Hoofdstuk 7 Flashcards
Psycho active effects
alter a person’s mood/cognition/behavior
Addiction
a condition, produced by repeated consumption of a natural or synthetic psychoactive substance, in which the person has become physically and psychologically dependent on the substance
Physical Dependence
2 characteristics:
1) Tolerance - body increasingly adapts requiring larger doses for the same effect
2) Withdrawal -unpleasant physical & psychological symptoms when stopping
Psychological Dependence
is a state in which a person feels compelled to use a substance for the effect without necessarily physical dependence
Dependence and Abuse develop partly
because users rely increasingly on the substance to regulate their cognitive and emotional states
- na positieve/negatieve reinforcement: people are at risk if their brain reaction to reward reflects strong pleasure
Withdrawal Syndrome (alcohol)
Delirium Tremense
- intense anxiety
- tremors
- frightening hallucinations when their blood alcohol levels drop
Cues
associations by way of classical conditioning
2 important responses: Attention + Craving
- the role of cues in substance dependence involves physiological mechanisms:
1) learning the cues enables the body to anticipate and compensate for substance’s effects
2) Incentive-Sensitization Theory of Addiction: dopamine enhances the salience of stimuli associated with substance use so that they become increasingly powerful in directing behavior
Cues grab attention, arouse anticipation of reward and lead the person to use
Psychosocial factors provide the primary forces that lead adolescents to begin smoking
- reinforcement important factor in continuation
- area of the brain (insula) may control the desire to smoke
Carcinogen
substance that causes cancer
- Nicotine constricts blood vessels and increases heart rate, cardiac output and both systolic and diastolic blood pressure
- carbon monoxide reduces the availability of oxygen to the heart which may cause damage and lead to atherosclerosis
Emphysema + Chronic Bronchitis
= COPD (Chronic Obstructive Pulmonary Disease)
CLRD (Chronic Lower Respiratory Disease)
Lifetime Prevalence Rate (alcohol)
estimates have been made on the basis of the proportion of individuals at a given time who had ever displayed the problem
Fetal Alcohol Syndrome
- impaired nervous system development
- cognitive + physical defects
Consuming alcohol impairs cognitive, perceptual and motor performances for several hours
zeker eerste 2/3 uur
Cirrhosis
heavy drinking over a long period of time causes liver cells to die off and be replaced by permanent, non-functional scar tissue
(liver less able to cleanse blood + regulate its composition)
- the more you drink = higher blood pressure
- brain damage = impaired perception + memory
3 types of drugs are exceptions to the pattern of usage beginning in adolescence
tranquilizers
barbiturates
painkillers (eg Oxycontin)
- all begin in adulthood
- minority teens are less likely to use drugs if they have a strong racial and ethnic identity