What is the sequence of the visual pathway?

What is the sequence of the visual pathway?

The primary visual pathway consists of the retina, optic nerve, lateral geniculate nucleus (LGN) of the thalamus, and the visual cortex of occipital lobe. Each of these structures function in sequence to transform the visual signal, leading to our visual perception of the external world.

Where does the visual pathway begin?

the retina
The optic pathway begins in the retina, which is a complex structure made up of ten different layers. Each layer serves a distinct function. The photoreceptor layers consist of the rods and cones, which generate action potentials with the help of rhodopsin through photosensitive cycles.

What is the pathway that light travels through the eye?

Light passes through the front of the eye (cornea) to the lens. The cornea and the lens help to focus the light rays onto the back of the eye (retina). The cells in the retina absorb and convert the light to electrochemical impulses which are transferred along the optic nerve and then to the brain.

What is the dorsal visual pathway?

Definition. The dorsal visual pathway is a functional stream originating in primary visual cortex and terminating in the superior parietal lobule that is responsible for the localization of objects in space and for action-oriented behaviors that depend on the perception of space.

What are the dorsal and ventral visual pathways?

From their model, the ventral stream processes visual information for the purpose of visual perception (“vision for perception”), while the dorsal stream processes visual information for the purpose of executing movements (“vision for action”).

What is the correct order of light passage in the eyeball?

Some of this light enters the eye through an opening called the pupil (PYOO-pul). The iris (the colored part of the eye) controls how much light the pupil lets in. Next, light passes through the lens (a clear inner part of the eye). The lens works together with the cornea to focus light correctly on the retina.

What is the pathway of light through the eye and to the visual cortex?

The projection from the LGN to the visual cortex is called the optic radiation. Because damage at any point along the pathway from the retina to the cortex results in some degree of blindness, this is clearly the pathway through which conscious visual perception takes place in human beings.

Where is the ventral pathway?

The ventral pathway was described as coursing through the occipitotemporal cortex to the anterior part of the inferior temporal gyrus (area TE)[1, 2], with a likely extension into the ventrolateral prefrontal cortex (VLPFC/area FDv)[3].

What is the correct order of how light passes through the eye?

From the cornea, the light passes through the pupil. The iris, or the colored part of your eye, controls the amount of light passing through. From there, it then hits the lens. This is the clear structure inside the eye that focuses light rays onto the retina.

What are L and M cones?

There are three types of cones: – Red cones, accounting for 64% of the total, also known as L-cones (maximally sensitive to long-wave light). – Green cones, accounting for 32% of the total, also known as M-cones (maximally sensitive to medium-wave light).