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FAST TO SLOW PHENOTYPIC CHANGES IN RABBIT MUSCLE CAN BE INDUCED WITHOUT INCREASES IN NEURAL ACTIVITY
1 Department of Physiology, Marischal College, University of Aberdeen, Aberdeen AB9 1AS
Immobilization of rabbit tibialis anterior (fast) musele in a lengthened position for
weeks led to a fivefold increase in the number of slow oxidative fibres. Unlike the situation in other models of phenotypic change in adult muscle, the increased expression of slow phenotype was not associated with an increase in the level of electrical activation, as monitored in the stretched muscles by chronic telemetric electromyography.
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