VIII- Emotion Flashcards
parts of emotion
physiologic state + cognitive sensation (feelings)
-feeling conscious awareness by cortex
-physiologic state = skeletal muscular activity + visceral (autonomic + endocrine)
how hypothalamus mediates emotion
raw/reflexive emotion expression thru ANS for internal needs
-symps and parasymps
-pleasure, rage, aversion
how amygdala processes emotions
external reality/experiences NOT just internal needs
understanding emotion in others
mirror neurons!! @ premotor cortex
via activating our own neural representation of observed actions/emotion
-mirror neurons > insula > limbic system
reward system in brain
nucleus accumbens (reward center) signaled by dopamine for positive feedback in limbic loop of thalamus
-dopamine from ventral tegmental area
addiction
disrupt frontal cortical behavioral control mechanisms + inc limbic negative affect/craving/anxiety
-hypofrontality
functions of limbic system
- emotional/affective responses
- critical for certain learning/memory
- homeostasis
so if dysfunctional get psych disorders and dementia
components of limbic system
- limbic cortex (insula, anterior cingulate cortex, medial prefrontal cortex)
- hippocampus
- amygdala
- nucleus accumbens
- hypothalamus
primary output of limbic system
hypothalamus!!!
where amygdala located
anterior medial portion of temporal lobe
-multiple subunits with different inputs
functions of amygdala
- fear response/conditioning
- facial expression perception
- homeostasis
- sensory perception
- motivation
fear conditioning process
aversive unconditioned stimulus paired to neutral conditioned stim to evoke fear response
-amygdala activated by auditory thalamus/ cortex + somatosensory thalamus/cortex
types of fear
- conditioned- conditioned + undconditioned
- instructed - unconditioned threat verbalized
- observational - someone else going thru fear conditioning
brain centers in fear response
- hippocampus adds contextual regulation to amygdala
- medial prefrontal cortex regs degree that amygdala expresses fear response
autism hypothesis
dysfunctional mirror neurons/mirroring deficits
-bc social, affective form of imitation and missing emotional connections,
