Question

Answer the following about CN: IV

- Name
- Function
- Test
- + for test
- Safety
- MOI

Answer 1

The function being tested when a patient is asked to follow the tip of a pen with their eyes is eye movement. This test assesses the function of the oculomotor nerve and the abducens nerve.

Step-by-step explanation:

When a patient is asked to follow the tip of a pen with their eyes, the function being tested is the eye movement. This test assesses the function of the oculomotor nerve (CN III) and the abducens nerve (CN VI). The oculomotor nerve controls most of the eye movements, while the abducens nerve specifically controls lateral movement of the eye.

The oculomotor nerve is responsible for the adduction (movement towards the nose), elevation (movement upward), and depression (movement downward) of the eyeball. The abducens nerve primarily controls the abduction (movement away from the nose) of the eyeball.

Overall, this test helps evaluate the integrity and coordination of eye movements, which are essential for vision and gaze control.