Center surround detection explained?

In summary, the conversation discusses the process of human vision processing and whether it is synchronous or asynchronous. The term 'Center Surround Detection' is mentioned as a part of this process. The individual then tries to research this term but is unable to find relevant results. They ask for an explanation or a link to a simpler explanation. A Wikipedia link is provided, which explains that within the retina, a ganglion cell is activated when the photoreceptors in its center area are activated, and inhibited when the surrounding photoreceptors are activated. This allows for a sharper response to small areas of illumination and can act as line detectors.
  • #1
sazr
8
0
A while back I asked about human vision processing and if it is performed synchronously or asynchronously. One of the responses mentioned that the retina performs 'Center Surround Detection'. So I tried to google what this is but no relevant results came up.

Is anyone able to explain what this is and how its useful or point me to a link that explains it (that is not too high level/hard to understand)?
 
Biology news on Phys.org
  • #2
Here is a wikipedia link I found googling center surround. Go to the retinal ganglion cells section.
The same search page showed links to several youtube videos on the subject.

Within the retina, a ganglion cell will be activated when the photorecptors it receives inputs from are activated if they are in the center area of the receptive field. Activation of photoreceptor in the surround area of the receptive field will inhibit the retinal ganglion cell (RGC).
This makes a sharper response to small areas of illumination. A linear array of these center surround receptive fields will then be able to activate higher order cells (getting RGC inputs) which will act as line detectors.
 
  • Like
Likes jim mcnamara

1. What is center surround detection?

Center surround detection is a sensory process in which the brain interprets visual information by comparing the activity of neurons in the center of the visual field to those in the surrounding areas. This process allows for the detection of contrast and edges in visual stimuli.

2. How does center surround detection work?

Center surround detection occurs in the retina of the eye, where specialized cells called ganglion cells receive visual information from photoreceptor cells. These ganglion cells have a center and a surrounding receptive field, which allows them to compare the activity of neurons in the center to those in the surrounding area and detect differences in contrast and edges.

3. What is the purpose of center surround detection?

The purpose of center surround detection is to enhance the perception of contrast and edges in visual stimuli. This process helps the brain to better interpret visual information and make sense of the surrounding environment.

4. What are the benefits of center surround detection?

Center surround detection has several benefits, including improving visual acuity and aiding in depth perception. It also helps to filter out irrelevant information and focus on important visual details, which can be crucial for survival in certain situations.

5. How is center surround detection related to visual illusions?

Center surround detection plays a role in many visual illusions, as it can be influenced by factors such as context and expectations. Illusions occur when the brain misinterprets visual information, often due to conflicting signals from the center and surrounding areas. Understanding center surround detection can help explain the mechanisms behind many visual illusions.

Similar threads

Replies
2
Views
995
Replies
8
Views
777
  • Computing and Technology
Replies
2
Views
495
Replies
10
Views
1K
  • Nuclear Engineering
Replies
2
Views
1K
Replies
1
Views
1K
  • Biology and Medical
Replies
13
Views
3K
  • Astronomy and Astrophysics
Replies
25
Views
1K
Replies
1
Views
1K
Back
Top