Two recent reports, described such effect on avian and mammalian neuromuscular preparations: in the avian chick biventer cervicis preparation, the methanolic extract of R.
schneideri poison also caused facilitation of twitch tension followed by neuromuscular blockade in chick biventer cervicis avian preparation.
In a preliminary study, Ig fraction separated by dialysis, when incubated with the biventer cervicis nerve-muscle preparation [26] increased the magnitude of twitch responses of fast muscle fibers to electrical stimulation, as well as the response of slow muscle fibers to exogenous acetylcholine (Figure 4).