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.
CSF in the ventricles is different from CSF in the lumbar region. Protein levels in the ventricles are 66% lower (mean 15 mg/dL in ventricles versus 45 mg/dL in lumbar area) and glucose levels are 10% higher in ventricles. Clumps of choroidal cells are observed more commonly in VP fluid.otal CSF volume is 90-150 mL in adults and 10-60 ml in neonates. There is a constant turnover of about 14% of the volume per hour. About 300-500 mL of CSF are formed per 24 hours (0.35 mL per minute).