limbic system Flashcards
how does the limbic system operate
by influencing the endocrine system and the autonomic nervous system
what are limbic structures innterconnected by
fornix
mammillothalamictrcat
stria terminalis
cingulate
what is the limbic system responsible for
emotional life
- mood
- motivation
- pain and pleasure
what is the role of the cingulate gyrus
control of emotional and isceral responses, aggressive behaviour
describe the loop in the papez circuit generated by the cingulate bundle
- connecting the prefrontal projections of the cingulate gyrus to the hippocampus in the parahippocampal gyrus of the temporal lobe.
- The hippocampus then connects to the mammillary nuclei via the fornix (FX).
- The mammillary nuclei project to the ventral/anterior thalamus via the mammillothalamic tract (MTT).
- The ventral/anterior thalamus links back into the prefrontal cortex and anterior cingulate gyrus via the thalamo-cingulate projections (TC) to complete the Papez circuit
what is in the limbic system
cortical areas:
septal area
cingulate gyrus
parahippocampal gyrus
deeper structures:
hippocampus and fornix
amygdala
mammillary bodies
anterior nuclei of the thalamus
what is the function of the thalamus inthe limbic system
provides sensory information access to the limbic system
what is a clinical perspective related to the papez circuit
dementia
what is the septal area connected to
hypothalamus and hippocampus
what is a clinical perspective of the amygdala
kulver-bucy syndrome
what is the role of the amygdala
reproduction, fear and aggression and modulation of the autonomic and neuroendrocrine systems
what is the cingulate gyrus connected to
thalamus and hypothalamus
how does the cingulate gyrus communicate with the hypothalmus
by the mammillothalamic tract
what is the role of the septal area
relief of fear, docile behaviour and stress
what is the papez circuit
A series of connections between the principal structures of the limbic system
what occurs if hippocmapus is damaged
amnesia
how is the amygdala connected to the hypothalamus
stria terminalis
what connects the cingulate gyrus to the anterior nuclear group of the thalamus
the thalamic radiations
