Is the retina part of the brain? If Yes why?

Question

I need help!!!!!!!!!!

Answer 1

Retina is part of the eye,

Answer 2

This is an interesting question, and not as trivial as you may think.

Anatomically, no. The brain is considered to be that part of the nervous system physically located in the cranium. The retina, anatomically, is considered part of the eye.

However, *functionally*, one could make the argument that the retina is performing some brain functions. There is some processing. For example, the detection of edges and motion starts right in the retina. The feature known as "color constancy" occurs right in the retina ... for example, when you look at a color on a piece of paper, and on a computer monitor, the retina adjusts for the difference in the white point, not the brain.

In other words, I somewhat agree with Ms. Kimora ... the retina is an outgrowth of the brain. But then one could say that the eye itself is an outgrowth of the brain. Or one could say that the brain is an outgrowth of the eye. I have heard one scientists describe the brain as really just "an overdeveloped optic nerve." :-)

We humans like to draw lines between things. "The eye ends here and the brain starts here." But nature isn't so discerning ... there is no hard division between the eye, the optic nerve, and the brain.

So, the answer is a bit of a "yes and no" ... I would still say the answer is "no", but only because of the rather artificial (human-imposed) definition of the word "brain."

Answer 3

Indeed the eye’s retina and optic nerve are a part of the brain: during early development, a small part of the brain pouches out and becomes the retina and optic nerve.

Answer 4

The retina is part of the brain. In my anatomy and physiology of the eye class in college my favorite professor was very fond of telling us how exciting it was to "look into someones eye and see a funtioning portion of the brain. It is the only place it can be viewed without surgical intervention"

The retina is actually a piece of the brain that grows and develops into the eye.This allows the ganglion cells to carry information when the eye detects light.

Answer 5

No, the retina is part of the eye. The eye focuses light on the retina to trigger to brain to capture the picture.

Answer 6

I don't think the optic nerve that connects the Retina to the brain would classify the retina as part of the brain. The Retina is along the inside back wall of your eyeball with the optic nerve connecting it to the brain. So, no, the retina is not part of the brain.

Answer 7

People, DON'T BE IGNORANT, the retina is part of the brain.

Developmentally it is an outgrowth of the brain. The neurons of the retina extend back into the brain. Period.

Just because doctors define the brain as "that stuff inside your skull" doesn't mean squat.

Answer 8

The retina is part of the brain It is a thin layer of neural cells that lines the back of the eyeball of vertebrates and some cephalopods. In vertebrate embryonic development, the retina and the optic nerve originate as outgrowth of the developing brain. The vertebrate retina contains photoreceptor cells (rods and cones) that responds to light, the resulting neural signal then undergo complex processing by other neurons of the retina.

Answer 9

The brain is located within the cranial cavity - the retina is not, so it's not part of the brain. However, developmentally, it does grow out of the brain, so it is considered part of the central nervous system.

Answer 10

no the retina is in the eye. it the the innermost sclera layer full of light receptor cells