Urology Clinic. GW Medical Faculty Associates. The George Washington University. 2150 Pennsylvania Avenue, NW. Washington, DC 20037. PURPOSE. Laparoscopic Simple Nephrectomy is a minimally invasive technique to remove the. entire that is usually used as a treatment for poorly functioning kidneys.
White matter is a vast, intertwining system of neural connections that join all four lobes of the brain (frontal, temporal, parietal, and occipital), and the brainâs emotion center in the limbic system, into the complex brain maps being worked out by neuroscientists.
The brain of humans consists of gray matter and white matter. The gray matter contains the nerve cells. The white matter of the brain is composed of nerve fibers and myelin. The nerve fibers form the connections between the nerve cells. Myelin is a fatty sheath wrapped around nerve fibers. The myelin sheath has two functions: insulation and acceleration of impulse conduction.