SPINAL MECHANISM OF THE ABDOMINAL AND ERECTOR SPINAE SKIN REFLEXES
SPINAL MECHANISM OF THE ABDOMINAL AND ERECTOR SPINAE SKIN REFLEXES
复制标题
DOI：
10.1093/brain/81.3.290
复制
发表时间：
1958-01-01
期刊：
影响因子：
14.5
通讯作者：
HAGBARTH, KE
中科院分区：
文献类型：
--
作者：
KUGELBERG, E;HAGBARTH, KE
应用肌电技术对35例受试者的腹部和竖脊皮肤反射进行了研究。反射是通过机械刺激皮肤，或通过重复的电击刺激皮肤或肋间神经引起的。传入电弧处的传导速度高达40 Mpps。前提是反射阈值较低。腹部皮肤反射是一种脊髓多突触反射，具有最小的中枢延迟(3.55-5.4毫秒)。锥体病变中反射的丧失不是由于假想的大脑弧线中断，而是由于脊髓反射中心的兴奋性降低。5例临床上无腹部皮肤反射的播散性硬化症患者，电击肋间神经仍可引起类似腹部皮肤反射的反射反应。电击刺激后的躯干皮肤反射可能以每秒20次的频率出现一系列有节奏的爆发，而在两次放电之间运动神经元完全安静。腹部皮肤反射显示几乎没有任何节段性边界的证据，并照射在同侧的几个节段。躯干的皮肤反射形成了一种复杂的防御机制，根据受刺激的皮肤区域，具有特定的收缩和相互抑制的模式。无论在躯干的哪个点施加刺激，它都会导致反射模式，这种反射模式往往会导致远离刺激的运动，以及相邻肌肉的收缩，以保护下面的组织。躯干皮肤反射通常是由肌肉的弱或中等强度的收缩促进的，而肌肉的收缩被其拮抗剂的收缩激活和抑制。体位性和自主性收缩可能会深刻改变反射模式，并可能导致反转。
The abdominal and erector spinae skin reflexes were investigated in 35 subjects with electromyographical technique. Reflexes were elicited by mechanical stimulation of the skin, or by repetitive electrical shock stimulation of the skin, or an intercostal nerve. The conduction velocity in the afferent arc was high as 40 m.p.s. provided the reflex threshold was low. The abdominal skin reflex is a spinal polysynaptic reflex with a minimal central delay (3.55-5.4 msec). The loss of the reflex in pyramidal lesions is not due to an interruption of a hypothetical cerebral arc but to a diminished excitability of the spinal reflex center. In 5 patients with disseminated sclerosis and clinically abolished abdominal skin reflexes shock stimulation of an intercostal nerve still evoked a reflex response similar to the abdominal skin reflex. The trunk skin reflexes following shock stimulation may show a series of rhythmic bursts at a frequency of 20 per sec pften with complete silence of the motor neurons between the discharges. The abdominal skin reflexes show little evidence of any segmental boundaries and irradiate over several segments ipsilaterally. The skin reflexes of the trunk form an elaborate defence mechanism with a specific pattern of contractions and reciprocal inhibitions according to the skin area stimulated. At whichever point on the trunk the stimulus is applied it results in a reflex pattern which tends to induce movement away from the stimulus as well as a contraction of adjacent muscles for protection of underlying tissues. The trunk skin reflexes are generally facilitated by a weak or moderately strong contraction of the muscle activated and inhibited by the contraction of its antagonist. Postural and voluntary contractions may profoundly alter the reflex pattern and may cause a reversal.