What Is a Retinal Ganglion Cell?

Ganglion cell (ganglion cell) A nerve cell located in the final segment of the retina. Its axon is the optic nerve fiber. The fiber is distributed in the eyeball, distributed on the surface of the omentum, and collected in the optic tract (optic nerve) nipples. After the optic beam crosses, it stops at the lateral geniculate body. This ganglion cell's receiving area is roughly circular in various animals, and its center is illuminated with light. The peak discharge occurs at the beginning of the irradiation (on response); the periphery of the irradiation is after the termination of the irradiation (off response); When irradiated in the middle, two periods of light irradiation (on-off reaction) will occur. However, this property is not fixed. It varies greatly due to different animals, different wavelengths, and different light and shade adaptation conditions.

Ganglion cells

Ganglion cell (ganglion cell) A nerve cell located in the final segment of the retina. Its axon is the optic nerve fiber. The fiber is distributed in the eyeball, distributed on the surface of the omentum, and collected in the optic tract (optic nerve) nipples. After the optic beam crosses, it stops at the lateral geniculate body. This ganglion cell's receiving area is roughly circular in various animals, and its center is illuminated with light. The peak discharge occurs at the beginning of the irradiation (on response); the periphery of the irradiation is after the termination of the irradiation (off response); When irradiated in the middle, two periods of light irradiation (on-off reaction) will occur. However, this property is not fixed. It varies greatly due to different animals, different wavelengths, and different light and shade adaptation conditions.

Chinese name

Ganglion cells

Foreign name

ganglion cell

Location

Nerve cells in the final segment of the retina

Species

ON center type, OFF center type

Axe

Optic nerve fiber

Receiving area

Many animals are roughly round

Ganglia cell layer: It is located in the innermost layer of the retina. It is composed of multipolar ganglion cells. Its dendrites are mainly connected with bipolar cells, and can also be connected horizontally through podocytes; its axons extend to

There are several different types of ganglion cells that transmit brightness signals.

Two types of ganglion cells: ON center type, OFF center type

ON Ganglion cells ON center type

When a light spot is projected to the center of the receptive field, the release of such ganglion cells suddenly increases. (The area issued is a circle with the center of the field of view as the dot, this area is called the ON area); outside this small center, surround them

Ganglion cells

There is a circular range. In this area, if it is also stimulated with a small light spot, the opposite effect occurs. If the light spot falls completely on the circular area, the background emission is completely stopped. This area is called the OFF area. For this reason, ON-centered cells belong to the "light-giving type (light spots are issued to the center of the field of view and emit [ON]"). For ON-centric ganglion cells, the light energy that falls on the ON area See, the light falling (to) in the OFF area is invisible.

OFF Ganglia OFF-type

When the light spot is removed at the center of the receptive field, it will be strongly emitted. (The small circle area to be distributed is the ON area). Conversely, if the light is given in the center of the field of view, the distribution is stopped. Outside this small central circle area, there is a ring range around them. In this circular area, if the small light spot is removed, the distribution is stopped. This area is called the OFF area. For this reason, OFF-centered cells belong to the "light-removing type (removal of light spots in the center of the field of view and release, and stop emitting light [OFF]). For OFF-centric ganglion cells, Withdrawal of light in the ON area can be seen, withdrawn

Ganglion cells

The light walking in the OFF area is invisible. Similarly, the light falling in the ON area is invisible, and the light falling in the OFF area is visible.

The visual receptive field refers to a certain area or range on the omentum. When it is stimulated, it can activate the activities of the interstitial nerve cells in the visual system and this area. This area on the omentum is the receptive field of these nerve cells. The receptive field of a ganglion cell is only the area on the retina that is connected to it, and how much of a nerve node is connected to the retina, and its maximum receptive field is how large.