1activity of retinal gangion cells that have an excitatory center and an inhibitory surround to

1activity of retinal gangion cells that have an excitatory...

Activity of retinal ganglion cells that have an excitatory center and an inhibitory surround to their receptive field allows: A. the conscious awareness of objects B. the detection of color C. detection of contrast by responding to a border within the receptive field D. perception of depth Visual acuity is best in the center of our visual field. What is the best explanation for this? A. retinal ganglion cells in the fovea have a small receptive field receiving information from a single photoreceptor cell. B. retinal ganglion cells in the fovea have a large receptive field receiving information from many photoreceptor cells. C. photoreceptor cells in the fovea are mostly rods. D. photoreceptor cells in the fovea are mostly cones.

Transcript

0:00 Hello everyone.

00:01 So in this particular question, the first part of the question asks us that the activity of retinal ganglionic cells, they are excitatory.

00:09 They are having excitatory center as well as inhibitory that surround the receptive field.

00:15 So now what the excitatory center and the inhibitory that surround the receptive field, it allows dash.

00:22 So we need to fill in this plan.

00:24 Now the a part of the option is that the conscious awareness of object, b, the detection of color c, detection of contrast by responding to a border within the receptor field and d is the perception of there.

00:38 So first of all in this question we are talking about the ganglionic cells.

00:43 So whenever we are talking about the ganglionic cells, they are the final output neuron of a vertebrate retina.

00:53 So now talking about these ganglionic cells, they are having a receptive field and this receptive field it is fixed and it does not change its position so it is we can say almost about one m that is millimeter in diameter so this is the length of we can say receptive field that is present in the ganglionic cell and it is the most sensitive area of this ganglionic cell right we can say that receptive field is most sensitive right so even if you on the receptive field of a ganglionic cell even if we are giving a dim light it could it will make the cell respond but whereas if we are giving that dim light to the surrounding receptive field the other is the area and ganglionic cell other than the receptive field so we will not get any response for there we need a bright light right so you understand that what is the concept of the receptive field so from here only we can see.

02:01 So, from here only we can clearly make out that the main function of this receptive field that it will detect the contrast by responding to a border which is within the receptive field...

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