Relative Afferent Pupillary Defect Flashcards
1
Q
What is a Relative afferent pupillary defect also known as?
A
A Marcus-Gunn Pupil
2
Q
What test is done to find a relative afferent pupillary defect?
A
The Swinging Light Test
3
Q
What is the physiological cause of a relative afferent pupillary defect?
A
A lesion anterior to the optic chiasm
4
Q
What are some causes of a relative afferent pupillary defect?
A
- Retina: Retinal detachment
- Optic nerve: optic neuritis (e.g. MS)
5
Q
What is the pathway of the pupillary light reflex?
A
Afferent: retina–> optic nerve –> lateral geniculate body –> midbrain
Efferent: Edinger-Westphal nucleus (midbrain) –> occulomotor nerve (Third Nerve)
