Optic Nerve

The optic nerve is located in the back of the eye. This structure is responsible for carrying the images we see from the retina to the brain. It is the second cranial nerve which carries these impulses from the more than one million ganglion cells of the retina toward the visual centers in the brain.

Optic Nerve

It is a sensory nerve and it transmits information received on the rods and cones in the eye, known as photoreceptors, to the place at the back of the eyeball that gathers it for the optic nerves. There are about 125 million nerve fibers which make up the optic nerve congregate. As a unit, they can then pass through the optic canal and enter the brain through the cranial cavity. Each eyeball has its own optic nerve and these two nerves then meet at the diencephalon, along the floor, to create a unified nerve known as the optic chiasma. If the optic nerve becomes damaged or severed, blindness results to the eye that is damaged.

Optic Nerve Structure

The following information is provided to convey the facts about the anatomical structure that allows light gathered through the retina and passing along the optic nerve to be perceived through our vision as sight.

The optic chiasma serves as a point of intervention to gather the impulses from the optic nerve.
Nerve fibers rise up from the medial half of each retina.
These fibers cross over at the point of the optic chiasma.
From the point of the optic chiasma , these nerve fibers continue toward the brain.
Optic tracts lead toward the thalamus.
Specific thalamic nuclei receive the optic nerve fibers.
When these optic nerve fibers reach the thalamus, the fibers fuse with the nuclei.
Most of the ganglion axon cells are devoid of collaterals, but a few of them use theirs to convey various impulses from the thalamic nuclei to the superior colliculi.
Synapses within the thalamic nuclei become the passageway for the synapse between impulses which are required to pass through the neurons.
The visual cortex can be found within the occipital lobe.
The neurons that send impulses which are sent over the synapse lead to the visual cortex.
The entire system of the optic nerve is set up to allow the appropriate neuron, and nerves to respond to the light stimuli which then results in reflexive actions that in turn produce motor responses to allow eye motion.

Optic Nerve Structure

The optic chiasma serves as a point of intervention to gather the impulses from the optic nerve.
Nerve fibers rise up from the medial half of each retina.
These fibers cross over at the point of the optic chiasma.
From the point of the optic chiasma , these nerve fibers continue toward the brain.
Optic tracts lead toward the thalamus.
Specific thalamic nuclei receive the optic nerve fibers.
When these optic nerve fibers reach the thalamus, the fibers fuse with the nuclei.
Most of the ganglion axon cells are devoid of collaterals, but a few of them use theirs to convey various impulses from the thalamic nuclei to the superior colliculi.
Synapses within the thalamic nuclei become the passageway for the synapse between impulses which are required to pass through the neurons.
The visual cortex can be found within the occipital lobe.
The neurons that send impulses which are sent over the synapse lead to the visual cortex.
The entire system of the optic nerve is set up to allow the appropriate neuron, and nerves to respond to the light stimuli which then results in reflexive actions that in turn produce motor responses to allow eye motion.

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