Chapter 13 - Chapter13 LearningandMemory BasicMechanisms...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
    Chapter 13 Learning and Memory: Basic Mechanisms
Background image of page 1

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

View Full DocumentRight Arrow Icon
    The nature of learning Learning refers to the processes by which experiences change  our nervous system and hence our behavior We refer to these changes as memories Experiences are not “stored”, rather they change the way we  perform, perceive, think, and plan by physically changing the  structure of the nervous system We must be able to learn in order to adapt our behaviors to our  changing environment
Background image of page 2
    The nature of learning 4 basic forms of learning: Perceptual learning  – ability to learn to recognize stimuli that have  been perceived before; enables us to identify and categorize  objects; primarily accomplished by changes in the  sensory  association cortex Stimulus-response learning  – ability to learn to perform a particular  behavior when a particular stimulus is present; involves  establishment of connections between circuits involved in  perception and those involved in movement Two types:  classical conditioning – when a stimulus that initially produces no particular  response (e.g. bell) is followed several times by an unconditioned stimulus   (e.g. shock) that produces a defensive or appetitive response (the  unconditioned response ), the first stimulus (now called conditioned  stimulus ) itself evokes the response (now the conditioned response ) Operant conditioning (see slide 5)
Background image of page 3

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

View Full DocumentRight Arrow Icon
    The nature of learning How does classical  conditioning work in the  brain? Hebb rule  – the cellular basis  of learning involves  strengthening of a synapse  that is repeatedly active  when the postsynaptic  neuron fires “Cells that fire together, wire  together”
Background image of page 4
    The nature of learning Whereas classical conditioning involves an association between   two stimuli, operant conditioning  involves an association  between a response and a stimulus It permits an organism to adjust its behavior according to the  consequences of that behavior  Reinforcing stimulus  – an appetitive stimulus (e.g. food, water) that  follows a particular behavior (e.g. lever press) and thus makes the  behavior become more frequent Punishing stimulus  – an aversive stimulus (e.g. shock) that follows  a particular behavior (e.g. lever press) and thus makes the behavior  become less frequent
Background image of page 5

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

View Full DocumentRight Arrow Icon
   
Background image of page 6
    The nature of learning Motor learning A component of S-R learning Learning to make a new response The more novel the behavior, the more the neural circuits in the  nervous system must be modified
Background image of page 7

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

View Full DocumentRight Arrow Icon
    Learning types summary
Background image of page 8
    Learning and synaptic  plasticity Synaptic plasticity  – changes in the structure or biochemistry of 
Background image of page 9

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

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/31/2011 for the course PSB 3004 taught by Professor Williams during the Spring '08 term at University of Florida.

Page1 / 25

Chapter 13 - Chapter13 LearningandMemory BasicMechanisms...

This preview shows document pages 1 - 10. Sign up to view the full document.

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