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To the top cervical segments approach back sshshalnye the arteries arising from pozvonochnyh of arteries after they get through a firm cerebral cover (see with. 67), and also back koreshkovo-spinal arteries and among them that which accompanies 2nd cervical sensitive root. 2. Blood supply of average cervical segments according to 4th, 5th, 6th and 7th is provided with 2-3 forward koreshkovo-spinal arteries departing from a site pozvonochnoj of an artery, located in the channel of cross-section processes; these arteries often go, alternating that on the right, at the left. Three-four back koreshkovo-spinal arteries otho djat from pozvonochnoj arteries also join back spinal arteries. 3. The bottom cervical and top thoracal segments are supplied with an almost constantly forward koreshkovo-spinal artery which departs from the right or left shejno-intercostal trunk, it accompanies the buddy ki With?, Sz or DI and often represents the basic source of blood supply of a cervical thickening.
This occurrence is usually refers as ways to last longer. When this artery is especially developed, quantity pe rednih koreshkovo-spinal arteries - branches pozvonochnoj arteries, decreases.
54 Whether are pozvonochnye and shejno-intercostal arteries unique sources of blood supply of a spinal cord? Whether take in its part other arteries the necks departing from a subclavial and external carotid, whether the blood overflow can be carried out on them? Let's remind that anatomists indirectly already considered this question. G. Paturet (1964) specified that among muscular branches pozvonochnoj at-lanto-epistrofejnaja the branch anastomoses arteries with a deep cervical artery, and the back cervical branch (or suboktsipitalnaja artery Salmon), most appreciable of muscular branches, anastomoses with occipital and deep cervical arteries. Moreover, the ascending cervical artery anastomoses with branches pozvonochnoj arteries. However this anatomic data does not give us data on how these arteries can participate in spinal cord blood supply. M.A.Vo-sniak (1964) and W. S. Fields and co-workers. (1965), and then R. Labau-ge and co-workers. (1969) the first have shown value muscular kol - Fig. 30. Roentgenography after fruit liqueur of arteries colloid barium through shejno-mezhre-bernyj a trunk on a corpse.
1 - a forward spinal artery; 2 - � the koreshkovo-spinal artery going from shejno-interribs th of a trunk; 3 - the koreshkovo-spinal artery departing from a deep cervical artery; 4 - a deep cervical artery. lateralnoj networks of occipital area in blood flow restoration at an occlusion pozvonochnyh arteries. For careful studying of participation of these arteries in blood supply of a spinal cord we on corpses entered colloid barium in pozvonochnye arteries and into each of its collaterals with external somnolent and subclavial arteries (G. Lazorthes, A. Gouaze, 1966-1968).
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In pictures it was possible to track a contrast agent way. On the basis of the received data we have come to a following conclusion. The pozvonochnaja artery immediately anastomoses: - At level of the bottom third with arteries of a humeral plexus and scalene muscles; - At level of the two bottom thirds with the located steps collaterals of ascending and deep cervical arteries; - at level of the top third in the field of a back arch of an atlas with an occipital artery. Collaterals of deep and ascending cervical arteries which depart from subclavial (fig. Hers nephew has some information about ways to last longer. 30 and 31), and collaterals of the occipital artery which is a branch of an external carotid, participate together with pozvonochnoj and shejno-intercostal arteries in blood supply ����55 Fig. 31. Overflow ways at an occlusion pozvonochnoj arteries. Anastomoses with a deep cervical artery (1), with ascending cervical (2) and occipital (3) form sub-oktsipitalnyj arterial anastomoti-chesky knot. nogo a brain.