Limbic system Flashcards
what does the limbic system do
acts as interface between internal and external environment
what are the 2 main functions of the limbic system
learning and regulation/ translation of emotional state into appropriate behaviour
how does the limbic system operate
influences endocrine system and ANS
what does the nucleus accumbens do
pleasure centre
how are components of the limbic system linked
via Papez circuit
what are the components of the limbic system (7)
cingulate gyrus hippocampus Parahippocampal gyrus anterior perforated substance septal nuclei uncus amygdala
what is the role of the hypothalamus
coordinates drive related behaviour
homeostasis
what is the endocrine function of the hypothalamus
oxytocin and ADH produced here
what would damage to the hypothalamus result in
disrupts homeostasis and drive-related behaviours
what would a lesion of the anterior hypothalamus result in
inability to dissipate heat
what would a lesion of the posterior hypothalamus result in
inability to retain heat
what would a lesion of the lateral puberal nucleus of the hypothalamus result in
loss of hunger
what would a lesion of the ventromedial nucleus of the hypothalamus result in
loss of satiety
where are working memories stored
prefrontal cortex
what is involved in the formation of new memories
mammillary bodies
what is explicit memory
conscious memory
what are the divisions of explicit memory
episodic (autobiographical) and semantic (knowledge about stuff)
what areas are involved in episodic memory
hippocampus and midbrain
what areas are involved in semantic memory
frontal temporal lobe
what is implicit memory
unconscious memory e.g. sensory motor skills, driving
what are the components of implicit memory (3 things)
skills/ habits
conditioned reflexes
emotional
what areas are responsible for skill/ habit implicit memory
cerebellum and basal ganglia
what areas are responsible for conditioned reflexes of implicit memory
cerebellum (and others)
what areas are responsible for emotional implicit memory
amygdala
what sort of matter is the amygdala
grey
what is the role of the amygdala - general and specific
fear centre
- receives highly processed information
- produces instinctive emotional output
- responsible for emotional memory and fear
what is the role of the hippocampus
episodic memory
construction of mental images and short term memory
spatial memory and navigation
what are the 2 types of tract tracing
anterograde and retrograde
what is anterograde tract tracing
transports from neuronal cell bodies to axon terminals
what is retrograde tract tracing
transports from axonal terminals to neuronal cell bodies
