Question

What is optic chiasm?

Answer 1

Hint: Optic nerve present in the brain works to carry impulses from the photoreceptors to optic lobes of the brain. The optic tract arises from optic chiasma passing posterolateral through the cerebral peduncle. Each track consists of optic fibres, they end by synapsing with nerve cells in geniculate bodies.

Complete answer:
The visual pathway begins at the retina, it passes impulses to the brain through the optic nerve, to the optic chiasm, optic tract, lateral geniculate bodies, and finally to the visual cortex of the brain for interpretation. The optic chiasm represents the visual pathway, with an adaptation to assist humans with binocular vision and stereopsis.

The optic chiasm or optic chiasma is an X shaped appearance with a height of 3.5mm and 15mm width. It is located in the forebrain inferior to the hypothalamus. They are crucial to vision, the right and left optic nerves present in the brain interact and form X shaped appearance. An optic chiasm is a place where the two nerves meet, just below the hypothalamus, it is vital for perception and vision to occur. The crossing over information from right to left eye takes place in chiasma.

The place in the brain where some of the optic nerve fibres coming from one eye cross optic nerve fibres from the other eye. Also called the optic chiasm. The processing of visual information from both eyes takes place in two halves of the brain. The place in the brain where some of the optic nerve fibres coming from one eye cross optic nerve fibres from the other eye are called optic chiasma.

Note: The optic chiasm is formed by the crossing of the optic nerves in the brain. It connects the brain to the eye. The partial crossing over of two optic nerve fibres at the place of optic chiasm allows the visual cortex to receive the same hemispheric visual field from both eyes.