BIOL 221L Lecture Notes - Lecture 3: Epidural Space, Autonomic Nervous System, Crista Galli
27 Jan 2017
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Document Summary
Bordering the central sulcus are the precentral gyrus and the postcentral gyrus. Parieto-occipital sulcus separates parietal lobes from occipital lobe lateral sulcus separates temporal from parietal and frontal lobes transverse fissure separates cerebral cortex and cerebellum. Meninges of the brain cover the outside of the brain and in between regions to provide protection and support: dura mater. Endosteal layer fused to skull, no epidural space. Subdural space (not present in healthy people: arachnoid mater. Arachnoid villus - bulb-like protrusions that transfer csf back into the blood stream: pia mater, extensions of meninges: Dural folds stabilize and support (like seatbelts) Falx cerebri separates cerebral hemispheres; located in longitudinal fissure; attaches to the crista galli. Tentorium cerebelli separates cerebral hemispheres from the cerebellum. Functional areas of the cerebral cortex: gray matter; no myelinated fibers; billions of neurons, regions. Premotor cortex frontal lobes; plan behavior (ex. brain determines the degree and sequence of muscle contraction to perform an action)
