Experimental myotonia induced in denervated muscles by 2,4-D.
Rats were denervated in one hind limb and injected with 2,4-dichlorophenoxyacetic acid (2,4-D). Isotonic tetanic contractions of the muscles treated with 2,4-D after more than 10 days of denervation revealed prolonged relaxation times similar to those of the intact side and characteristic of clinical myotonia. No myotonic discharges were observed in the muscles denervated for more than 10 days and treated with 2,4-D. The increase in threshold for action potential generation secondary to denervation is suggested as the factor limiting the initiation of the repetitive discharges.[1]References
- Experimental myotonia induced in denervated muscles by 2,4-D. Eberstein, A., Goodgold, J. Muscle Nerve (1979) [Pubmed]
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