CHAPTER 7 | BIOPSYCHOLOGY AND ABNORMAL BEHAVIOR Flashcards
(34 cards)
Persistent use despite harmful consequences, involves both behavioral habits and biological changes
Addiction (Substance Use Disorder)
Central in reward and reinforcement; target of dopamine release.
Nucleus accumbens
DRUG MECHANISMS: Enhance neurotransmitter activity.
Agonists
DRUG MECHANISMS: Block neurotransmitter activity.
Antagonists
DRUG MECHANISMS: Strength of binding to receptor.
Affinity
DRUG MECHANISMS: Ability to activate the receptor.
Efficacy
plays a strong role (especially for early onset alcoholism).
Genetic predisposition
- antagonizes the enzyme that metabolizes
acetaldehyde
Disulfiram (Antabuse)
- block opiate receptors, decreasing pleasure from alcohol
Naloxone (Revia) and Naltrexone
addictive, artificial substance developed in the 1800s as a safer alternative for morphine
Heroin (medication for opiate abuse)
- stimulates same brain receptors and produces same effects as heroin and morphine
- gradually enters the blood and the brain with its effects rising slowly and avoiding the experience of “rush” that disrupts behavior
Methadone (medication for opiate abuse)
Buprenorphine and Levomethadyle Acetate
(LAAM) (medication for opiate abuse)
do not end the addiction but satisfy the craving in a less dangerous manner
- Symptoms: Sadness, hopelessness, anhedonia, fatigue, cognitive impairment.
- Genetics: Moderate heritability, interaction with environmental stressors.
- Hemisphere activity:
↓ Left prefrontal activity (positive mood).
↑ Right prefrontal activity (negative mood)
MAJOR DEPRESSIVE DISORDER
Block serotonin, norepinephrine reuptake (with side effects).
Tricyclics
Monoamine Oxidase Inhibitors (MAOIs)
Block monoamine oxidase, increasing neurotransmitter availability
Selective Serotonin Reuptake Inhibitors (SSRIs)
Specific to serotonin (e.g., Prozac).
activated by the reduction in sunlight, episodes of depression and lethargy typically recur
during particular seasons.
Seasonal Affective Disorder (SAD)
underactivity of serotonergic and noradrenergic
synapses
Monoamine Theory of Depression
experienced by some women during pregnancy,
after they give birth, or both
Peripartum Depression
decrease of neuroplastic processes in various
brain structures leading to loss of neuron and other neural pathology
Neuroplasticity Theory of Depression
first antidepressant drug, originally marketed to treat tuberculosis
Iproniazid
non-invasive delivery of repetitive magnetic
pulses at either high or low frequencies to specific cortical areas (prefrontal cortex)
Repetitive Transcranial Magnetic Stimulation
an implanted
electrode of the white matter of the anterior
cingulate gyrus in the medial prefrontal cortex, continual pulses of electrical stimulation
Deep Brain Stimulation
manic-depressive disorder, alternating between two poles: depression and mania
BIPOLAR DISORDER