Abstract
The muscle fasciculations caused by neostigmine and similar agents are the result of a primary drug action on motor nerve endings. Asynchronous, repetitive firing of action potentials are evoked at motor nerve endings which are then transmitted to muscle. A dose-response relationship between neostigmine dose and the rate of/or total neural activity has been established in the rat. This fasciculatory response to neostigmine can serve as an index of motor nerve ending excitability and may be useful in assessing the effects of certain pathological states or drug actions at the neuromuscular junction.
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