NPB+112+11+vision

NPB+112+11+vision - NPB 112, Winter 2011, 1/2/11-1/8/11...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
1 NPB 112, Winter 2011, 1/2/11-1/8/11 Vision (Ch. 11, 12) I. The eye (Ch. 11) II. Rods & Cones III. Phototransduction IV. On- and Off-center pathways V. Center-surround organization A. Center-surround antagonism and lateral inhibition B. m- and p-type retinal ganglion cells Fig. 11.1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Fig. 11.13 Animation of eye anatomy : http://www.sinauer.com/neuroscience4e/animations11.1.html Fig. 11.5
Background image of page 2
3 Fig. 11.5 Range of luminance values over which visual system operates Lowest levels of illumination: Rods only Starlight: Cones begin to contribute Bright light: Cones only Luminance (log cd/m -2 )
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Rods - high density throughout retina with sharp decline in fovea. Cones -low density with sharp peak in center of fovea. rod rhodopsin Blue (short, S) Red (long, L) Green (medium, M) Absorption spectra
Background image of page 4
5 What the world looks like to individuals with varying degrees of color blindness Structure of the Retina Ganglion cell layer Outer plexiform layer Outer nuclear layer Inner plexiform layer Inner nuclear layer Photoreceptor outer segments Pigment epithelium light
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 Fig. 11.9 (A)
Background image of page 6
7 Na+ Na+ Na+ Ca++ K+ K+ K+ neurotransmitter release stopped in light inner segment dark current Na+ cGMP Outer segment X X X X light
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8 http://www.sinauer.com/neuros cience4e/animations11.2.html Animation of phototransduction: Fig. 11.18 Relatively depolarized in dark Relatively hyperpolarized in dark light light Relatively depolarized in dark depolarized by light (disinhibited) Hyper- polarized by light light mGluR6; shut c-GMP-gated Na+ channels AMPA- depolarize cell glutamate
Background image of page 8
9 On-center bipolar cells On-center ganglion cell Horizontal cell Inhibitory surround Excitatory center
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
10 X disinhibited
Background image of page 10
11 Fig. 11.17 Animation of center-surround antagonism: http://www.sinauer.com/neuroscience4e/animations11.3.html
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 03/26/2011.

Page1 / 31

NPB+112+11+vision - NPB 112, Winter 2011, 1/2/11-1/8/11...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online