Limbic System Flashcards
What is the primary output of limbic system
hypothalamus
What types of innervation does the limbic system ahve
monoaminergic and cholinergic
Is the hypothalamus fully functional at birth
yes
What parts of the limbic system does dopamine have a diffuse effect on
nucleus accumbens
medial prefrontal cortex
septal nuclei
striatum
What has sexual dimorphism
hypothalamus
What are functions of the hypothalamus
emotiona lresponses
reproductive drive
endocrine
autonomic function
What type of internal information does the hypothalamus get
autonomic and hormonal
External information is not integrated into emotions unless it is processed by what
limbic system
What is responsible for raw and reflexive emotionality of internal needs (pleasure, rage, aversion)
hypothalamus
what assigns emotional significance to what is experienced
higher limbic structures
Where is the amygdala located
temporal lobe
what are the 3 major groups of nuclei found in the amygdala
basal-lateral
central
medial
what is the largerst group of nuclei found in the amygdala
basal-lateral
Why is the basal-lateral enlarged
it has to accommodate info flow from sensory cortex
amygdalectomy results in what
flat affect, loss of fear, diminished responsiveness to stimuli
what mediates facial expression perception
amygdala
instructured fear
instead of receiing an unpleasant stimulus, person is told that they are going to experience something unpleaant
observational fear learning
watching someone else experience the fear conditioning
what helps you regulate the expression of fear response and how much fear you will respond with
medial prefrontal cortex
what gives you contextual information about your fear
hippocampus
Function of mirror neurons
understanding emotion in others
what is the reinforcement limbic loop
nucleus accumbens -> ventral globus pallidus -> thalamus
what is the nucleus accumbens a part of
ventral striatum
what does the ventral tegmental area provide
dopamine
how does cocaine addiction work
cocaine binds to dopamine transporter, blocks it causing a increase in baseline conc of dopamine acting on nucleus accumbus. loss of dopamine’s ability to represent natural reward
how does addiction affect other systems
dampens cortical influence to reward system and increases limbic contribution
what is the limbic loop
ventral stratum - pallidus - thalamus - cortex
