When you plug your device into a charging socket or wall charger, the USB controller in your device talks to the USB controller attached to the socket/wall charger â or, if no controller is available, the device reads the voltage flowing across the four USB pins.
The volume of the ventricles is about 25 ml. CSF is produced at a rate of 0.2 - 0.7 ml per minute or 600-700 ml per day. The circulation of CSF is aided by the pulsations of the choroid plexus and by the motion of the cilia of ependymal cells.
As a space-occupying lesion or any of these volumes are. increased beyond capacity, ICP will rise (3). In the average adult, the brain volume is 1400 ml, the blood volume is 150 ml, and the CSF volume is 150 ml. CSF is produced by the choroid. plexus at a rate of approximately 20 ml/hr.