STUMP CURRENTS IN REGENERATING SALAMANDERS AND NEWTS
STUMP CURRENTS IN REGENERATING SALAMANDERS AND NEWTS
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DOI：
10.1002/jez.1402310209
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发表时间：
1984-01-01
影响因子：
--
通讯作者：
MILES, ES
中科院分区：
文献类型：
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作者：
BORGENS, RB;MCGINNIS, ME;MILES, ES
来自不同栖息地的各种蝾螈和蝾螈[Aneides lugubris， Batrachoseps attenuatus, Ensatina eschscholtzi xanthoptica, Taricha torosa, Pleurodeles waltlii， Ambystoma mexicanum和Necturus maculosus]在前肢截肢后，都能从前肢残端输出稳定的离子电流。断肢数小时后，残肢电流的密度约为。10 - 100 .mu。A/cm2，且随时间下降。在大多数情况下，残端电流的大小取决于外部介质（人工池塘水）中Na+的浓度，这表明在两栖动物（特别是青蛙）中描述的众所周知的Na+依赖经皮电压是该残端电流的EMF[电动势]。这些测量结果与先前报道的北美红斑蝾螈（Notophthalmus viridescens）的测量结果相吻合，表明截肢后的电变化在这一群体的成员中很普遍。
A variety of salamanders and newts [Aneides lugubris, Batrachoseps attenuatus, Ensatina eschscholtzi xanthoptica, Taricha torosa, Pleurodeles waltlii, Ambystoma mexicanum and Necturus maculosus] from differing habitats all drive a steady ionic electric current out of the forelimb stump tip after forelimb amputation. Several hours after amputation the density of this stump current ranges from .apprx. 10-100 .mu.A/cm2 in most species, and declines with time. In most cases, the magnitude of the stump current is dependent on the concentration of Na+ in the external medium (an artificial pondwater), suggesting that the well-known Na+-dependent transcutaneous voltage described in amphibia (particularly frogs) is the EMF [electromotive force] for this stump current. These measurements add to those previously reported for the North American red spooted newt (Notophthalmus viridescens) and suggest that electrical changes following amputation of urodele limbs are widespread among members of this group.