Tapeworm Grillotia erinaceus (van Beneden, 1858) (Cestoda: Trypanorhyncha) Ultrastructural Organization of the Surface Tegument and Rhyncheal System: Skeletal System

Author(s):  
Natalia Biserova
2020 ◽  
pp. 63-83
Author(s):  
E. N. Tsimbaeva

The article analyzes physical and physiological problems caused by fashionable clothing in the mid-18th to early 20th cc. that shaped people’s appearances and lifestyles in the past. Affecting the skeletal system and the functioning of internal organs and brain in particular and causing various illnesses, these problems went largely unrecognized by contemporaries, including writers, but would inevitably surface in literary works as part and parcel of everyday life. Without understanding their role, one may struggle to comprehend not only plot twists and characters’ motivations but also the mentality of the bygone era as portrayed in fiction. Chronologically, the research covers the period from the mid-18th c. to World War I. The author only focuses on so-called respectable society (a very tentative term that covers members of the aristocracy and other classes with comparable lifestyles), since it was this group which drew the most attention from fiction writers of the period. The scholar chose to concentrate on the kind of daily realia of ‘noble society’ that permeate works by Russian, English, French and, to some extent, German authors, considered most prominent in Europe at the time.


Author(s):  
Z. M. Yaschyshyn ◽  
S. L. Popel

The aim: to study the dynamics of histological and ultrastructural changes in muscle fibers and their neuromuscular endings under conditions of prolonged hypokinesia at different stages of ontogenesis. Methods. Studied skeletal muscles and their peripheral nervous apparatus of laboratory male Wistar rats aged 30 to 270 days. The restriction of motor activity was carried out in special canister cells for 30, 60, 90, and 240 days (5 animals for each term). To determine the type of muscle fiber, the Nahlas histochemical method was used, the Kulchitsky method was used to detect myelinated nerve fibers, the Bilshovsky-Gros method and the electron microscopic method to identify neuromuscular endings. Results. The data of histological and electron microscopic examination of skeletal muscle fibers and their neuromuscular endings under conditions of prolonged hypokinesia indicate their regular restructuring during the development of muscles, the formation of their synapses and structures that are associated with them at different stages of ontogenesis. Conclusion. The study provides an in-depth understanding of the relative frequency and nature of the disturbance of the neuromuscular endings during prolonged hypokinesia and its effect on the dynamics of structural adjustment of individual types of muscle fibers in ontogenesis.


Author(s):  
Z. M. Yaschyshyn ◽  
S. L. Popel

The aim: to study the dynamics of histological and ultrastructural changes in muscle fibers and their neuromuscular endings under conditions of prolonged hypokinesia at different stages of ontogenesis. Methods. Studied skeletal muscles and their peripheral nervous apparatus of laboratory male Wistar rats aged 30 to 270 days. The restriction of motor activity was carried out in special canister cells for 30, 60, 90, and 240 days (5 animals for each term). To determine the type of muscle fiber, the Nahlas histochemical method was used, the Kulchitsky method was used to detect myelinated nerve fibers, the Bilshovsky-Gros method and the electron microscopic method to identify neuromuscular endings. Results. The data of histological and electron microscopic examination of skeletal muscle fibers and their neuromuscular endings under conditions of prolonged hypokinesia indicate their regular restructuring during the development of muscles, the formation of their synapses and structures that are associated with them at different stages of ontogenesis. Conclusion. The study provides an in-depth understanding of the relative frequency and nature of the disturbance of the neuromuscular endings during prolonged hypokinesia and its effect on the dynamics of structural adjustment of individual types of muscle fibers in ontogenesis.


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