What is the receptive field of the eye?

What is the receptive field of the eye?

Each of the neurons in the various layers of the retina “covers” an area in your field of vision. This area in space where the presence of an appropriate stimulus will modify the activity of this neuron is called the receptive field of this neuron.

What is the receptive field of a visual neuron?

The receptive field is often identified as the region of the retina where the action of light alters the firing of the neuron.

What do amacrine and horizontal cells do?

Horizontal Cells and amacrine cells perform intermediate and lateral processing by integrating information at the bipolar and ganglion cell layers, respectively. The rods and cones send their impulses to the bipolar cells. Horizontal cells at this level allow for lateral communication between the rods and cones.

What are the receptive fields of retinal ganglion cells?

The classical receptive field of a ganglion cell is defined as the area of the retina where stimulation with a small spot of light produces a change in ganglion cell firing rate.

Which has the largest receptive field?

Retinal ganglion cells located at the center of vision, in the fovea, have the smallest receptive fields and those located in the visual periphery have the largest receptive fields.

What is the relationship between a receptive field and reception?

Sensory transduction is the process of converting that sensory signal to an electrical signal in the sensory neuron. The process of reception is dependent on the stimuli itself, the type of receptor, receptor specificity, and the receptive field, which can vary depending on the receptor type.

What is the purpose of horizontal cells?

Horizontal cells receive excitatory input from photoreceptors and provide feedback inhibition to photoreceptors and feedforward inhibition to bipolar cells.

What are horizontal cells responsible for?

They help integrate and regulate the input from multiple photoreceptor cells. Among their functions, horizontal cells are responsible for allowing eyes to adjust to see well under both bright and dim light conditions.

Which body part should have the smallest receptive field?

The fingertips have the smallest receptive fields. This is because they have the greatest density of receptor, and also the greatest sensory acuity compared to other areas of the body.

What determines the size of a receptive field?

The receptive field size of neurons in primary visual cortex depends strongly on the stimulus contrast. The size can be more than two times larger when measured with low contrast stimuli than when measured with high contrast stimuli.

What happens in the center of the receptive field?

The center of the receptive field is a result of direct innervation between the photoreceptors, bipolar cells, and ganglion cells. If a light spot covers the center of the receptive field, the ON bipolar cell would depolarize, as discussed above; the light hits the photoreceptor, it hyperpolarizes, decreasing glutamate release.

What kind of light does a photoreceptor receive?

Photoreceptor cells at the lowest level receive light from only a small patch in the visual field. That patch defines the photoreceptor’s receptive field. The photoreceptors report what they see to the next level of the retina, which is composed of bipolar, horizontal, and amacrine cells.

Which is part of the retina has a receptive field?

The photoreceptors report what they see to the next level of the retina, which is composed of bipolar, horizontal, and amacrine cells. Lateral connections from the horizontal and amacrine cells give the bipolar cells a receptive field shaped like two concentric discs.

What are the two types of receptive fields?

Receptive field subregions: The area within the receptive field is subdivided into two regions, center and surround. There are two primary types of ganglion cell receptive fields: ON center/OFF surround cell: Flashing small bright spot in the center subregion increases the cell’s response.