刺激频率对大鼠快肌骨骼肌血流的影响。
The effect of stimulation frequency on blood flow in rat fast skeletal muscles.
作者信息
Hawker M J, Egginton S
机构信息
Angiogenesis Research Group, Department of Physiology, University of Birmingham Medical School, Birmingham B15 2TT, UK.
出版信息
Exp Physiol. 1999 Sep;84(5):941-6.
The effect of stimulation frequency on intact muscle blood flow was measured by radiolabelled microsphere entrapment. Maximum flow occurred at 4 Hz in both extensor digitorum longus and tibialis anterior (156 +/- 13 and 205 +/- 24 ml min-1 (100 g)-1, respectively). Regional differences in fibre composition were reflected in the relative flow rates, with functional hyperaemia in the oxidative tibialis anterior core being twice that of the glycolytic cortex at 10 Hz. A consistent difference in flow between legs was noted that may originate from an unequal division of the common iliac artery in rats.
通过放射性标记微球捕获法测量刺激频率对完整肌肉血流的影响。在趾长伸肌和胫骨前肌中，最大血流均出现在4 Hz时（分别为156±13和205±24 ml·min⁻¹·(100 g)⁻¹）。纤维组成的区域差异反映在相对血流速率上，在10 Hz时，氧化型胫骨前肌核心的功能性充血是糖酵解型皮质的两倍。注意到两腿之间血流存在一致差异，这可能源于大鼠髂总动脉的不均等分支。
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