Notes

← Back to home

A collection of fragments of understanding in the pursuit of deeper questions.

Receptive Fields of LGN Neurons

M-cells and Ganglion cells show very similar receptive fields. Approximately 50% of these cells have an on-center, where the cell strongly responds to an increase of light intensity. While the other 50% shows off-center, where the cell strongly responds to a decrease in light intensity. This type of receptive field is great to detect contrast. P-cells also have round receptive fields, but rather than discriminating light intensity, they discriminate between middle and long wavelengths. Furthermore, the size of the centers of the receptive fields changes depending on the location of the cell in the retina. Finally, K-cells show again round receptive fields which distinguish among short wavelengths.

image108