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Name 3 biological factors in depression
- Cortisol Hypothesis
- Serotonin Hypothesis
- Genetics
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Cortisol Hypothesis - evidence
- Fernald and Gunnar
- Mexican children of depressed mothers living in poverty produce less cortisol, indicating stress system is worn out
- High depression prevalence among people with Cushing's disease - which results in excessive production of cortisol
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Genetics depression
- Nurnberger and Gershon - MZ twins higher concordnace rates than DZ twins
- Duenwald - Particular gene plays a role in serotonin pathways
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Neurotransmission hypothesis - evidence
- SSRIs
- Janowsky et al - fed patients a drug that made them depressed. Shows that mood can by chemically altered
- Others studies generally point to imbalance of neurotransission
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Cognitive etiologies of depression
- Cognitive triad
- Faulty thinking
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Beck's cognitive triad
- Dichotomous thinking
- Non-logical inference
- Overgeneralisation
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Study for cog depression
- Alloy et al - followed group of young Americans, after classifying them into two thinking styles
- The positive group - almost none contracted depression
- Negative group, 17% contracted depression
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SC factors in depression
- Life events
- Symptoms different in different cultures
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Life events depression
- Brown and Harris - 29/32 depressed women had experienced severe life events
- 78% of those who experienced life events DID NOT get depression
- Life events include:
- No outside employment
- Absence of social support
- Several young children at home
- Loss of mother at early age
- History of childhood abuse
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PTSD prevalence
- 5% men, 10% women
- 3% personal attack, 20% wounded vets, 50% rape victims
- 15-24% of those who experience traumatic event
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PTSD biological etiologies
- Genetic - some research points to a predisposition
- Noradrenaline - Geracioti found more patients had higher levels of noradrenaline
- Stimulating adrenal glands produced marked flashbacks and panic attacks in PTSD sufferers
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PTSD Cognitive etiologies
- Tend to believe they have a lack of control over lives
- Sutker et al. found that vets with a sense of purpose had less chance of experiencing PTSD
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Drug therapy depression
- Kirsch and Sapirstein - lit review of prozac, 25% more effective than placebo,
- Elkin et al. all treatments equally effective, except placebo group. Drug therapy faster
- Kirsch et al - no more effective than placebo
- Blumenthal - exercise in elderly patients as good as SSRI
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CBT Depression
- Aims:
- Correct faulty thinking
- Increase activities
- Elkin again
- Riggs - adolescents with substance abuse. Treatment with CBT and placebo almost as good as CBT and drugs.
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Depression group therapy
Toseland and Sipori - lit review. 3/4 cases, group as good as individual, 1/4, better than
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PTSD therapy
Foa - CBT. Focuses on reliving experiences in safe environment. HOWEVER, patients may be worse in initial phases
Weine group therapy
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