What is optic chiasma?

What is optic chiasma?

(OP-tik ky-AZ-muh) The place in the brain where some of the optic nerve fibers coming from one eye cross optic nerve fibers from the other eye. Also called optic chiasm.

What is optic chiasm quizlet?

– At the optic chiasm, the optic nerve fibers from the nasal halves of the retinas cross to the opposite sides, where they join the fibers from the opposite temporal retinas to form the optic tracts. You just studied 76 terms!

What is the function of the optic?

The optic nerve may be found in your eye, but it is part of the central nervous system. The optic nerve takes visual information gathered from your eye and transmits it using a series of electrical impulses to the parts of your brain that act as vision centers, allowing you to make sense of what you are seeing.

What does damage to optic chiasm do?

Damage to the retina or one of the optic nerves before it reaches the chiasm results in a loss of vision that is limited to the eye of origin. In contrast, damage in the region of the optic chiasm—or more centrally—results in specific types of deficits that involve the visual fields of both eyes (Figure 12.8).

How optic chiasma is formed?

The optic chiasm is an X-shaped structure formed by the crossing of the optic nerves in the brain. The optic nerve connects the brain to the eye. To biologists, the optic chiasm is thought to be a turning point in evolution.

What crosses in the optic chiasm?

In the optic chiasm, the fibers of the nasal retina (i.e., the temporal visual field) of each eye cross, whereas the fibers of the temporal retina (i.e., the nasal visual field) of each eye proceed uncrossed. Thus, each optic tract contains visual fibers from the same hemifield of each eye.

Why are eye nerves crossed?

The optic chiasm is an X-shaped structure formed by the crossing of the optic nerves in the brain. 1 It is thought that the crossing and uncrossing optic nerve fibers that travel through the optic chiasm developed in such a way to aid in binocular vision and eye-hand coordination.

Does optic nerve cross?

Our optic nerves cross inside our brains The optic chiasm is an X-shaped structure formed by the crossing of the optic nerves in the brain. The optic nerve connects the brain to the eye. To biologists, the optic chiasm is thought to be a turning point in evolution.