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THE CONTRASTING TROPHIC CHANGES OF THE ANTERIOR AND POSTERIOR LATISSIMUS DORSI OF THE CHICK FOLLOWING DENERVATION
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1962
Year
Muscle FunctionAnatomyGross AnatomyKinesiologyMuscle InjurySkeletal MuscleUsual AtrophyAvian EvolutionHealth SciencesAnimal PhysiologyFast FibresSlow Muscle FibresContrasting Trophic ChangesMorphologyNervous SystemBiologyNeuroanatomyPhysiologyCentral Nervous SystemMedicineNeuromusculoskeletal DisorderComparative Physiology
In comparing the anterior latissimus dorsi (ALD) of the chick as an example of pure slow muscle with its companion fast muscle posterior latissimus dorsi (PLD), with respect to their reaction to denetwation, a striking difference between them has been found. After denervation while PLD manifests the usual atrophy, ALD not only does not atrophy but even shows hypertrophy. It has also been found that the two fibre components of the mixed muscle biventer cervicis of the chick show opposite changes of atrophy and hypertrophy after denervation. It thus appears that the nerve-muscle trophic relationship for the slow muscle fibres is very different from that for the fast fibres, at least in chick.