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.
What Is a CSF Analysis? Cerebrospinal fluid (CSF) analysis is a way of looking for conditions that affect your brain and spine. Itâs a series of laboratory tests performed on a sample of CSF. CSF is the clear fluid that cushions and delivers nutrients to your central nervous system (CNS). The CNS consists of the brain and spinal cord. CSF is produced by the choroid plexus in the brain and then reabsorbed into your bloodstream.