...Joachim Schmidt; Claudia Mangold; Joachim W. Deitmer ABSTRACT Using single-electrode current-clamp and two-electrode voltage-clamp, different identified neurones of the leech ( Hirudo medicinalis L.) were shown to hyperpolarize, or to exhibit outward currents (usually >2 nA), during bath...

... heartbeat interneurons acetylcholine bicuculline methiodide Hirudo medicinalis . In the circulatory system of the leech, blood is moved by rhythmic constrictions of two lateral muscular vessels, the ‘heart tubes’. The heart tubes are innervated by bilateral pairs of motor neurons, the HE cells...