Limbic System Flashcards

1
Q

HOME

A

homeostasis
olfaction
memory
emotion

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2
Q

limbic lobe

A

cingulate gyrus

parahippocampal gyrus

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3
Q

limbic system

A

anatomical substrate for drive-related and emotional behavior

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4
Q

neocortex

A

consciousness, perception

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5
Q

hypothalamus

A

autonomics

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6
Q

reciprocal input

A

with limbic system

-to neocortex and hypothalamus

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7
Q

components of limbic system

A
cingulate gyrus and cingulum
parahipocampal gyrus - uncus
hippocampus
amygdala - deep to uncus
septal region
hypothalamus
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8
Q

septal region

A

basal forebrain

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9
Q

papez circuit

A

cingulate gyrus
hippocampus
hypothalamus

neocortex / limbic system / hypothalamus

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10
Q

papez circuitry

A

hippocampus to mamilary body
-mammilothalamic tract

mammilary body to anterior thalamic nucleus

anterior thalamic nucleus to cingulate cortex

cingulate cortex to entorhinal cortex

entorhinal cortex back to hippocampus

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11
Q

olfactory input to limbic system

A

hippocampus and amygdala

-small in humans

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12
Q

neocortical input to limbic system

A

temporal association cx
-hippocampus and amygdala

frontal association cx
and parieto-occipital cx
-cingulate gyrus

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13
Q

ouput of limbic system

A

from hippocampus and amygadala

  • to hypothalamus
  • then to basal forebrain
  • then to prefrontal cortex
  • conscious thoughts

also hypothalamus to autonomics and physiologic response

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14
Q

basal forebrain

A

gateway for limbic system flow to cortex

-lesion - very little limbic system to cortex

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15
Q

frontal lobotomy

A

instrument through orbit
-lesion basal forebrain

cuts off limbic sytem connection to cortex

no emotion to cortex

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16
Q

emotion

A

mental state with measureable physiologic parameters and observable behavior

17
Q

feeling

A

subjective assessment of emotion

patient assessment

18
Q

affect

A

conscious appreciation of emotion and outward expression

19
Q

mood

A

sustained emotional state

-greater than weeks

20
Q

basic emotions

A
fear
anger
happiness
grief
disgust
21
Q

2 components of emotion

A

conscious feeling
-cortical

physiological change
-ANS, hypothalamus

22
Q

emotion connections?

A

between neocortex, limbic system, hypothalamus

driven by sensory input**

23
Q

somatic marker hypothesis

A

emotion starts with limbic systems response to INPUT

cortex creates cognitive responses

24
Q

central role of amygdala

A

fear and anger

strong emotion - improved memory

ability to recognize emotions

25
primary input to amygdala
basolateral nucleus
26
primary output to amygdala
central nucleus
27
emotional memory
in amygdala beta-adrenergic receptors
28
beta-blockers
to decreased PTSD
29
basal forebrain
decision making in regard to social behavior
30
loss of respect for social conventions
loss emotional knowledge lesion of basal forebrain
31
prioritizing behavior in social context
basal forebrain
32
phineas gage
hit with railroad spike -lost basal forebrain
33
modulatory systems
serotonin NE dopamine ACh