Triggering of lordosis reflex in female rats with somatosensory stimulation: quantitative determination of stimulus parameters.
Triggering of lordosis reflex in female rats with somatosensory stimulation: quantitative determination of stimulus parameters.
复制标题
体感刺激雌性大鼠脊柱前凸反射的触发：刺激参数的定量测定。
作者：
L. Kow;M. Montgomery;D. Pfaff
1.双侧接触胁腹后，对雌性大鼠尾根部和会阴部皮肤施加40--440毫巴的压力，足以引起脊柱前凸反射。单纯的头发偏转或有害刺激对于脊柱前凸行为的发生既不充分也不是必要的。 2. 对于给定的压力，增加刺激面积可以增加诱发脊柱前凸的效果；来自不同皮肤位置的机械感受器的输入可以被总结以触发行为反应。 3.在交配行为期间，雄性大鼠对雌性皮肤的压力增加（50--450毫巴）与脊柱前凸的可能性和强度增加相关。 4.增加雌激素的剂量会增加给定压力刺激下脊柱前凸的可能性。激素效应的特点是促进从尾基和会阴上的低阈值压力受体到运动神经元的吞吐量，以实现腰椎前凸背屈。
1. Pressure on the skin of the tail base and perineum of female rats in the range of 40--440 millibars, following bilateral contact with the flanks, was adequate to elicit the lordosis reflex. Hair deflection alone or noxious stimulation was neither sufficient nor necessary for lordosis behavior to occur. 2. For a given pressure, increasing the area of stimulation increased the effectiveness for evoking lordosis; inputs from mechanoreceptors at different skin locations can be summated to trigger the behavioral response. 3. During mating behavior, increased pressure from the male rat on the skin of the female, in the range of 50--450 millibars, was associated with increased probability and strength of lordosis. 4. Increasing the dose of estrogen increased the probability of lordosis to a given pressure stimulus. The hormone effect can be characterized as a facilitation of the throughput from low-threshold pressure receptors on tail base and perineum to motoneurons for the lumbar vertebral dorsiflexion of lordosis.