title: Variations in intrafusal fiber size within histochemically identified types of intrafusal fibers in the pigeon.
abstract: The myofibrillar adenosine triphosphatase reaction with acid preincubation allowed the identification of three types of intrafusal fibers in pigeon flexor carpi ulnaris muscle spindles. Measurements of cross-sectional areas at the polar region showed much overlap in fiber size among populations of each type.
mesh_terms: D000251:Adenosine Triphosphatases / Q000032:analysis; D000818:Animals; D010856:Columbidae / Q000033:anatomy & histology*; D009470:Muscle Spindles / Q000033:anatomy & histology* / Q000201:enzymology; D009210:Myofibrils / Q000201:enzymology
chemical_list: D000251:Adenosine Triphosphatases