Neuron Neurons Purkinje cells from cerebellum, dendrites showing calcium concentration.

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Presentation transcript:

Neuron

Neurons Purkinje cells from cerebellum, dendrites showing calcium concentration

Synaptic connection

Eye

Neural circuitry of the retina

Receptors Density - Fovea

Photoreceptors

CCD Well

Image Capture Huge dynamic range Photons: poisson process. Noisy at low levels For low light: large receptors, slow integration Rods/cones, local adaptation,change of amplitude and time constant, motion deblur

Visual receptor types

Spectral sensitivity

Color Mixing

Center-surround Receptive Fields Modified from PSY280F

LGN Layers

Physiological Recording

Orientation Selectivity

V1: Direction selectivity Modified from PSY280F

End-stopped cell

Simple Cells

Visual Areas

Bi-directional Computation

fMRI Magnet

fMRI Activation Slice

fMRI Activation

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