PSYC 3410 Chapter Notes - Chapter 10: Substantia Nigra, Brain Tumor, Temporal Lobe Epilepsy
16 Mar 2016
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Document Summary
A tumor or neoplasm is a mass of cells that grows independently of the rest of the body. Tumors that grow between the meninges, the three membranes that cover the central nervous system. 20% of tumors found in the human brain. As a result they are particularly easy to identify on a ct scan, they can influence the function of the brain only by the pressure they exert on surrounding tissue. They are almost always benign tumors: tumors that are surgically removable with little risk of further growth in the body. Encapsulation is the exception rather than the rule when it comes to brain tumors. Aside from meningioma"s, most brain tumors are infiltrating. As a result they are usually malignant tumors it is difficult to remove or destroy them completely and any cancerous tissue that remains after surgery continues to grow. Gliomas brain tumors that develop from glial cells, are infiltrating, rapidly growing, and unfortunately common.
