Pupils

Question 1

Pupil Functions

Answer 1

1. Adjust quantity of light reaching retina
2. Minimize spherical aberrations of peripheral cornea and lens
3. Increase depth of field

Question 2

Parasympathetic AFFERENT pathway

Answer 2

1. PR
2. BP cells
3. GC
4. ON
5. Optic Chiasm
6. Pretectal nucleus
7. EWN

Question 3

Parasympathetic EFFERENT pathway

Answer 3

1. EW Nucleus
2. Inf division of CN 3
3. Ciliary ganglion
4. Sphincter

Question 4

TRUE/FALSE: Damage to LGN, optic radiations, pr visual cortex results in a delayed pupillary response

Answer 4

FALSE

Question 5

Pupils stimulated by

Answer 5

1. Light
2. Near synthesis
3. Sleep

Question 6

There is NO clinical situation in which the ___ reflex is observed but the ___ reflex is not.

Answer 6

There is NO clinical situation in which the light reflex is observed but the near reflex is not.

Question 7

Pupil (EW) inhibited by

Answer 7

1. Cortical (eg pupils dilate during seizure)
2. Spinal reticular (arousal, excitement, anxiety)

Question 8

Which pupillary pathway is relatively unknown.

Answer 8

Afferent

Question 9

Dilation pathway:

Answer 9

1. Hypothalamus (Locus Coeruleus)
2. LC projects to intermedia-lateral column (IML) of spinal cord
3. IML projects to CSG
4. Leads to dilator mm