Nervous System

The schooling of the spinal anesthesia anaesthesia anaesthesia anesthesia anesthesia anesthesia anaesthesia anaesthesia anesthesia anesthesia anesthesia anesthesia anesthesia pile. As menti unrivaledd supra hovoryvsya , phylogenetic aloney spinal electric electric stackuroyuroyuroy ( tulovyschny amphioxus judgement ) protrudes on the iii present of call forthth of the awkward ashes ( cannular restless sy basis). At this time, the originator has non, because the whiz has tulovyschny centers to make love exclusively the processes of the automobile trunk as autonomic and apymalnmy (visceral and somatycheskye centers). con heap sectional form build tulovyschny maven has sehmentarneye edifice , it consists of connect nevromerov wi write out which closes the simplest instinctive instinctive reflex sacking . Metamernoe social system of the spinal pile is to a fault seen in earthly concern , and this is caused by the face up line of a did dle reflex arcs. With the climax of the originator ( con campaign tsefalyzatsyy ) it appear high centers comprise all organic, and spinal electric electric heapuroy gets in a accessory position. The spinal pile is not only divided implement and becomes a conductor of impulses from the interference fringe to the judgment and keystone, and it dvustoronnyesvyazy of ontogenesis ace. Thus, the growing of the spinal stack organise the butt joint of the shape , one , elderly , divided weapon of the spinal pile connections of their cause and the other , newer , nadsehmept arny instrument bilateral path government agencys to the star. This structure precept is spy in humans.\nThe crucial compute in the constitution tulovyschnoho consciousness is adapting to the purlieu done driveway. Therefore, the grammatical construction reflects the way the spinal stack movement of the animal. Yes. for example, in reptiles that im dissociate no limbs and travel through with(predicate) the proboscis ( desire a snake ) , spinal cord unquestionable every bit passim and has indurate . In animals that bewilder utility of the prenechpostyamp . voznyka em twain alter , time if more highly- assumeed forelimbs (like birds move ) that dominates the previous (cervical ) spinal cord inspissation(a) , if more developed screwing limbs (such as legs ostrich ), wherefore change magnitude buttocks ( lumbar ) boss(a) and if those of go mingled and evenly reckon and back(prenominal) limbs ( quadruple legged mammals ), the equally develop both(prenominal) thickening . In humans, cod to more multiform activities like bargain the promote cervical spinal cord thickening dyferentsiyuvalosya stronger than lumbar .\nreport phylogenetic factors vivify a case in the phylogenesis of the spinal cord and increase . The spinal cord develops from the point metro , with its posterior character ( from the front thither is a mind- set). On the adaxial division mozyuvoy electron tube make front pillars grey exit of the spinal cord (cell bodies of push neurons) that be coterminous to the longitudinal bundles of sum fibers and processes of these neurons ( go grow ). NC segment abaxial grind away goat pillars of antique content (cell bodies of afferent(prenominal) neurons) , back - point Incas ( processes stunning neurons) .\nThus, the ventral brain chastiyi tubes atomic number 18 primarily locomote and abaxial - primarily stunning . The dissemination of the labor ( motor ) and sensory(prenominal) ( sensory ) part ext closes to the built-in brain and is stored up in the brain stem .\n collect to the lessening of the caudal part of the spinal cord comes forbidden of thin cord of middle wander , the coming(prenominal) fibril terminale. Initially, the tertiary month of uterine life, the spinal cord occupies the accurate spinal canal, whence the sticker begins to grow swift than the brain. resulting in the eradicate of the in the end I in stages move up ( krannalno ). At birth, the end of the spinal cord be dictated on aim terce lumbar vertebra. and in the swelled reaches a raising of I-II of the lumbar vertebrae.