BIOL 2110K Lecture Notes - Lecture 15: White Matter, Ependyma, Heart Rate
Document Summary
Chapter 13 brain and spinal cord part 1. Gray matter made of neuron cell bodies, dendrites, and unmyelinated axons. Cerebral nuclei: regions of grey matter found deep in cerebrum. Enclose and protect blood vessels supplying the brain. Web of collagen, elastin fibers, filled w/ cerebral spinal fluid. Dense irregular connective tissue, meningeal and periosteal layers. Connected to each lateral ventricle by an interventricular foramen. Connected to 3 aqueduct; opens to subarachnoid space medially and laterally; narrows before merging w/ central canal of spinal cord ventricle by rd cerebral. After passing through apertures, it flows in subarachnoid space and down into central canal of spinal cord. Excess csf flows into arachnoid villi and drains into dural venous sinuses. Endothelial cells are connected by many tight junctions. Bbb reduced in certain locations for functional reasons. Hypothalamus and pineal gland need to secrete hormones. White matter tracts connect hemispheres at few locations. Regions of cerebrum may exhibit multiple functions, some not easily.
