Spontaneous activity in the isolated nerves of pulmonate molluscs

摘要: Abstract 1. Spontaneous activity in isolated pieces of the pallial nerves a variety pulmonates is described and it suggested that originated from ganglion cells along their length. 2. The active units show little response to changes concentration or osmotic pressure bathing fluid. 3. Cation imbalance solution produced marked frequency activity, monovalent divalent cations having opposite effects. Thus, potassium ions are excitatory excess, while absence reduces rate firing. 4. action pharmacological agents suggests many elements cholinergic, being stimulated by acetylcholine, anticholinesterases inhibit activity. Curare, however, was without demonstrable effect at relatively high concentrations.