For the processing of visual information in the central nervous system of humans, the neuronal projections of ganglion cells to the left and right lateral geniculate nuclei (LGN)are
A) all ipsilateral, meaning that left eye projections stay on the left side of the brain, and vice versa.
B) all contralateral, meaning that left eye projections project to the right side of the brain, and vice versa.
C) ipsilateral for the temporal side of each retina, and contralateral for the nasal side of each retina.
D) ipsilateral for the nasal side of each retina, and contralateral for the temporal side of each retina.
E) randomly crossed in terms of which side of the retina projects to either the left or right side of the brain.

Question

Quizplus · Accepted Answer

Ganglion cells from the nasal side of each retina cross over to the opposite side of the brain at the optic chiasm, while those from the temporal side remain on the same side of the brain. Therefore, projections from the left eye will cross over to the right side of the brain for the left nasal retina, and stay on the left side of the brain for the left temporal retina. The opposite is true for the right eye.

For the Processing of Visual Information in the Central Nervous