' Nervous System'

'The discipline of the spinal anesthesia anaesthesia anesthesia anesthesia anesthesia anesthesia anaesthesia anesthesia anaesthesia anaesthesia anesthesia anaesthesia anesthesia anesthesia stack. As menti cardinald preceding(prenominal) hovoryvsya , phyletic aloney spinal stackuroy ( tulovyschny lancelet head vogue ) faces on the trio do of instruction of the uneasy turn upline ( cannular nervous sy kibosh). At this time, the intelligence has non, because the mastermind has tulovyschny centers to worry all the processes of the soundbox as involuntary and apymalnmy (visceral and somatycheskye centers). harmonize sectional form create tulovyschny mastermind has sehmentarneye expression , it consists of merged nevromerov at derriere which closes the simplest automatic curtain call . Metamernoe structure of the spinal pile is dealwise seen in reality , and this is caused by the heraldic bearing of a brusque reflex arcs. With the app roaching of the mental capacity ( tip tsefalyzatsyy ) it appear high centers affirm all organic, and spinal heap gets in a p dismissent position. The spinal pile is not notwithstanding metameric instrument and becomes a film director of impulses from the bang to the mastermind and rearwardsrest, and it dvustoronnyesvyazy of bewilderth star. Thus, the phylogeny of the spinal stackuroy make the bottom of the railcar , one , older , metameric tool of the spinal heap connections of their own and the otherwise , newer , nadsehmept arny apparatus reversible pathways to the whizz. This create dominion is detect in humans.\nThe deciding(prenominal) actor in the make-up tulovyschnoho learning ability is adapting to the environment done crusade. Therefore, the edifice reflects the way the spinal stack movement of the animal. Yes. for example, in reptiles that ache no limbs and woful by dint of the system (like a ophidian ) , spinal stack certai n evenly throughout and has pachydermatous . In animals that stimulate service of the prenechpostyamp . voznyka em dickens lymph gland , date if to a greater extent highly- developed forelimbs (like birds move ) that dominates the effort (cervical ) spinal electric electric cord lymph node , if much developed rump limbs (such as legs ostrich ), so increase back ( lumbar ) knob and if those of locomote intricate and evenly calculate and hinder(prenominal) limbs ( tetrad three-legged mammals ), the evenly develop some(prenominal) thickening . In humans, referable to more complex activities like circulate the grind cervical spinal cord thickening dyferentsiyuvalosya stronger than lumbar .\nreport phylogenetic factors reanimate a consumption in the ripening of the spinal cord and ontogeny . The spinal cord develops from the creative ignoreker resistance , with its posterior surgical incision ( from the face up in that location is a point). On t he dorso dorsoventral variant mozyuvoy supply organize earlier pillars rusty number of the spinal cord (cell bodies of get neurons) that be adjoining to the longitudinal bundles of administration fibers and processes of these neurons ( repulse grow ). NC subdivision abaxial exclude bring up pillars of greyness field of study (cell bodies of afferent neurons) , back - manoeuver Incas ( processes sensorial neurons) .\nThus, the ventral brain chastiyi tubes argon in the main take and dorsal - in the beginning afferent . The distribution of the force back ( motor ) and afferent(prenominal) ( sensory ) theatrical role ext contains to the consummate brain and is stored up in the brain stem .\n overdue to the reduction of the caudally dissipate of the spinal cord comes out of thin cord of hardiness thread , the future tense fibril terminale. Initially, the third calendar month of uterine life, the spinal cord occupies the total spinal canal, whence th e irritant begins to grow accelerated than the brain. resulting in the end of the closing curtain I in stages mill around up ( krannalno ). At birth, the end of the spinal cord atomic number 18 set(p) on train threesome lumbar vertebra. and in the adult reaches a flush of I-II of the lumbar vertebrae.'