Cerebrum Flashcards
A large fiber tract connecting the right and left cerebrum
corpus callosum
What is the purpose of the corpus callosum?
To allow neurons on one side of the brain to connect with their homologous counterparts
What layer is the granule layer? From where does it receive input?
This is the second layer and receives INPUT from the cortex; it has stellate cells
What layer is the external pyramidal layer?
The third layer; sends OUTPUT to the cortex; it’s axons can project to the surface of the cortex
Name the forth layer; what input does it receive?
internal granule; receives thalamic input
What is the internal pyramidal layer?
the fifth layer that sends info to the brain stem and the spinal cord
What is the deepest layer?
the multiform layer which sends info back to the thalamus
What do the laminae thickness have to do with regional function?
is it thought that differences in the cortex between regions has to do with the different levels of thickness of the laminae
Where is the white matter located in regards to the cortex?
deep to the cerebral cortex
What is in the white matter?
cortical axons that are leaving the cerebrum, going to the thalamus, or axons going from one area of the cortex to another
What is contained in the internal capsule?
a curtain of descending fibers from the pre-central gyrus
Between the putamen and the thalamus is the posterior or anterior limb of the internal capsule?
posterior
Between the putamen and the caudate nuceli is the anterior or posterior limb of the internal capsule?
anterior
Upper motor neurons controlling muscles of the torso and limbs is located in the anterior or posterior limb of the internal capsule?
posterior
Damage to the posterior limb of the internal capsule produces what signs?
contralateral spastic paresis
Why do we care about the input from the midbrain and hypothalamus?
many drugs are used to impact this cortical input
What nuclei uses serotonin?
Raphe nucleus (midbrain)
What drugs influence serotonin?
SSRI: heighten activity in the frontal lobe involved with mood
What lobe is Broca located in?
the frontal lobe
Damage to Broca’s produces what symptoms?
the inability to form language, either spoken or written. but this patient will be able to understand what is being said
What lobe is wenicke’s located in?
parietal
Damage to wenicke produces what symptoms ?
word salad; understanding language
This is responsible for attention
dorsal lateral
This kind of nuclei is connected to wide-spread regions of the cortex
non-specific nuclei
Connects Wernicke’s area to Broca’s
superior longitudinal fasiculus
