the statistics on sanity are that one out of every four americans is suffering from some form of...
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The statistics on sanity are that one out of every four
Americans is suffering from some form of mental
illness. Think of your three best friends. If they're
okay, then it's you. ~Rita Mae Brown
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IntroductionMajor Depressive Disorder
PathophysiologySchizophrenia
PathophysiologyPost-traumatic Stress Disorder
(PTSD) Pathophysiology
Conclusions
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Affective Disorder = Mood Disorder Depressive Disorders Bipolar Disorders Substance-Abuse Mood Disorders
Too simplistic need to look deeper Co-morbid common
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Affective Spectrum Disorder: group of conditions that do not fit the major, well-established categories Overlapping manifestations around
affective disregulation Mainly characterized by depression,
dysphoria, severe personality disorders, or combination
Hereditary linksComprehensive Psychiatry; Vol 26; 1987
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Depressive disorders Bipolar disorders Substance-induced
mood disorders Attention-deficit/
hyperactivity disorder (ADHD)
Bulimia nervosa Cataplexy Dysthymic Disorder Schizophrenia Schizoaffective
disorders Social phobias
Fibromyalgia Generalized anxiety
disorder Irritable bowel
syndrome Migraines Obsessive-compulsive
disorder (OCD) Panic disorder Posttraumatic stress
disorder (PTSD) Premenstrual
dysphoric disorder Some personality
disorders (e.g. BPD)Arch Gen Psychiatry, Vol 60; Feb 2003.
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Characteristics 1 in 5 Multiple episodes
common Co-morbidity VERY
common Neurobiology
traditionally focused on monoamines ”Monoamine Hypothesis” 5-HT NE
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Previous studies on MDD already depressed 5HT studies
BDNF HPA axis and
stress CRF DA
CMAJ, Vol 180; Feb 3, 2009
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Structural changes Abnormal brain
activation
CMAJ, Vol 180; Feb 3, 2009
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CharacteristicsSymptoms
3 CategoriesAffects 0.5% to 1% of world pop.Neurobiology reveals an increase in
DA mesolimbic pathway Environment, genetics/heritability, and
social interactions factor
JCI, Vol 119; April 2009.
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“The Dopamine Hypothesis” DA receptors and brain
regions Version I vs. Version II
“The Neurodevelopment Hypothesis” Pathological brain
development Structural changes in
different brain regionsSchizophrenia Bulletin, Vol 35; 2009
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CharacteristicsSymptoms8% of population; 5.2 mil in a given
yrReflect stress-induced changes in
neurobiological systems Inadequate adaptation to stressors
National Center for PTSD; http://ncptsd.va.gov
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Regulation of fear and stress response HPA axis NTs/NPs Brain regions▪ PFC▪ Amygdala▪ Hippocampus▪ Brainstem nuclei
CNS Spectrum, Vol 14; Jan 2009
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DynamicCo-morbidSimilarities
NTs Brain regions Mechanisms
“Tip of the iceberg”
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"Insanity is doing the same thing over and
over again and expecting a different
result."Albert Einstein