Exam #3: Lab V Flashcards
What artery supplies the lateral surface of the cortex?
MCA
What is the function of the association tracts?
Sending information from one part of the hemisphere to another part of the IPSILATERAL hemisphere
List the three association tracts.
1) Superior longitudinal fasiculus
2) Uncinate fasciculus
3) Occipitofrontal fasciculus
What structure lies deep to the association tracts?
Internal capsule
What direction are the fibers of the internal capsule directed?
Vertically
What is the corona radiata?
Extension of the internal capsule that spreads toward the cortex
What are the optic radiations?
Tracts that carry information from the thalamus to the visual cortex
What two basal nuclei is the anterior limb of the internal capsule associated with?
1) Caudate (Head of the Caudate)
2) Putamen
What nuclear group sits lateral to the third ventricle?
Thalamus
What is the wall between the lateral ventricles?
Septum pellucidum
What are commisural tracts?
White matter tracts that carry information from hemisphere to CONTRALATERAL hemisptere
What does the anterior white commissure connect?
Frontal and temporal lobes
Where is the external capsule?
OUTSIDE of the basal nuclei (vs. the internal capsule that is inside the basal nuclei)
What is the fornix?
Tract that runs from the mammillary bodies to the limbic lobe
Where can you find the column of the fornix?
Inferior to the septum pellucidum
What is the region of the cortex that surround the corpus callosum?
Cingulate gyrus
When the cingulate gyrus narrow anteriorly, what is this structure called?
Isthmus of the cingulate gyurs
What does the isthmus of the cingulate gyrus connect to?
Parahippocampal gyrus
What is the most medial aspect of the parahippocampal gyrus called?
Uncus
What structure is deep to the uncus?
Amygdala
What structure are the mammillary bodies part of?
Hypothalamus
What white matter attaches the hypothalamus to the limbic system?
Fornix
In an anterior coronal section, what basal nuclei will border the lateral ventricle?
Caudate (Head of the Caudate)
How does the anterior limb of the internal capsule appear on coronal section?
“Striated”
*Bordered by the Head of the Caudate & the Putamen
What is the nucleus accumbens?
Fusion of the head of the caudate with the putamen
*Important to motivation and reward (addiction)
What white matter tract is lateral to the thalamus?
Posterior limb of the Internal Capsule
What are disorders of the amygdala association with?
- Olfactory & gustatory hallucinations
- De ja vu
What structure is posterior to the amygdala?
Hippocampus
What is the hallmark of the midbrain?
Red Nucleus
What structure sits superior and lateral to the Substantia Nigra?
Subthalamic Nuclei
What structure sits between the superior colliculi?
Epithalamus
What part of the corpus callosum is anterior? What part of the corpus callosum is posterior?
Anterior= genu Posterior= splenium
What is the extreme capsule?
White matter association tract that is lateral to the claustrum
What is the claustrum?
Grey matter strip lateral to the external capusle
Where is the tail of the caudate?
Posterior aspect of the lateral ventricle
What structure sits posterior to the optic chiasm?
Stalk of the pituitary/ infundibulum
What is the difference between a T1 & T2 weighted image on MRI?
T1= enhances fluid
What space does CSF flow through in the brain and spinal cord?
Subarachnoid space
What makes up the basis pontis?
Transverse white matter fibers
What artery sits in the midline of the pons?
Basilar artery
What is the hallmark for the dentate nucleus on cross-section?
It looks like a row of teeth
What fissure separates the cerebellum from the occipital lobe?
Transverse fissure
**Tentori cerebellum is located here
What does the primary fissure separate?
Anterior lobe & posterior lobe of the cerebellum
What does the posterolateral fissure separate?
Posterior lobe from the nodulus
What are the grooves in the cerebellum on mid-sagittal section called?
“Folia” b/c they look like leaves
What is the medulla of the cerebellum?
White matter of the cerebellum
What is the flocculus inferior and lateral to?
MCP
What is the flocculus connected to?
Nodulus (which is more midline)
What is the flocularnodular lobe responsible for functionally?
Balance & posture
What cranial nerve is associated with the flocularnodular lobe?
CN VIII
