limbic system Flashcards
limbis borders
diencephalon
cortical association areas
temporal parietal cingulate olfactory prefrontal
procedural/implicit memory
habits
skills
sensorimotor adaptations
emotional memory
conditioned preferences or aversions
memory modulation
declarative/explicit memory
episodic and semantic conscious recollections
flexible expression
positive primary reinforcers
light touch, food, smell, sex, unconditioned reinforcer
negative primary reinforcers
pain
hunger
amygdala and hippocampal formation gets inputs from
limbic association cortex
-temporal lobe, orbital gyri, cingulate gyrus
heteromodal cortex
-prefrontal association cortex, pareital temporal occipital cortex
hippocampus involved in
explicit memories
hippocampus works with
entorhinal cortex
-inflow to hippocampus
explicit memories is
conscious recollection of facts, spatial memory
memory consolidation
processes whereby initially labile memories become permanent
long term memory resides in
higher order association areas of cerebral cortex
long term memory processed by
hippocampal formation
korsakoff syndrome
destruction of mammilary bodies and medial thalamus
memory loss
septal nuclei regulates
motivated behavior
-reproduction and feeding
hippocampal formation during active behavioral states
pleasure is release of
dopamine in nucleus accumbens
reward system originates from
ventral tegmental area
reward system sends dopaminergic projections to the
nucleus accumbens
prefrontal cortex
dorsal striatum
nucleus accumbens receives excitatory inputs from
prefrontal cortex
hippocampus
thalamus
amygdala
ventral tegmental area sends dopamine projections to
nucleus accumbens
dopamine pathway functions
reward pleasure, euphoria motor function compulsion perserveration
serotonin pathway functions
mood
memory processing
sleep
cognition
inputs to amygdala arrive in
basolateral nuclei
what is central nucleus of amygdala
output nuclei sending projections out for emotional expression
2 ways sensory inputs arrive in amygdala
thalamus
sensory/association cortex
what kind of info come from thalamus to amygdala
less processed info, more primitive emotional responses such as startle and fear
what kind of info comes from sensory cortex to amygdala
info more cognitively processed, more subtle emotion like anxiety
emotional stimuli received by ___ and passed to ___
BLA
central nucleu
in prefrontal and cingulate cortex amg proves
basic emotional valence
decision making
in hypothalamus….
autonomic resp initiated and CRH released to initiate HPA response
in midbrain __ produces defensive behaviors and ____
PAG
hypoalgesia
damage to amygdala
inability to recognize facial expressions like fear
inability to recognize emotional content of speech
3 components of amygdala
central nucleus
cotrticomedial nucleus
basolateral nucleus
what does basolateral nucleus do
attaches emotional significance to stimuli
what does central nucleus do
mediates behavioral responses to emotional stimuli
what does cotricomedial nucleus do
olfactory perception-plays role in behaviors triggered by olfactory stimuli
dopamine in limbic system
synapse on areas involved in emotions, learning, memory
schizophrenia
serotonin
synapse on areas involved in mood
anxiety and OCD
noradrenergic neurons
depression
cholinergeric neurons
alzheimers begins with loss of cholinergic neurons in basal forebrain
