Avtor/Urednik		Travnik, L; Pernuš, F; Eržen, I
Naslov		Histochemical and morphometric characteristics of the normal human vastus medialis longus and vastus medialis obliquus muscles
Tip		članek
Vir		J Anat
Vol. in št.		Letnik 187, št. 2
Leto izdaje		1995
Obseg		str. 403-11
Jezik		eng
Abstrakt		The histochemical and morphometric characteristic of the vastus medialis longus and vastust medialis obliquus muscles were studied and compared with data on vastus lateralis. Cross-section of autophsied mucles from 9 healthy men, aged 18-44 y, who had died suddenly were analysed. Data were obtained on proportions, crosss-sections diameter, and on atrophy and hypertrophy factors, of type 1, 2a, 2b and 2c fibres. The analysis showed that the anatomical differences and the different functional demands placed on vastus medialis longus and vastus medialis obliquus are also expressed in different proportionsand sizes of fibre types in the two muscles. The proportion of type 1 fibres was significant higher (P less th. 0.01), and the proportion of 2b fibres was significant lower (P less th. 0.01) in vastus medialis longus than in vastus medialis obliquus. The diameter of type 1 and type 2a fibres were significantly smaller (P less th. 0.01) in vastus medialis longus than in vastus medialis obliquus, although the difference were small. Within muscles a nonrandom arrangenment of fibre types existed with the deeper portions of the muscles having more type 1 fibres than the more superficial portions. The histochemical and morphometric characteristic of vastus lateralis and vastus medialis obliquus show great similarity, reflecting the common function of both muscles which is taking part in transverse knee stability. Estimates of the limits of normality of the proportion, diameter, atrophy andhypertrophy factors of type 1, 2a, 2b and 2c fibres might be usefull in obtaining information on how different physiological conditions influence the proportion and size of different fibre types. This information could also be helpful in planning of specific muscle training programmes with the purpose of restoring normal muscle function.
Deskriptorji		MUSCLE, SKELETAL MUSCLE FIBERS ADOLESCENCE ADULT LEG MYOSIN ATPASE HISTOCYTOCHEMISTRY