The principle of subordination

The principle of subordination , or subordination, also belongs to the category of the most important principles of the organization of the brain. According to this principle, the activity of the underlying brain regions is controlled and controlled by the overlying departments of the central nervous system. For example, in the motor systems of the brain and the autonomic nervous system contains neural about unity (nerve centers), located in the spinal cord or in the brain stem, which are subject to the activity of neural associations (ner in GOVERNMENTAL centers) located in the hypothalamus, thalamus, cerebellum, Basal deformed nuclei and cerebral cortex.

The principle of feedback (feedback afferentation) and copies Effer n Tatsiy . According to this principle, in order to precisely coordinate the activities of various neural associations (nerve centers, reflex arcs), information on the results of an action that is optimal in volume is necessary. It enters the brain through sensory channels. The absence of such inform a tion results in the disintegration of the brain. Especially graphic role in implementing reverse afferentation motor activity – violation proprioceptive sensitivity, are generally inhibited at an execution of precise movements and also gives the possibility of forms and tion and maintaining adequate for this motion poses.

The principle of reciprocity (conjugation) of excitation and inhibition at the level of the spinal cord is realized with the participation of reciprocal inhibition, due to which unconditional motor reciprocal reflexes arise. Reciprocal inhibition is performed by the mechanism of pos t synaptic inhibition that occurs with special gusset inhibitory neurons.

Principles of coding information in the nervous system . In general, all the information or a substantial part of it transmitted to the central nervous system from one department to the other, lies in the spatial and temporal switchgear e lenii pulse flows, while using different neural codes. There are three main groups of codes. Non-pulse signals , which are characterized by intra-and extracellular factors. K factors include intracellular receptor and amplitude characteristics sinapt and potentials are, amplitude and spatial characteristics of synaptic conductivity changes, the spatial and temporal distribution of the membrane potential characteristics and n graduality of axons in axon terminals. Extracellular factors – vysvobo Well denie neurotransmitters and potassium ions, neurosecretion, electrotonic mutually and -interaction. Pulse signals in single neurons. For impulse codes, the main candidates are spatial codes (“tagged lines”, t.   e.   information representation by channel number) and temporal – various types of frequency or interval codes (weighted average frequency, instantaneous frequency, discharge frequency, interval histogram form, and   t.   d.). Isolated as microstructural to about dirovanie (temporary pattern pulse), latent code (moment of appearance or the phase of the discharge), the numerical code (number of pulses per packet), the code length of the packet (length of impulses), the presence of separated s momentum of or lack thereof) change the speed of propagation of excitation in the axon and the spatial sequence of phenomena in the axon. Ensemble activity (coding by ensemble). In a large district of cases the CNS using space-time encoding are a state where a signal is transmitted to the channel attributes information and to clarify I etsya various modifications timecode.

local_offerevent_note May 19, 2019

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