Lab 1: Brain Organization Meninges/ Ventricles Flashcards
what are Gyrus?
they are the ridges of the brain, they contain cell bodies of the neurons, dendrites, and synapses
What is the Sulcus?
the grooves of the brain. The deeps the grooves the more cortical brain depth
what is the sensory cortex responsible for?
receiving and processing sensory information from across the body such as touch, temperature, and pain
what is the parietal lobe vital for?
sensory perception and integration including taste, hearing, sight, touch and smell
what do the ventricles house?
the cerebral spinal fluid
what connects the 3rd and the 4th venticle?
the cerebral aqueduct
what produces CSF
the choroid plexus
where is CSF reabsorbed
through the arachnoid granulations into the superior sagittal sinus at the top of the falx cerebri
CSF circulation
-produced int he choroid plexus
-Lateral ventricles
-Foramen of Munroe
-the 3rd ventricle
-cerebral aqueduct
- 4th ventricle
-foramen of luscjke and magendie
-subarachnoid space
-arachnoid granulations to the dural venous sinus
what are the layers of the meninges
1) dura matter
2) arachnoid matter
3) pia matter
purpose of the meninges
- protect the brain and spinal cord
-support for important veins, arteries, and sinuses
-enclose the fluid filled cavity Subarachnoid Space containing the CSF
Parts of the Dura matter
- Falx cerebri
-Tentorium Cerebelli
what does the falx cerebri separate?
the two cerebral hemispheres
what does the Tentorium cerebelli encase?
the cerebellum
what is the supplementral motor area function
planning of movement, planning of sequences of movement, the coordination of the two sides of the body
where does decussation occur in the lateral corticospinal tract?
the cervicomedullary junction (pyramids of the medulla)
what percent of the anterior corticospinal tract stays unilaterally and where does that intervation end?
10% and ends at the mid thoracic area
what is the brain blood barrier (BBB)
semi-permeable and allows for some materials to cross but prevents others from crossing
what are tight junctions purpose
protect the brain from “foreign substances” in the blood that may injure the brain
what do tight junctions within the choroid epithelim prevent
the passage of cells (virus, bacteria, and fungus) to prevent infections
what types of molecules are able to penetrate into the brain from the BBB
lipid soluble molecules
