University:
Binghamton University
Course:
BIOL 313 | Cellular Neurobiology
Academic year:

2024
Views:

447

Pages:

1
Author:

CrystalMintah

Cellular Neurobiology BIOL 313 November 11th, 2024: "Visual Information Processing in the Primary Visual Cortex: Structure, Function, and Organization" LGN output is center-surround (matching its input as an off or on) but has been processed to sort by eye, location, sensitivity to or motion, etc. a. Output = visual cortex in the occipital lobe ii. The first step is the primary visual cortex - V! ii. About 2mm thick, organized in 6 layers in V1 iii. All layers have topographic maps with the fovea occupying much of it iv. Maps are stacked so the same locations are on top of each other in each layer v. Inputs from LGN all project to layer 4 b. Magnocellular cells c. The parvocellular cell of LGN project to other sublayers, continuing to provide color, form information The visual cortex contains the simple cell a. Simple cells located within layer 4, receiving inputs from the LGN b. Have center/surround receptive fields that can be “on” or “off” responses depending on their inputs c. The shape of these cells' receptive fields can be different - A bar for the center, surrounded is bars on either side Inputs to make this —------- Lined up at the LGN - Center surround receptive fields to cover a bar-shaped area - Can make bars of different orientations (horizontal or vertical)