1 This drug may have the effect of speeding up your heart rate. 2  I worry about the effect that violent movies may have on children. 3  Certain chemicals have been banned because of their damaging effect on the environment.  It's important to protect your skin from the harmful effects of the sun.
The CSF from all theses sources , as well as any formed in the central canal of the spinal cord, escapes from the fourth ventricle into the subarachnoid space through the median aperture (of Magendie) and lateral aperture (of Luschka).
Drainage can occur by gravity flow laterally in the direction of decreasing head (downhill hydraulic gradient) toward, say, a river, ditch, or lake; downward leakage to â¦ lower aquifer layers if heads in those layers are lower than the water table; induced lateral or vertical drainage by lowered heads due to ground-water pumping (actually a special case of the first condition); by direct evaporation from relatively shallow water tables and evaporation from the capillary zone that occurs in ...