Liquor represents cerebrospinal fluid which constantly moves on brain ventricles, a subarachnoid space back and a brain, likvoroprovodyashchy ways.

The main function of liquor consists in protection back and a brain from mechanical damages, control of a water and electrolytic homeostasis and constant intracranial pressure. Also cerebrospinal fluid provides exchange and trophic processes between a brain and blood. Fluctuations of liquor influences a vegetative nervous system. Cerebrospinal fluid is important for normalization of osmotic pressure of a brain, to ensure functioning of neurons back and a brain, participates in formation of a blood-brain barrier, regulates the movement of blood in TsNS vessels. Besides, ways on which liquor flows and directly he are called brain "sewerage".

Liquor in brain ventricles, by secretion is formed by ferruterous cells. Other mechanism of secretion of cerebrospinal fluid it is possible to call transuding of plasma through an ependyma of ventricles and a wall of blood vessels.

Pressure of cerebrospinal fluid depends on in what situation there is a person: in a prone position it makes 200-250 units, sitting – 300-400. Liquor of the healthy person is colourless, contains a few ions of chlorine – about 120 mmol/l, crude protein – about 0,3 g/l and glucose – 2,8 – 4 mmol/l.

For the analysis of cerebrospinal fluid liquor gathers by means of a lumbar puncture. It represents a prick in lumbar area, is frequent under local anesthesia with novocaine use. The patient is in a sitting position or lying, having as much as possible bent a back outside. Usually for the analysis about 120 ml of cerebrospinal fluid undertake. Such analysis is carried out at suspicion on neuroinfection, at some types of anesthesia, for cerebral decompression at normotensive hydrocephaly of benign intracranial hypertensia.

At serious craniocereberal injuries the liquor effluence through a nose, ears is possible. It demonstrates serious damages of likvorny ways. In this case urgent hospitalization as such injury can end with a lethal outcome is necessary for the person.

Section: L