What does the second cranial nerve do?

Second cranial nerve: The second cranial nerve is the optic nerve, the nerve that connects the eye to the brain and carries the impulses formed by the retina — the nerve layer that lines the back of the eye, senses light and creates the impulses — to the brain which interprets them as images.

Which nerves carry impulses from eyes to brain?

Optic nerve: The optic nerve connects the eye to the brain. The optic nerve carries the impulses formed by the retina, the nerve layer that lines the back of the eye and senses light and creates impulses. These impulses are dispatched through the optic nerve to the brain, which interprets them as images.

What carries signals from the retina to the brain?

The retina is a soft, light-sensitive layer of nervous system tissue. The optic nerve carries signals from the retina to the brain, which interprets them as visual images.

How is the second cranial nerve related to the optic nerve?

See Article History. Alternative Title: second cranial nerve. Optic nerve, second cranial nerve, which carries sensory nerve impulses from the more than one million ganglion cells of the retina toward the visual centres in the brain. The vast majority of optic nerve fibres convey information regarding central vision.

Where do the cranial nerves exit the brain?

Cranial nerves exit from the lower portion of the brain through the opening at the base of the skull. Three of these cranial nerves are sensory, 1 cranial nerve is purely motor, and the other eight are mixed sensory and motor nerves. These eight nerves may be mostly sensory or motor but actually, function in both capacities.

How are the cranial nerves related to the CNS?

The cranial nerves carry information to and from the CNS. And, they mostly supply the head and neck structures. The sensory nerve fibers send information to the central nervous system such as pain. And the motor nerve fibers send instructions for movements such as facial expressions.

Which is part of the brain carries the optic nerve?

Optic nerve, second cranial nerve, which carries sensory nerve impulses from the more than one million ganglion cells of the retina toward the visual centres in the brain. The vast majority of optic nerve fibres convey information regarding central vision.

See Article History. Alternative Title: second cranial nerve. Optic nerve, second cranial nerve, which carries sensory nerve impulses from the more than one million ganglion cells of the retina toward the visual centres in the brain. The vast majority of optic nerve fibres convey information regarding central vision.

Where does the optic nerve transmit visual information?

The optic nerve, also known as cranial nerve II, or simply as CN II, is a paired cranial nerve that transmits visual information from the retina to the brain.

Where do the nerves of the cranium come from?

The cranial nerves are composed of twelve pairs of nerves that emanate from the nervous tissue of the brain. In order to reach their targets they must ultimately exit/enter the cranium through openings in the skull. Hence, their name is derived from their association with the cranium.

Which is the nerve closest to the front of the head?

For example, your olfactory nerve is closest to the front of your head, so it’s designated as I. Their functions are usually categorized as being either sensory or motor. Sensory nerves are involved with your senses, such as smell, hearing, and touch. Motor nerves control the movement and function of muscles or glands.