PMID- 7771703 OWN - NLM STAT- MEDLINE DCOM- 19950706 LR - 20081121 IS - 0002-9645 (Print) IS - 0002-9645 (Linking) VI - 56 IP - 3 DP - 1995 Mar TI - Histochemical and morphometric study of fiber types in ten skeletal muscles of healthy young adult cats. PG - 349-57 AB - A histochemical and morphometric study of fiber types in a variety of skeletal muscles of healthy young adult cats was undertaken to provide normative data not available previously. Using a standardized system of nomenclature, fiber types 1, 2A, 2B, and 2C were identified in most cat muscles on the basis of myosin ATPase staining at pH 4.45. Type-2M fibers were present in temporalis (TEM) and masseter (MAS) muscles. Type-1 fibers predominated in medial head of triceps (MHT) and soleus muscles. Type-2B fibers were dominant in biceps femoris, lateral head of gastrocnemius cranial tibial, long head of triceps, and superficial digital flexor muscles; type-2A fibers were dominant in buccinator muscle samples; and type-2M fibers were dominant in TEM and MAS muscles. Numbers of type-2C fibers did not exceed 2 to 3% of the myofiber population in any muscle. In CT and LHT muscles, a gradient of fiber type distribution was observed, with significant (P < 0.05) increase in numbers of type-1 and type-2A fibers in deeper regions of the muscles. The distribution of fiber types was compartmentalized in MHT and MAS specimens. Diameter of type-2B fibers was significantly (P < 0.05) larger than that of type-1 and type-2A fibers in biceps femoris, lateral head of gastrocnemius, cranial tibial, long head of triceps, and superficial MHT muscles. Diameter of type-2M fibers was significantly (P < 0.05) larger than that of type-1 fibers in TEM and MAS muscles. The soleus type-1 muscle fibers were the largest fibers encountered in any muscle.(ABSTRACT TRUNCATED AT 250 WORDS) FAU - Braund, K G AU - Braund KG AD - Neuromuscular Laboratory, Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, AL 36849, USA. FAU - Amling, K A AU - Amling KA FAU - Mehta, J R AU - Mehta JR FAU - Steiss, J E AU - Steiss JE FAU - Scholz, C AU - Scholz C LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Vet Res JT - American journal of veterinary research JID - 0375011 RN - EC 3.6.1.- (Adenosine Triphosphatases) SB - IM MH - Adenosine Triphosphatases/analysis MH - Animals MH - Cats/*anatomy & histology/metabolism MH - Female MH - Histocytochemistry MH - Male MH - Muscle Fibers, Skeletal/chemistry/*classification/*cytology MH - Muscle, Skeletal/*anatomy & histology/chemistry MH - Reference Values EDAT- 1995/03/01 00:00 MHDA- 1995/03/01 00:01 CRDT- 1995/03/01 00:00 PHST- 1995/03/01 00:00 [pubmed] PHST- 1995/03/01 00:01 [medline] PHST- 1995/03/01 00:00 [entrez] PST - ppublish SO - Am J Vet Res. 1995 Mar;56(3):349-57.