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Afferent systems. Anatomical and functional features. Lesion Syndromes at Different Levels

The importance of afferent systems is evidenced by the anatomical features of the nervous system. So, in the posterior (afferent, sensitive) roots of the spinal cord there are up to 1 million fibers (in each), and in the anterior (efferent, motor) - only 200 thousand fibers. Afferent systems located in the lateral and posterior columns of the spinal cord occupy the boulevard territory than the descending efferent pathways. The body can respond to any pain irritation with an instant reflex reaction, which is realized at the level of the spinal cord. However a sensation of pain

its analysis, emotional coloring, and the construction of a behavioral strategy are associated with cerebral systems of the brain stem, thalamus, limbic-reticular complex, and cerebral cortex. Acute pain is most often in a certain way topically determined and based on the local pathological process. The nature, nature of the pathological process, the degree of involvement of pain receptors determine the intensity and characteristics of pain.



Strilo Pallidum (afferent systems)

The strio-pallidar system has numerous connections:

• paths connecting the formations of the strio-pallidar system;

• pathways connecting the strio-pallidar system with the final motor path and muscle; mutual relations with various departments of the extrapyramidal system and the cerebral cortex;

• ways of afferentation.

There are several ways to deliver the pulses of the stri-pallidar system to the segmental motor apparatus:

• Monaco rubro-spinal path from red nuclei;

• the vestibulo-spinal path from the vestibular nucleus;

• reticulo-spinal paths from the reticular formation;

• tecto-spinal paths from the quadruple;

• pathways to the motor nuclei of the cranial nerves.

Providing automated execution of motor acts, the strio-pallidar system should receive comprehensive information about the state of muscles, joints, tendons, body position in space, etc.
e. Afferent systems serving the stripo-pallidum (information impulses from the “sensitivity collector” - the thalamus, from the cerebellum, reticular formation, corrective signals from the cortex, etc.) create, together with efferent pathways, feedback rings with a continuous flow of informing and correcting ones, ordering signals. Pulse circulation does not stop, uniting all motor and afferent systems into a single whole. With damage to the nuclei of the extrapyramidal system and their connections, various symptoms occur. The main ones are hypotonic-hyperkinetic and akinetic-rigid syndromes. Violations of the extrapyramidal system are manifested in the form of changes in motor function, muscle tone, autonomic functions, and the emotional sphere.

The importance of afferent systems is evidenced by the anatomical features of the nervous system. So, in the posterior (afferent, sensitive) roots of the spinal cord there are up to 1 million fibers (in each), and in the anterior (efferent, motor) - only 200 thousand fibers. Afferent systems located in the lateral and posterior columns of the spinal cord occupy the boulevard territory than the descending efferent pathways. The body can respond to any pain irritation with an instant reflex reaction, which is realized at the level of the spinal cord. However a sensation of pain

its analysis, emotional coloring, and the construction of a behavioral strategy are associated with cerebral systems of the brain stem, thalamus, limbic-reticular complex, and cerebral cortex. Acute pain is most often in a certain way topically determined and based on the local pathological process. The nature, nature of the pathological process, the degree of involvement of pain receptors determine the intensity and characteristics of pain.
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Afferent systems. Anatomical and functional features. Lesion Syndromes at Different Levels

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