Winquist R J, Bevan J A
Science. 1980 Feb 29;207(4434):1001-2. doi: 10.1126/science.7352293.
Intrinsic myogenic tone in the buccal segment of the rabbit facial vein is exquisitely sensitive to small changes in temperature in the range 33 degrees to 44 degrees C. This particular venous segment also exhibits a preponderance of beta-adrenergic receptors and receives a dense, medial sympathetic innervation. This area of the vein is proposed to act as a temperature-sensitive sphincter that distributes cooled nasal venous blood between superficial and deep venous drainage systems in the head and neck. Deviation of cool blood to deeper venous sinuses has been shown to be an important thermoregulatory mechanism.
兔面静脉颊段的内在肌源性张力对33摄氏度至44摄氏度范围内的微小温度变化极为敏感。这一特定静脉段还表现出大量的β-肾上腺素能受体，并接受密集的内侧交感神经支配。该静脉区域被认为起到一个温度敏感括约肌的作用，在头颈部的浅静脉和深静脉引流系统之间分配冷却的鼻静脉血。已证明将冷血偏向更深的静脉窦是一种重要的体温调节机制。
