—for example, the drooping of the upper eyelid.
Oculomotor Nerve
The cranial nerve III, responsible for controlling a majority of eye movements, pupil constriction, and keeping the eyelid open.
Upper Eyelid
The movable tissue covering the upper portion of the eye, protecting it and regulating the amount of light that enters.
- Elucidate the duties of cranial nerves in sensory and motor capacities.
- Understand the disease states associated with lesions to specific cranial nerves and their clinical expressions.
Verified Answer
JL
jennifer llerenaMay 10, 2024
Final Answer :
D
Explanation :
The oculomotor nerve (cranial nerve III) innervates several muscles that control eye movements, including the levator palpebrae superioris muscle, which is responsible for elevating the upper eyelid. Damage to this nerve can result in ptosis, or drooping of the upper eyelid.
Learning Objectives
- Elucidate the duties of cranial nerves in sensory and motor capacities.
- Understand the disease states associated with lesions to specific cranial nerves and their clinical expressions.