HTHSCI 1H06 Lecture Notes - Lecture 27: Arachnoid Granulation, Diencephalon, Subarachnoid Space
29 Apr 2016
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Document Summary
Peripheral nervous system (pns) consists of: mixed spinal nerves carrying sensory information from body to cns (afferents, mixed spinal nerves carrying motor information from cns to body (efferents) Cns and pns are made up of 2 major cell types: Neurons are post-mitotic; glia inhibit axon growth. Meninges: the three membranes that line the skull and vertebral canal and enclose the brain and spinal cord. Inward extensions of dura divide the cranium into compartments. Falx cerebri (left and right cerebral hemispheres) Extreme movements of the cns may be restricted by the dural extensions, resulting in damage to the brain or nerves. Ne, delicate membrane in between dura and pia. Subarachnoid space contains cerebral spinal fluid (cpf) Covers surface of brain and cerebral vessels. Hematoma: a solid swelling of clotted blood within the tissues. The brain is formed as a tube during development. Csf drains from the subarachnoid space into the super sagittal sinus (venous blood)
