reticular formation of the brain stem reticular formation is, a set of neural structures, located in the central parts (thalami, midbrain and medulla).Neurons that constitute it, differ in size, the length of axons structure.There they densely intertwined.
functions of the reticular formation
formation associated with the cerebellum, spinal cord, cortex in the cerebral hemispheres, the limbic (providing the most important reactions in the body) system.In the reticular formation interact ascending (afferent) and descending (efferent) impulses.The pulses can circulate and closed neural circuits.In such a case, provided constant stimulation of neurons in the reticular formation on some level.The result is a specific commitment to the activities of various departments of the central nervous system.Adjust the degree of excitation of the mesh formation is carried bark cortex.
reticular formation includes areas with the potential to facilitate or inhibitory effects on spinal motor reactions.
the first time the relationship between the spinal reflexes and stimulation of different parts of the reticular formation was detected Sechenov.Subsequently, the American neurophysiologist Megounom with the assistance of staff was clearly illustrated by the observation of Sechenov.
Thus, when electrical stimulation of the medial area in anesthetized monkeys and cats there is a complete cessation of movement, as a reflex, and causes stimulation of the motor areas of the cerebral cortex.Thus all brake phenomenon that provokes the reticular formation, has undergone irritation, are bilateral in nature.
When exposed to lateral reticular formation zone on the periphery, has an inhibiting effect of the area revealed facilitating effect on spinal motor activity.
reticular formation is able to work on different spinal education.
should be noted that the area of the mesh formation, possessing facilitating effect on motor activity extends anteriorly.Thus, it covers not only the region of the medulla oblongata, and midbrain and pons.Net
education can have an effect on muscle tone.This provision opened R. granite.Swedish neuropsychologist showed that the reticular formation affects the activity of the gamma motor neurons.Their axons are on the so-called "intrafuzarnym" muscle fibers and exercise an important role in the regulation phase movements and postures of the body.
Different area of the reticular formation are able to exert influence exciting generalized on the cerebral cortex, thus involving all of its area.
maintain active reticular formation and sensitivity to various chemical elements circulating in the blood is carried out by humoral factors (carbon dioxide, catecholamines, etc..).This, in turn, promotes the inclusion of the reticular formation in the individual regulation of autonomic functions.
It should be noted that the study of the relationship of the mesh formation with other subcortical structures, it helped to clarify the properties of neurophysiological mechanisms of the nature of individual states (pain, waking, sleeping, vigilance, emotional and motivational states and others).Using studies of drugs reveals the treatment of certain pathologies of the central nervous system, define a new approach to certain medical problems.
