Central Visual Pathways - Central Projections of Retinal Ganglion Cells

5 important questions on Central Visual Pathways - Central Projections of Retinal Ganglion Cells

What is the major target of the axons of the ganglion cells of the retina?

The dorsal lateral geniculate nucleus of the thalamus. Via this nucleus axons are send towards the cortex.

Information from the retina ganglion cells also targets the pretectum. What is the function of the pretectum?

Controlling the diameter of the pupil via the Edinger-Westpal nucleus

What is a possible conclusion after stimulating the left eye with light, and no respons follows? While light on the right eye elicits contriction of both pupils.

The retina or optic nerve of the left eye is damaged. The pretectum innervates both eyes, so the light respons in the right eye causes constriction of both pupils.
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Via what nucleus are the visceral functions altered because of day/night differences?

Via the suprachiasmatic nucleus

What could be an explanation of a maintained circadian rythm after loss of vision (loss of rods/cones)

There are multiple different ganglion cells in the retina. Other ganglion cells are sensitive to light, but process the circadian rythm instead of vision

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