HLSC 1200U Chapter Notes - Chapter 14: Foramen Magnum, Nerve Root, Vestibulospinal Tract
16 Nov 2016
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2 protective covering: outer covering consists of bone (cranial bones encase the brain, vertebrae the spinal cord) and the inner covering consists of meninges. Dura mater: strong, fibrous tissue that serves as the outer layer of meninges and as rhe inner periosteum of the cranial bones. Falx cerebri: projects downward into the longitudinal fissure to form partition between cerebral hemispheres, curing sickle shape that extends from roof of cranial cavity. Falx cerebelli: sickle shaped extension tat seperates the two hemispheres of the cerebellum. Tentorium cerebelli: seperates the cerebellum from the cerebrum, forms a tentlike covering with the cerebellum. Whre the flax cerebri descends between the left and right cerebral hemispheres, the space is called the superior saggital sinus. Dural sinuses function as venomous resevoirs collecting blood from brain tissues from the return trip to the heart. Arachnoid mater: delicate, web like layer that lies in between the dura mater and pia mater.
