Lab 2 Flashcards
What is the thalamus, and where is its location in the brain?
It’s responsible for relaying sensory and motor information to the primary cortices.
It’s shaped like a dumbell, with a lobe on either side of the third ventricle, connected by a thin ‘bar’
What is the function of the mamillary body?
smell
What produces CSF?
Chorioid plexuses
Where does the third ventricle extend relative to the thalamus?
Anterior and posterior to it.
Where is peripheral vs. central vision in the primary visual cortex?
Peripheral is more anterior, central is peripheral (thus it’s more easily damaged by a knock)
Where does the midbrain begin and end?
Upper boundary: Runs from the occular motor nerve to the top of the superior colliculus
Lower boundary: From top of pons to bottom of inferior colliculus
What is the cerebral aqueduct?
Transports CSF from third to fourth ventricle
What are the cerebral peduncles?
Located above the pons in the midbrain, responsible for refining movement
What are the colliculi?
Superior colliculus: Reflexes to sight
Inferior colliculus: Reflexes to sound
What structure contains both white and gray matter?
Pons
What does the 4th ventral look like in cross section?
A little triangle
What is interesting about the cerebellum?
It doesn’t decussate (ipsilateral). Ie. the right cerebellum controls the right side of the body.
What are the features of the brain in lateral view which can help us identify the lobes?
The central sulcus
The lateral fissure
The parieto-occipital sulcus runs from the notch at the superior surface of the brain, which runs down to the pre-occipital notch (where the angle of the brain’s base changes).
By extending the central sulcus to meet the lateral fissure, and the lateral fissure to meet the parieto-occipital sulcus, the lobes of the brain can be identified.
What is interesting about where primary vs secondary association areas are located in the brain?
Primary areas are located in both hemispheres, whereas secondary areas are only located in the dominant hemisphere
Where is the striatum relative to the thalamus?
Lateral and anterior to the thalamus