Lab 2: Brain Flashcards
diencephalon
superior to the brain stem
consists of the thalamus, hypothalamus, epithalamus
and third ventricle
telencephalon
cerebrum and lateral ventricles
brain stem
medulla
oblongata, pons, and midbrain
what is the difference between cranial and spinal dura mater?
cranial dura mater has 2 layers, while spinal dura mater only has 1
how and where is CSF produced?
majority of CSF production is from choroid plexuses,
networks of blood capillaries in the walls of the ventricles.
Ependymal cells joined by tight junctions cover the capillaries of the choroid plexuses.
Selected substances (mostly water) from the blood plasma, which are filtered from the capillaries are secreted by the ependymal cells to produce CSF.
circulation of CSF
The CSF formed in the choroid plexuses of each lateral ventricle flows into the third ventricle through two narrow, oval openings, the interventricular foramina (singular is foramen). More CSF is added by the choroid plexus in the roof of the third ventricle. The fluid then flows through the aqueduct of the midbrain (cerebral aqueduct), which passes through the midbrain, into the fourth ventricle. The choroid plexus of the fourth ventricle contributes more fluid. CSF enters the subarachnoid space through three openings in the roof of the fourth ventricle: a single
median aperture and paired lateral apertures one on each side.
CSF then circulates in the central canal of
the spinal cord and in the subarachnoid space around the surface of the brain and spinal cord.
CSF is gradually reabsorbed into the blood through arachnoid villi, fingerlike extensions of the arachnoid mater that project into the dural venous sinuses, especially the superior sagittal sinus
what are the 3 extensions of the dura mater that separate parts of the brain?
falx cerebri ( separates the 2 hemispheres of the cerebrum)
falx cerebelli( separates the 2 hemispheres of the cerebellum)
tentorium cerebelli( separates the cerebrum from the cerebellum)
what is expected to be seen in the same coronal section through the middle of the brain?
where is the primary visual cortex located?
calcarine sulcus
what are the parts of the hindbrain?
Pons, cerebellum, medulla, fourth ventricle
parts of the midbrain
superior and inferior colliculi
cerebral aqueduct
cerebral peduncles
how are the 2 thalami connected?
intermediate mass
3rd ventricle location
between thalami
what part of the basal ganglia can be seen in a medial view of the brain
head of caudate nucleus
name the part of the brain
cingulate gyrus
name the part of the brain
mammillary body
