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Visual reflexes concept

3927 Views 5 Replies 6 Participants Last post by  vnagubandi
Interesting question :

The concensual and the direct light reflex are clinical maneuver to test for the integrity of which of the following areas?

A) Medulla
B) Midbrain
C) Pons
D) Superior cervical ganglion
E) Visual cortex
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Its da midbrain at the section of Superior colliculi level.
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The light reflex pathway:
Retina -> optic nerve -> optic tract -> lateral geniculate nucleus -> pretectal nucleus -> Edinger Westphal nucleus -> Ciliary ganglion -> Pupillary constrictor muscle.

The green items above are the only parts of the pathway that present in the brain stem and specifically in the midbrain.
Ciliary ganglion is in the orbit. Lateral geniculate is in the thalamus.

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