title: Classification of muscle fiber types based on succinic dehydrogenase and myofibrillar ATPase reactions in normal and randomly reinnervated rat skeletal muscles.
abstract: In the normal and randomly reinnervated plantaris muscle of rat staining for succinic dehydrogenase (SDH) activity differentiates three fiber types (A, B and C), staining for myofibrillar adenosine triphosphatase (ATPase) differentiates three fiber types (alpha, beta and alpha beta). Here we present our finding type A corresponds to alpha beta fibers, B to beta or alpha beta, C to alpha or alpha beta. In normal soleus muscle both classifications were found to be compatible and B fibers correspond to beta and C to alpha fibers. An exception is the small percent of alpha beta fibers which correspond to B type. In randomly reinnervated soleus muscle changes in ATPase activity are not followed by changes in SDH staining and B fibers correspond to alpha, beta or alpha beta types.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism; D000818:Animals; D006651:Histocytochemistry; D008297:Male; D009132:Muscles / Q000201:enzymology* / Q000294:innervation; D009210:Myofibrils / Q000201:enzymology*; D051381:Rats; D012584:Sciatic Nerve / Q000201:enzymology; D013385:Succinate Dehydrogenase / Q000378:metabolism*
chemical_list: D013385:Succinate Dehydrogenase; D000251:Adenosine Triphosphatases