4-Limbic System

Question 1

limbic structures function

Answer 1

memory, defense, reproductin
-survival

Question 2

structures

Answer 2

1. cingulate gyrus
2. parahippocampal gyrus
3. subcallosal gyrus
4. hippocampus
5. amygdala
6. septal area
7. hypothalamus
8. uncus olfactory cortex

7 and 8

Question 3

olfactory pathway

Answer 3

1. bulb
2. tract
3. medial and lateral stria
4. medial > anterior commissure to share info with other hemisphere + septal area
5. lateral > amygdala, piriform lobe, uncus @ temporal lobe

Question 4

pathways into hippocampus

Answer 4

1. alvear path
2. perforant path

then thru dentate gyrus before hippocampus proper

receive input from entorhinal cortex

Question 5

CA1 region

Answer 5

of hippocampus
highly susceptible to hypoxia

Question 6

types of memory

Answer 6

1. working- cerebral cortex
2. short term- hippocampus
3. long term- cerebral association areas
4. semantic- words, geography, history, multiplication tables
5. episodic- personal unique events

Question 7

major input to amygdala

Answer 7

1. olfactory- emo signif to odors
2. sensory- 5 senses, monitor for threats
3. viscereal sensory- from hypothalamus
4. cingulate cortex- physical and emo comfort level

Question 8

major output amygdala

Answer 8

1. reciprocol connections with inputs
2. cingulate cortex connects to all cerebral lobes
3. ventral amygdalofugal pathway to basal ganglia/nucleus accumbens/ventral striatum

Question 9

septal area

Answer 9

perceptions of pleasure and well being
-inputs from hippocamp and amy complex via stria terminalis
-outputs back to hippo + hypothalamus via medial forebrain bundle + brainstem via medial forebrain

addiction pathway?