Chapter 4 - Emotion, Stress, Motivation, and Addiction Flashcards
James-Lange Theory
physiological arousal and behavioral response precede the experience of an emotion
Cannon-Bard Theory
physiological response and conscious awareness of the emotion are both experienced simultaneously
Schachter-Singer Theory (Two-Factor Theory)
cognitive evaluation of one’s physiological arousal results in the experience of an emotion — the events that occur in an environment are what give meaning to physiological changes felt
Autonomic Nervous System
involuntary subdivision of peripheral nervous system
PNS
rest and digest
SNS
fight or flight
Hypothalamus
small structure, located below thalamus, regulates the ANS. controls the endocrine system and regulates release of hormones
Thalamus
primary relay station for almost all sensory input in the brain, then directs to amygdala -> cerebral cortex
Hippocampus
transfers short-term memories to long-term memory storage
Amygdala
almond-shaped bilateral structure responsible for assessing events and forming emotional memories
Kluver-Bucy Syndrome
arises from bilateral destruction of both amygdalae, resulting in a flat affect, compulsion to put things into one’s mouth (hyperorality), hypersexuality, and behavioral disinhibition
Acute Stressor
short-term and discrete, with an end and a beginning (e.g., a final worth 50% of your grade)
Ambient Stressors
global challenges that affect individuals on a subconscious level, such as pollution, crime, city noise (they’re non-urgent, negative, and chronic)
Fight-or-flight
divert energy to vital organs for escaping, increases HR, respirations, and peripheral vasoconstriction to increase oxygen and blood supply and to expel CO2, endocrine system releases catecholamines like epinephrine and norepinephrine
Tend-or-befriend Response
behavioral response to stress characterized by seeking social support and caring for offspring, oxytocin is released, estrogen enhances the effects of oxytocin
General Adaptation Syndrome
Hans Selye’s stress model (3 stages): 1. alarm phase, 2. resistance phase, 3. exhaustion phase
Hypothalamic-Pituitary-Adrenal Axis (HPA Axis)
controls the stress response and mediates the general adaptation syndrome—circulatory system of hormonal controls between the hypothalamus, pituitary glands, and adrenal glands
Corticotropin-releasing hormone (CRH)
acts on anterior pituitary gland and stimulates the release of adrenocorticotropic hormone (ACTH)
Adrenocorticotropic Hormone (ACTH)
acts on adrenal cortex to release glucocorticoid hormones (cortisol) into the bloodstream, initiating a negative feedback loop going back to the hypothalamus and anterior pituitary to suppress CRH and ACTH release
Cortisol
stress hormone, suppresses immune response and breaks down glycogen into glucose for energy
Anhedonia
loss of interest in activities that are normally considered enjoyable