Lecture 3 ANS Flashcards
resistance and resistors
not linearly related to n resistors
conductance and resistors
linearly related to n resistors
resistors
here: sweat glands
thermoregulation in the brain
hypothalamus
grip in the brain
motor nuclei
sweat glands on palms and feet
more than anywhere else
probably evolutionary for climbing trees
emotions coordinate system
valence & arousal
alternative system emotions
bifurcating lines with appetitive and defensive motivation
IAPS
international affective pictures set
created by people’s ratings
skin conductance and stimuli
there is always some reaction
Iowa Gambling Task
cards with different potential gain and loss
best strategy are lower valued cards
pre hunch period Iowa Gambling Task
controls draw more bad high valued cards
hunch phase Iowa Gambling Task
controls start to learn
and show different SCR
ventromedial patients don’t learn
don’t change SCR
SCR
skin conductance response
non specific skin conduction responses
not tied to any stimulus
environmental stimuli that are not controlled
or internal processes, thoughts
SNS PNS link
not, as previously thought, reciprocal
probably independent
different mixes can lead to the same outcome
plotting autonomic space
x and y are PNS and SNS
third dimension are functional states = combined activity
autonomic space order
sleep drowsy relaxed alert fight or flight
orienting response
mice
moderately loud simulus
heart rate goes down -> PNS
then goes up -> SNS
loud stimulus rats
no orienting response
only SNS
defense cascade
prepares organisms for fight or flight behavior
distal
predator imminence
higher level brain structures
proximal
predator imminence
lower structures take over
most common stress paradigm humans
public speaking
measure of SNS
PEP
measure of PNS
heart rate variability
= RSA
reactivity definition
can vary
e. g. baseline vs trial
or doing task vs doing nothing
