The Retina has layers of cells

Slides:

Advertisements

Similar presentations

Chapter 4: The Visual Cortex and Beyond

Advertisements

Chapter 6 Vision. Sensation and Perception: Important Vocabulary Terms Sensation is the process of receiving, transducing, and coding stimulus energy.

Visual Sensation & Perception How do we see?. Structure of the eye.

The eye – curved cornea – lens – retina – fovea – optic disk Using Light.

Perception of Stimuli Stephen Taylor.

Parts of the Eye - Pupil.

Sensation Overview How is perception different from sensation? What is psychophysics? What do sense organs do? How does vision work? How does this compare.

Exam in 12 days in class assortment of question types including written answers.

Midterm 1 was returned in this class -mean was “a little to low” - for future, Moodle will have an Open Discussion Forum for this class to catalyze engagement.

Blue= rods Green = Cones Pathways from the Retina In the brain, retinal ganglion axons travel to… –the hypothalamus: control bodily rhythms.

Exam 1 week from today in class assortment of question types including written answers.

Multiple Choice Yes/No and True/False and Matching Study the lecture notes, textbook My office hours are after class (NOTE: I won’t talk about the test.

Visual System: Overview of Visual Pathway.

Meet the Profs event Thursday Sept. 23 at 4:30 in AH117.

The Visual System. Figure 6.1 A cross-sectional view of the human eye Klein/Thorne: Biological Psychology © 2007 by Worth Publishers.

Color vision Different cone photoreceptors have opsin molecules which are differentially sensitive to certain wavelengths of light – these are the physical.

The Eye. A Model for Sensing  Three components: Stimulus detection – a specialized sensory neuron Reception – where neurons receive information from.

The Human Visual System Vonikakis Vasilios, Antonios Gasteratos Democritus University of Thrace

Ch 31 Sensation & Perception Ch. 3: Vision © Takashi Yamauchi (Dept. of Psychology, Texas A&M University) Main topics –convergence –Inhibition, lateral.

The visual system Lecture 1: Structure of the eye

Ganglion cells project to the brain via the optic nerve information is projected to contralateral cortex! Visual Pathways.

Vision is more than what we see.. Karl Lashley American Psychologist Memory storage Migraine Headaches.

University Studies 15A: Consciousness I The Neurobiology of Vision.

Vision. Light is electromagnetic energy. One nm = one billionth of a meter The Visible Spectrum.

Vision By: Bethany, Iqra, Clint, Cameron, Nick. The Process Light enters eye through the cornea Then, it goes through the pupil which is surrounded by.

Vision Biology/Psychology Some introductory thoughts Sensory world in general is basically a representation of the real world So, we have a rich.

With respect to STM, grouping several items together to form a single larger item is called: A.BlockingB.Lumping C.ChunkingD.Grouping Electrochemical.

Olfactory bulb receives input from olfactory receptors which contact mucus in nasal cavity Smell.

1 Computational Vision CSCI 363, Fall 2012 Lecture 3 Neurons Central Visual Pathways See Reading Assignment on "Assignments page"

Copyright © 2009 Allyn & Bacon

1 Perception, Illusion and VR HNRS , Spring 2008 Lecture 3 The Eye.

THE VISUAL SYSTEM: EYE TO CORTEX Outline 1. The Eyes a. Structure b. Accommodation c. Binocular Disparity 2. The Retina a. Structure b. Completion c. Cone.

15 1 Grossberg Network Biological Motivation: Vision Eyeball and Retina.

Myers EXPLORING PSYCHOLOGY Module 14 Introduction to Sensation and Perception: Vision James A. McCubbin, PhD Clemson University Worth Publishers.

Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 10 Sensory Physiology 10-1.

Can humans or non-human animals see in the dark?.

The Visual Pathway Sensory Systems What is a Sensory System? –Window to the physical energies of the external environment. –Gives rise to sensory perceptions.

Ch 31 Sensation & Perception Ch. 3: Vision © Takashi Yamauchi (Dept. of Psychology, Texas A&M University) Main topics –convergence –Inhibition, lateral.

