Anatomy of the Limbic System

Question 1

1. name & id cortical components of limbic system?

Answer 1

cingulate gyrus, medal orbito-frontal gyri, straight gyrus, entorhinal cortex, perirhinal cortex, parahippocampal cortex, hippocampal cortex

Question 2

1a. what cortical gyrus is adjacent to the corpus callosum?

Answer 2

cingulate gyrus

Question 3

2. name & ID major limbic structures supplied by anterior cerebral artery?

Answer 3

primary motor cortex, anterior cingulate cortex, medial orbitofrontal cortex, gyrus recti

Question 4

2a. what symptoms characterize abulia?

Answer 4

1. reduced spontaneous movement, though & speech
2. passivity & lack of interest in social interaction
3. increased response time to queries & prolonged speech latency

Question 5

3. name & id limbic structures supplied by posterior supplied by posterior cerebral artery

Answer 5

medial temporal lobes

alex said: medial orbitofrontal cortex, anterior cingulate cortex, primary motor cortex, primary sensory cortex

Question 6

3a. in what subarachnoid cistern could an arterial infarct occur that compromised both the R & L posteiror cerebral arteries simultaneously but not other midbrain or cerebella arteries?

Answer 6

interpeduncular cistern

Question 7

4. name & ID parts of frontal cortex that provide ethical & motivational context for emotional responses?

Answer 7

anteromedial parts: anterior cingulate gyrus, anterior prefrontal cortex, medial orbitofrontal cortex

Question 8

5. name amygdaloid nuclei that receive input from thalamus, anterior cingulate cortex, & olfactory bulbs, respectively

Answer 8

basolateral nucleus
lateral nucleus
central nucleus

Question 9

5a. what nucleus coordinates amygdaloid output to brainstem?

Answer 9

central nucleus

Question 10

6. name & id 3 main amygdaloid efferent fiber tracts

Answer 10

anterior commissure, ventral amygdalofungal pathway, stria terminalis

Question 11

6a. what amygdaloid efferent tract conveys fibers triggering consciosu perceptions of emotional responses?

Answer 11

ventral amygdalofungal tract