NS 23 - emotion and motivation

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(Neuroscience ) JC3 Fichas sobre NS 23 - emotion and motivation, creado por Erica Lai el 30/11/2018.
Erica Lai
Fichas por Erica Lai, actualizado hace más de 1 año
Erica Lai
Creado por Erica Lai hace alrededor de 6 años
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sensory inputs that can trigger emotion go to ... thalamus and then to 2 pathways: fast - directly to the amygdala - this pathway elicits autonomic arousal and hormonal responses that are part of the physiological components of emotion slow - allows cortex time to think about the situation
brain parts principally involved in emotional responses first sensory info goes to the thalamus and hypothalamus - thalamus decides if it is emotional relevant or not if it is it is sent to the cortex and limbic system for processing - how relevant it is, etc. then the hypothalamus is stimulated to produce a response
hypothalamus modulates the activity of 3 things and in doing so controls homeostasis and emotional behaviour - what are the 3 things autonomic nervous system endocrine system limbic system
where is the hunger centre and satiety centre in the hypothalamus? lateral region = hunger centre ventromedial region = satiety centre
what 3 things make up the limbic system? cingulate gyrus hippocampal formation amygdalae
amygdala is connected to which 2 structures and what does it do in those areas? visual cortex and hippocampus it modulates their functions and facilitates perceptual and memory functions in those areas
which areas (3) regulate emotion dysregulation of these leads to amygdala prefrontal cortex anterior cingulate cortex failures of emotion regulation, increased impulsivity, aggression, and violence
Kluver-Bucy Syndrome bilateral destruction of anterior temporal lobes and amygdala resulted in the triad of docility: the absence of fear response hyperorality hypersexuality
amygdala damage decrease conditioned fear response decrease ability to recognise the meaningfulness of facial and vocal expressions of anger in others
hippocampal damage inability to convert recent memories --> LTM
what is motivation? state of being that produces a tendency toward some kind of action
outline Maslow's hierarchy of needs first level = basic needs like food and water second level = safety needs (security and protection) third level = pursue of closeness and affiliation with others fourth level = self-esteem needs and esteem of others fifth level = self-actualisation needs (not everyone reaches this level)
mesolimbic-dopamine system a reinforcement pathway linked to reward from drugs dopamine might be the cause of intense craving associated with withdrawal
operant conditioning learning through consequences
classical conditioning learning through association
which type of conditioning is implicated when someone gets addicted to drugs? classical - associate 'high' (reward) with taking drugs
dysfunctional circuits in mental illness: anxiety increase amygdala activation in response to seeing angry/fearful faces amygdala activity is directly proportional to anxiety severity decrease ventrolater prefrontal cortex activation - prefrontal cortex does not reduce amygdala activation in those with anxiety
dysfunctional circuits in mental illness: depression smaller amygdalae increased amygdala activation in response to fearful/sad faces -this hyperactivation is normalised with anti-depressants
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