The Visual System: Retinal Mechanisms

Vision Psychology Some introductory thoughts Sensory world in general is basically a representation of the real world Sensory world in general is.

Psychology 210 Lecture 4 Kevin R Smith. Vision Sensory System –The eye –Exactly what we sense from our environment Perceptual System –The brain –How we.

1 Computational Vision CSCI 363, Fall 2012 Lecture 5 The Retina.

Vision  Transduction  conversion of one form of energy to another  in sensation, transforming of stimulus energies into neural impulses  Wavelength.

Option E: Neurobiology and Behavior. E.2.1 Outline the diversity of stimuli that can be detected by human sensory receptors, including mechanoreceptors,

Dr. Raj Patel OD - Vancouver Vision Clinic

Mind, Brain & Behavior Wednesday February 19, 2003.

1 Perception and VR MONT 104S, Fall 2008 Lecture 2 The Eye.

Mod 12 Quiz AP Psychology. Which of the following is not one of the parallel processes of vision?  A. degree  B. form  C. color  D. motion  E. depth.

Seeing READING ASSIGNMENT Discussion of Gregory’s Article on Visual Illusions – Tues Feb 17 Available in your course pack.

BOVINE EYE DISSECTION INTRO. Can humans or non-human animals see in the dark?

The Human Retina. Retina Function To detect movement To detect color To detect detail.

Perception of stimuli Option A.3. Receptors detect changes in the environment. List and describe the types of specialized receptors in humans. a. Mechanoreceptors-

Student : Chen–Fung Tsen Advisor : Sheng-Lung Huang.

1 Perception and VR MONT 104S, Spring 2008 Lecture 3 Central Visual Pathways.

Psychology 210 Lecture 4 Kevin R Smith.

THE VISUAL SYSTEM: ESSENTIALS OF SIGHT

Anatomy of the Human Eye

Ch 6: The Visual System pt 2

The Visual System: Retinal Mechanisms

VISION Retina: light-sensitive inner surface of the eye that contains the rods, cones and neurons that process visual stimuli Photoreceptors: neurons.

Aim: Students will be able to understand the structure and function of the eye Do Now: Take out your homework to submit (sensation and perception packet),

Option E: Neurobiology and Behavior

A.3 Perception of Stimuli

The Anatomy of Visual Sensation

Option E: Neurobiology and Behavior

Presentation transcript:

The Retina has layers of cells photoreceptors transduce incoming light ganglion cells send signals along to the brain

Two kinds of Photoreceptors 2 types of photoreceptors: rods and cones rods are very sensitive - useful in dim light cones are less sensitive but work even in very bright light

The Retina Rods and cones are distributed differently across the retina

The Retina visual acuity (ability to see detail) depends on cones - thus acuity varies across the visual field

The Retina Why don’t you notice your blind spot?

The Retina Why don’t you notice your blind spot? Blindspots don’t overlap! Your brain “fills in” the missing information The specific information in the blindspot isn’t much more missing than the rest of the periphery!

The Retina three types of cones: short, medium, and long different absorptions enable color vision

Neurons “collect” information each ganglion cell integrates information from a particular spot on the retina called its receptive field

Receptive Fields Stimulus is in receptive field Action potentials Stimulus is in receptive field Stimulus is near receptive field Stimulus is outside receptive field

Visual Pathways Ganglion cells project to the brain via the optic nerve information is projected to contralateral cortex!

Visual Pathways the retina is mapped onto primary visual cortex called a retinotopic or spatiotopic map Stimulus Cortical Activity

Visual Pathways signals are separated according to the type of information Dorsal “Where” Pathway: Motion and Location Primary Visual Cortex (V1) Ventral “What” Pathway: Color and Form

Seeing

Seeing Discussion of Gregory’s Article on Visual Illusions - Tuesday Oct 23

Seeing Seeing is the process of converting electromagnetic radiation into a conscious mental event

Seeing visual system faces many challenges too much information too little information conflicting information ambiguous information

Seeing too much information

Seeing too little information

Seeing Conflicting Information

Seeing Ambiguous information

Seeing We will consider two aspects of vision to explore how the brain overcomes these challenges: Seeing depth Seeing in color