Cerebrum Flashcards
Describe the content of the anterior commissure of the brain.
White matter tract connecting both temporal lobes of the cerebral cortex across the midline
How can we identify the anterior commissure?
It is placed in front of the COLUMNS of the fornix
Describe the content of the posterior commissure of the brain.
White matter tract connecting temporal lobes
How can we identify the posterior commissure?
Located just dorsally to the cerebral aqueduct
The fornix is an important part of what specific system?
The limbic system
What are the 4 components of the fornix (rostral to caudal)?
- Anterior columns
- Body
- Crus/posterior column
- Fimbria
The ________ __________ is a white matter structure composed of bundles of myelinated fibers that course past the basal ganglia.
Internal capsule
List the components of the internal capsule (IC).
- Anterior limb
- Genu
- Posterior limb
How can we identify the anterior limb of the IC?
It lies between the head of the CAUDATE NUCLEUS and the LENTIFORM NUCLEUS
How can we identify the posterior limb of the IC?
It lies between the thalamus and lentiform nucleus
What do we find in the cingulum and where do we find it?
white matter; it is located beneath the cingulate gyrus
It connects cingulate gyrus and parahippocampal gryus
List the true lobes of the cerebrum.
- Frontal
- Temporal
- Parietal
- Occipital
- Insula
What gyri do we find in the LIMBIC lobe?
- Cingulate gyrus
- Parahippocampal gyrus
**Stars anteriorly as cingulate gyrus, then continues into medial temporal region as parahippocampal gyrus, ending in a hook shaped fold called the uncus.
What is the limbic system involved in?
Behavioral and emotional responses
Inferior frontal gyrus consists of what 3 regions?
- Pars orbitalis
- Pars triangularis
- Par opercularis
Inferior lobule of parietal lobe consists of what 2 gyri?
- Supramarginal gyrus
2. Angular gyrus
What fissure separates precunes and cuneus gyri?
Parieto-occipital fissure
What fissure separates cuneus gyrus from lingual gyrus?
Calcarine fissure
What Broadman’s area is associated with the superior transverse temporal gyrus?
Primary auditory center (Area 41 and 42)
What is included in the basal ganglia striatum?
Caudate nucleus (head, body, tail) Nucleus accumbens
What is included in the basal ganglia lentiform nucleus?
Putamen
Globus pallidus externus
Globus pallidus internus
What region of the brain is the integrative center for emotions, emotional behavior, and motivation?
Amygdala
What region of the brain relays information about recollective memory through the fornix to the mammillary bodies?
Hippocampus
