What is the central nervous system
central nervous system (CNS) is located in the skull and spinal column.This part of the nervous system handles the pulses which are received from the sensor "sensor", called receptors.Target CNS - to regulate processes occurring every second in the body.In fact, this part of the nervous system directs behavior and organize it in a special way in time and space.
CNS has a rather complex anatomical structure.It includes the brain and spinal cord, which are located in a viscous medium within the skull and vertebral column.All parts of the central nervous system is protected from possible damage liquor - cerebrospinal fluid.Included in the system are threefold fabric shell.
basis of the structure and ac
tivity of the central nervous system - nervous tissue, consisting of a set of neurons.Nerve cells have an elongated shape.Size neuronal axon given length ranging from several microns to several tens of centimeters.Nerve cells have high conductivity and good sensitivity.Such properties allow these specialized elements of the central nervous system to effectively conduct electrical impulses.
in the central nervous system, there are several billion neurons.Bound in a network, they unite together all the systems of the body and work very smoothly performing monitoring and control functions.The neurons, called receptors, are close to large branches and trunks to form nerves.Effectors, in turn, emerge from the central nervous system;Their task - to supervise and guide the work of the muscles.
central nervous system has a strict hierarchy of the structure, where there is the subordination of lower levels higher.The main centers occupy a leading position in the CNS.Their work is based on the principle of spatial symmetry: all structures of the central nervous system have an average line and consists of two identical halves.
most difficult part of the central nervous system - the brain.To describe in detail the features of its equipment and the full range of functions carried out by the brain, it will take more than a thick volume.Not all of the properties of the brain and CNS today generally studied thoroughly.There are plenty of "white spots" and puzzles over which puzzled scientists.
specialists today have at their disposal a detailed "map" of conducting neural circuits built using methods of physiology.But even such a detailed scheme has not yet answer the question of what is the true nature of mental activity of living organisms.