7 - PSY308 Biopsychology Drug actions Overview Some Basic...

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

View Full Document Right Arrow Icon
PSY308 Biopsychology Drug actions
Background image of page 1

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

View Full DocumentRight Arrow Icon
Some Basic Concepts and Definitions Psychoactive Drugs Tolerance Sensitization Withdrawal Syndromes Physical dependency Addiction Psychoactive drugs Classification Actions Mechanisms Overview
Background image of page 2
Any chemical substance that alters mood or behavior as a result of alterations in the functioning of the brain Psychoactive Drugs
Background image of page 3

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

View Full DocumentRight Arrow Icon
Tolerance Decreased sensitivity to the effects of drug as a result of exposure
Background image of page 4
Sensitization Increased sensitivity to the effects of drug as a result of exposure
Background image of page 5

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

View Full DocumentRight Arrow Icon
Common mechanisms -Increased Breakdown *“Metabolic Tolerance”, drug broken down faster - Neuronal Adaptation = MOST common *“Functional Tolerance”, brain adapts to changes and develops responses to compensate Tolerance Conditioned Drug Tolerance = based on environment (situation specific drug tolerance)
Background image of page 6
Conditioned drug tolerance Hypothermia effects of alcohol in rats First alcohol injection 21 st alcohol injection
Background image of page 7

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

View Full DocumentRight Arrow Icon
Addiction (one definition) habitual drug use with adverse social and/or health effects that resists attempts to stop the drug use Physical dependency the onset of withdrawal syndromes upon removal of the drug Withdrawal syndromes Adverse physiological reaction Opposite to the initial effects of the drug
Background image of page 8
Pleasure center Natural reward food, water, sex Self-administration e.g., Cocaine, Amphetamine, & morphine
Background image of page 9

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

View Full DocumentRight Arrow Icon
Self-administration into the nucleus accumbens Self-administration with the intact nucleus accumbens NO Self-administration without the nucleus accumbens
Background image of page 10
A. Sedative-Hypnotics (aka CNS depressants)
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 note was uploaded on 02/28/2010 for the course PSY 43790 taught by Professor Lee during the Spring '10 term at University of Texas.

Page1 / 28

7 - PSY308 Biopsychology Drug actions Overview Some Basic...

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