Perception - Perception 12:38...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Perception 12:38 Transduction of light into nerve impulses Receptors have outer segments which contain o Visual pigment molecules which have two components Retinal Light sensitive Becomes erect when light is present Anchored on opsin molecules Opsin o Once one visual pigment molecule is stimulated, an enzyme cascade  (chain reaction) is triggered throughout about a thousand more molecules  in the brain Retinal processing Rods o Large and cylindrical o Peripheral retina consists mostly of cones o 120 million rods Cones o Small and tapered o Fovea consists solely of cones o 5 million cones Blind spot o About 20 degrees towards the nasal lies a blind spot in the fovea o The image from one eye compensates and covers the blind spot of the  other one Measuring dark adaption o Experiments Person is light adapted
Background image of page 1

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

View Full DocumentRight Arrow Icon
Putting them in a dark room Light is turned off
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/10/2010 for the course PSYCH 333 taught by Professor Lydon during the Winter '10 term at McGill.

Page1 / 6

Perception - Perception 12:38...

This preview shows document pages 1 - 3. Sign up to view the full document.

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