CAS BI 106 Lecture Notes - Lecture 10: Dural Venous Sinuses, Dura Mater, Arachnoid Mater
Document Summary
Dural venous sinsues: partitions of the dura form the dural venous sinuses, all blood leaving the brain goes here, then to decending veins, superior saggital sinus, straight sinus, transverse sinus. Headaches: no pain receptors in brain, dura is sensitive, pulling on scalpt or change in pressure in blood sinuses causes pain, caffeint is effective as component of headache medicine; constricts blood vessels, relieving pressure. Meninges: all 3 meninges cover the brain and the spinal cord. Lateral ventricles are connected to the third ventricle by the interventricular foramen: third ventricle is connected to the fourth ventricle by the cerebral aqueduct, fourth ventricle between pons and cerebellum, empties into central canal of spinal cord. Brain parts: 4 regions, cerebellum, responsible for proprioception where your body is in space, fine motor skills (fine tune movements initiated by the cerebrum, two regions: gray cortex, internal white matter (arbor vitae, alcohol: Loss of proprioception (fingers to nose: walki(cid:374)g (cid:862)fu(cid:374)(cid:374)y(cid:863, diencephalon.
