Question

What type of ganglion cells respond to movement?

a. P Cells

b. M Cells

c. Amacrine Cells

d. Horizontal Cells

Answer 1

Answer - M Cells responds to movement.

Explanation - In the human retina, there are more than a million retinal ganglion cells. Ganglion cells are the neurons of the vertebrate retina and convey information to the brain from retinal neurons. It is associated with the processing of visual information. Light as a stimulus enters the eye and then travels to brain via axons. These exons make up the optic nerve. Ganglion cells collect information from bipolar cells and amacrine cells. Two major types of ganglion cells are P cells and M cells. M cells are located within the adina magnocellular layer and larger than P cells. M cells respond to stimulus more vigorously and senses motion, luminance and large patterns. P cells are located within the Parvocellular layers and small in size. P cells senses colour and fine patterns.

Horizontal cells and amacrine cells are interneurons and regulate the information flow from phtoreceptors to ganglion cells. Horizontal cells are responsible for the modulation of information flow from photoreceptors to bipolar cells in the outer plexiform layer (OPL). Whereas amacrine cells regulate the flow of information from bipolar cells to retinal ganglion cells in the inner plexiform layer (IPL).