Cerebrospinal fluid function

There are many tissues in the human brain, and cerebrospinal fluid is part of the brain tissue. Cerebrospinal fluid is a transparent, colorless liquid that plays a very important role in the human brain. If there is a lack of cerebrospinal fluid in the brain, metabolites may not be cleared normally and accumulate in the brain, causing cerebral infarction. People who lack cerebrospinal fluid may also develop mental illnesses. What are the functions of cerebrospinal fluid?

Cerebrospinal fluid: Cerebrospinal fluid is a colorless, transparent liquid present in the ventricles and subarachnoid space. The specific gravity is 1.005 and the total amount is 130-150ml. The average daily production is 524ml. Cerebrospinal fluid surrounds and supports the entire brain and spinal cord, effectively reducing the weight of the brain to 1/6 and providing a certain degree of protection against external injuries. It plays the same role as lymph fluid in other parts of the body in clearing away metabolic products and inflammatory exudates.

Cerebrospinal fluid is produced in the choroid plexus of the lateral ventricles. Most of it is an ultrafiltrate of plasma, but it also contains components actively secreted by the choroid plexus. There are mechanical and permeability barriers between the blood and cerebrospinal fluid, and between the cerebrospinal fluid and the brain, which are called the blood-cerebrospinal fluid barrier and the cerebrospinal fluid-brain barrier, respectively.

Produced by special blood vessels inside the brain and reabsorbed by special venous branches. It provides shock absorption and support to the central nervous system. A normal adult has 130 ml of clear cerebrospinal fluid; cerebrospinal fluid is often taken for testing to diagnose diseases of the nervous system.

It is one of the inherent contents of the cranial cavity. It is mainly produced from the choroid plexus in the lateral ventricles, third ventricle and fourth ventricle. The secretory pressure of CSF depends mainly on the difference between mean arterial pressure and ICP. CSF is absorbed mainly through arachnoid granulations, and CSF enters the venous sinuses unidirectionally at a certain flow rate. The rate of absorption depends on the pressure difference between ICP and venous pressure. Secretion and absorption are in a state of relative balance, and it can be seen that ICP is the key to regulating the balance.