Receptive fields and central representations for seeing stuff

This one is technical asf sorry

What is the neural pathway for visual perception?

What is the neural pathway for visual perception?

Light, Eye, lateral geniculate nucleus, striate cortex and frontal lobe

What is the term for the neurological phenomena that links sensation to perception?

Receptive fields

True or false: a 1:1 ganglion cell to receptor network can perceive size

False

What needs to implemented to have a ganglion cell network that can perceive size?

multiple ganglion cells converging on one synapse

What happens to ganglion cell action potential rates when light hits the center of the receptive field?

Increases

What happens to ganglion cell action potential rates when light hits the periphery of the receptive field?

Decreases

What must we implement in our ganglion cell model to have size AND boundary perception?

Converging and inhibitory neurons

What is the name given to the model that shows how light sensitivity can be explained with receptive fields?

Herman Grid

What happens when you stimulate the center of an off-center receptive field?

Inhibitory response

What happens when you stimulate the periphery of an off-center receptive field

excitatory response

Describe a +Red -Green opponent channel as a receptive field

On center receptive field, M cones occupy the periphery and L cones occupy the center

What is the role of the Lateral geniculate nucleus in vision perception?

A relay center between the eyes and higher areas of the brain

What is the term given to the presence of a map-like structure showing the location of all retinal activity in the Lateral Geniculate nucleus?

Retinotopic mapping

What is the term given to the LGN transmission of visual information to the opposite hemispheres that each eye occupy respectively?

Contra-lateral networks

Why is it important that the visual networks of the brain are contra-lateral?

Aids with depth perception via ocular disparity

Name the cortex that chooses and sorts information in the LGN for top down processing?

Visual

What was the name of the two psychologists that proved the neural existence of receptive fields for object orientation in cats?

Hubel and Weisel

What is the name of the complex receptive field that deals with object orientation?

V1

Using on-centre receptive fields, describe a V1 field for representing vertical orientations?

On-center RF stacked on top of each other with peripheral areas overlapping

What can complex cell networks (like V1) do that simple networks (on-center RF) cannot?

Movement detection

What are the names of neurons that respond to corners of objects?

End-stopped cells

What elements of vision do the V2, V3, V4 and V5 complex receptive fields represent?

Depth, Motion, colour and direction

True or false, the primary visual cortex has specific areas for each Vx receptive field?

true

What are the two neural networks found in the higher level of the visual cortex?

Dorsal and Ventral streams

Which two other brain regions do the dorsal and ventral streams connect to?

dorsal is parietal and ventral is temporal

What is another term for the Vx complex receptive fields?

Stimulus modality

True or false: each Vx stimulus modality only executes the function it is related to (i.e. V5 only does direction)

False