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.
Cerebrospinal Fluid Production. CSF is produced in the chambers of the brain called ventricles. The two highest ventricles in the brain are the lateral ventricles. The third ventricle lies below them and the fourth ventricle lies below the third.A dense plexus of blood vessels, called the telea choroidea, lies close to the ventricles.SF flows out of the ventricles of the brain where it is produced and into the subarachnoid space of the brain and cord. Some CSF also flows down through a channel in the center of the cord called the central canal. The central canal, however, appears to close with age.