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Articles by X.R. Wang
Total Records ( 2 ) for X.R. Wang
  X.R. Wang , Y. Liu , L.P. Zhang , X.J. Wang and J.P. Wu
  The epidural retia mirabile is an arterial network formed by many of anastomotic branches from adjacent arteries for supplying blood to the brain in artiodactyla and plays a vital role in regulating cerebral blood flow. The purpose of this work was to compare anatomical differences of the epidural retia mirabile between the yak and cattle and to analyse their blood supply characteristics and provide a morphological basis for further research on the plateau adaptability of the yak. The vascular casts of the epidural retia mirabile were yielded on head specimens of 12 yaks (obtained from Qinghai China) and 10 cattle (obtained in Gansu China) by the corrosion casting technique. Their morphological features and arterial diameters were compared and analyzed using the methods of comparative anatomy. The general arrangements of the epidural retia mirabile in the yak were similar to that seen in cattle and mainly composed of the anterior portion, posterior portion, basi-occipital arterial plexus and anterior V-shaped extension. Middle width of the anterior epidural retia mirabile was more extensive and the posterior joint section was more developed and there were more abundant anterior anastomotic branches and communicating rami in the epidural retia mirabile of the yak. Moreover, the distribution ratios of blood flow from the maxillary artery entering the anterior epidural retia mirabile were 33.12% and 30.42% in the yak and in cattle, respectively. Our results indicated that the yak has more developed epidural retia mirabile. Its anatomical peculiarity perhaps is an adaptive characteristic of supplying blood system to the brain and which would help to buffer and regulate cerebral blood flow better so as to meet the cerebral oxygen demand of the yak in plateau areas.
  X.R. Wang , Y. Liu , T.F. Guo and J.P. Wu
  Anatomic characteristics of the cardiovascular system can reflect different supplying blood ability to tissues and organs. The Cerebral Arterial System mainly contributes to supplying blood to the brain tissue. In present study, researchers examined the morphological features and internal diameters of arteries and analyzed supplying blood ability of the Cerebral Arterial System of the yak and Chinese cattle with the Corrosion Casting technique and the methods of comparative anatomy. Results showed that general arrangements and calibers of most arteries of the Cerebral Arterial System between two species were similar but the anterior-posterior diameter of the cerebral arterial circle was shorter and interval distance of the cerebral carotid artery was closer in the yak. The yak has more developed internal arterial vessels and epidural retia mirabile and the blood volume of the Cerebral Arterial System in the yak showed anatomical superiority. Researchers deduced that the anatomic peculiarities of the cerebral arterial circle and relatively developed internal arterial vessels in the yak were beneficial to supplying more blood to the brain. The yak’s developed epidural retia mirabile was advantageous of the blood preservation, exchange and complement and it might play a vital role in buffering and regulating cerebral blood flow so as to meet demand of the yak’s brain for blood supply in the plateau areas.
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