Lab 11 - Limbic system Flashcards
Rearrange the following structures in superior > inferior order.
Corpus callosum, Callosal sulcus, Cingulate gyrus, Cingulate sulcus.
What arteries are found in those two sulci?
Cingulate sulcus is superior to the cingulate gyrus, which is superior to the callosal sulcus, which is superior to the corpus callosum.
The cingulate sulcus contains the callosomarginal artery. The callosal sulcus contains the pericallosal artery.
What is the function of the corpus callosum?
It is a relay between the two cerebral hemispheres (but, doesn’t connect the two temporal lobes).
The uncus is a part of what gyrus?
What gyrus is this one continuous with posteriorly?
What lies deep to the uncus? (inferior view)
Parahippocampal.
Continuous with lingual gyrus posteriorly.
The amygdala is deep (and lateral) to the uncus.
In what lobe can the hippocampus be found?
Describe its physical relationship to the amygdala.
Temporal lobe.
It is continuous with the amygdala (posterior to it).
Decribe the path taken by the fornix.
As it descends, it passes in between two structures. What are they?
The fornix stretches from the hippocampal fimbriae, arches over the thalamus, then terminates in the mammillary bodies.
The columns of the fornix insert posterior to the anterior commissure, but anterior to the interventricular foramen of Monro.
What are just anterior and posterior to the mammillary bodies?
Where is the infundibulum located? What surrounds it?
The mammillary bodies are posterior to the infundibulum, and anterior to the midbrain (cerebral peduncles).
The infundibulum is within the interpeduncular fossa. Anteriorly we find the optic chiasm, and posteriorly we find the mammillary bodies (still in the fossa).
What can be found in the septum pellucidum?
The body of the fornix.
