Arterial barostasis along the mouse tail between different steady-state flows.
From its etymology, "barostasis" would denote homeostasis with respect to pressure in relation to the blood vascular system. Arterial pressure and flow were measured along the proximal half of the tail of the unanesthetized, intact mouse with a pneumatic cuff and just distally with a pneumatic plethysmograph at room temperatures near 20 and 25 degrees C. The pressure fell measurably from proximally to distally at both temperatures. From 20 to 25 degrees C barostasis was evident in that the local pressure changed relatively little proportionately in comparison with a considerable proportional increase in flow. As in other studies the occlusion of the circulation for some seconds was followed by a momentary increase in flow lasting less than a minute.