Kawasaki F, Kita H
Department of Physiology, Kawasaki Medical School, Okayama, Japan.
Neuroreport. 1993 Mar;4(3):251-4. doi: 10.1097/00001756-199303000-00006.
Cricket (Gryllus bimaculatus) abdominal muscle 202 produced both small and large excitatory junctional potentials (EJPs) depending on the intensity of the stimulation to the nerve. Abdominal muscle 203 generated only small EJPs. The large EJPs, the threshold of which was always slightly higher than the small EJPs, were more sensitive to the Ca2+ concentration at which they were evoked and to concentration changes. There were no marked differences between the two muscles regarding the electrical properties of the muscle fibre membrane and the quantal size of the transmitter. The causes of the differences between the two types of EJPs in these muscles are discussed.
蟋蟀（双斑蟋）的腹部肌肉202根据对神经刺激的强度产生大小不同的兴奋性接头电位（EJP）。腹部肌肉203仅产生小的EJP。大的EJP，其阈值总是略高于小的EJP，对诱发它们的Ca2+浓度以及浓度变化更敏感。在肌肉纤维膜的电特性和递质的量子大小方面，这两块肌肉之间没有明显差异。本文讨论了这些肌肉中两种类型EJP差异的原因。
