PSYC 1000 Lecture Notes - Lecture 7: Temporal Lobe, Motion Perception, Depth Perception
27 Jun 2018
School
Department
Course
Professor
Module 28 sight
Cornea: transparent protective outer surface of the eye
Iris: the colored muscle surrounding the pupil, that controls the size of
the pupil.
Pupil: the small, black adjustable opening.
Sclera: white of the eye
Retina: specialized sheet of nerve cells in the back of the eye
containing the sensory receptors for vision.
Transduction: process the involves converting stimulus energy into
neural impulses that can be interpreted by the brain
Photoreceptors: sensory receptors cells for vision located in the retina
. Rods: photoreceptors most responsive levels of light in the retina,
cannot distinguish colours, night vision.
. Cones: photoreceptors responsive to colour, day vision, not as many
cones.
Fovea: centre of the retina containing only comes where vision is most
clear
Bipolar cells: transmits signals from the photoreceptors to ganglion
cells.
Ganglion cells: sends axon (signal to brain)
Horizontal cells: inhibits cells in adjacent to brain
Light through the eye
Light passes through the cornea (performs initial bending of light)
Passes through the pupil (controls the amount of light)
Passes through the lens (focuses (bends) light)
Projected onto the retina
. retina contains all the receptors cells (rods and cones)
. fovea: area in the center of retain having clearest image (most
cones)
seeing in colour:
hue: dominant perceive colour. Based on predominant wavelengths;
gree,blue,red.
Saturation: purity of colour; how vivid it is,
find more resources at oneclass.com
find more resources at oneclass.com
Brightness: related to intensity of light, how much light is reflected
from the object
Trichromatic theory: young and Helmholtz, based on mixing
experiments are eye much have three types of colour receptors
Colour deficiencies: result from deficiencies in one or more cone
system. Di-chromatics. Only having two types of cones
Opponent process theory: yellow seemed to be a primary colour,
Colour afterimages: if you stare at something blue, you see yellow
afterward and vice versa. If you stare at something green, red in
enhanced afterward. Vice versa
Cells of primary visual cortex.
Hubel and weasel.
Feature detectors: neurons in visual cortex respond to specific features
of a visual stimuli.
Simple cells. Cells respond to certain shapes
Complex cells: cells that respond to lines with specific angles
Beyond primary visual cortex.
“what” pathway- (temporal lobe) devoted to object recognition. Cells
respond only to particular complex stimuli
1visual agnosia- damage to the “what “pathway, cannot recognize
object
2prosopagnosia- a form of visual agnosia in which people cannot
recognize faces.
“where: pathway. Devoted to processing of movement, spatial
orientation.
1. Hemi-neglect. Damaged to the where pathway people ignore one
side of their visual field.
Retina display: the sight difference in images processed by the retinas
of each eye
convergence: inward movement of the eye to views object close to
oneself
Gestalt laws: identifies several organizational “laws” r principles used
by the brain during (top-down) perception of visual stimuli.
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Cornea: transparent protective outer surface of the eye. Iris: the colored muscle surrounding the pupil, that controls the size of the pupil. Retina: specialized sheet of nerve cells in the back of the eye containing the sensory receptors for vision. Transduction: process the involves converting stimulus energy into neural impulses that can be interpreted by the brain. Photoreceptors: sensory receptors cells for vision located in the retina. Rods: photoreceptors most responsive levels of light in the retina, cannot distinguish colours, night vision. Cones: photoreceptors responsive to colour, day vision, not as many cones. Fovea: centre of the retina containing only comes where vision is most clear. Bipolar cells: transmits signals from the photoreceptors to ganglion cells. Horizontal cells: inhibits cells in adjacent to brain. Light passes through the cornea (performs initial bending of light) Passes through the pupil (controls the amount of light)
