[Structural organization of the human masticatory muscle in case of mandible immobilisation].

The data of microscopic, ultramicroscopic and quantitative analyses of the masticatory skeletal muscles were presented of 20 patients with lower jaw's fracture after 3-24 days of splinting. Some manifestations of extensive damages of musculature connected with a specific time span of immobilization and type of muscle fibers. An energy-giving apparatus, presented with mitochondria, a repository of calcium ions, formed with cisternae of sarcoplasmic reticulum, were significantly changed than contractile apparatus of muscle fibers.

[Morphometric and stereometric analysis of the masticatory muscles in cases of progeny].

The data of microscopic and ultramicroscopric analysis of the muscles of mastication were presented of 12 male patients with progeny. There were determined differentiating peculiarities of muscles fibers of masseter and medial pterygoid in cases of progeny. The results of comperative analysis showed some decreasing of muscular quota and increasing connective tissue's quota; some decreasing muscular fibers' diameters and quantity of blood capillaries; some increasing muscular fibers type I in the muscles of mastication in progeny cases.

[Morphological and biochemical changes in red and white muscle fibers in skeletal musculature ischemia]. / Morfobiokhimicheskie izmeneniia v krasnykh i belykh myshechnykh voloknakh pri ihemii skeletnoi muskulatury.

Structural reorganizations of red and white muscular fibres and peculiarities of changes in phosphoinositides in conditions of total ischemia of skeletal musculature were studied. On the whole morphological and biochemical changes were of the same type. However, decrease of phosphoinositides was more significant in white fibres than in red ones. In white muscular fibres deformations concerned myofibrillar apparatus while in red fibres mitochondrial apparatus was damaged.

[The content of phosphoinositides in the biological membranes of different types of muscle fibers]. / Soderzhanie fosfoinozitidov v biologicheskikh membranakh myshechnykh volokin razlichnykh tipov.

The content of phosphoinositids in biomembranes of slow (m.soleus) and fast (m. extensor digitorum longus) twitch muscular fibres (MF) was studied. Biochemical differences in different MF of fast and slow muscles were detected. The content of phosphotidylinosites in plasma membranes, mitochondrial and sarcoplasmic reticulum membranes of fast twitch MF was on average 1.28 times higher than in slow ones. The predominance of phosphatidylinositol-3,4,5-triphosphates in fast twitch MF over slow twitch MF was noted. The content of phosphatidylinoitol-3,4,5-triphosphates in plasma membranes, mitochondrial and sarcoplasmic reticulum membranes of slow twitch MF was 3, 2.35 and 1.25 times higher than in fast twitch MF. It was found that phosphoinositide content in biomembranes of different type MF was unequal which may be used to improve the expansion of understanding of the role of intracellular mediators in MF phenotype regulation.