BIOMORPHOLOGY OF MUSCLE ACTING ON THE SHOULDER JOINT OF SOME FALCONIFORMES
Abstract
Among the representatives of the class of birds in the subclass of
modern or Neornithes birds, as well as in other terrestrial vertebrates several
groups of muscles act on the shoulder joint. These are some muscles of the
shoulder girdle, starting from the trunk and ending on the shoulder bone, the
muscles of the shoulder joint and the part of elbow joint muscles. Proceeding from
the above, we divided the muscles acting on the shoulder joint into the trunk-shoulder group, the muscle group of the shoulder joint and the elbow muscles. In
birds, there are some features in degrees of differentiation and development of
muscles acting on the shoulder joint. The common opinion is that such features are
related to adaptation to flight. Our studies have shown that thoracic and
supracoracoideus muscles in the studied species of birds have similar locations,
but also have peculiarities. Investigated shows a number of Falconiformes
(common buzzard, rough-legged hawk, eurasian sparrowhawk, northern goshawk)
are characterized by adaptation to the rapid active flight, which imposes its imprints
on the degree of development and differentiation of the muscles acting on the
shoulder joint. The investigated species of birds are characterized by different
biomorphological adaptations due to the adaptation to different types, speed and
duration of the flight.
Keywords: biomorphology, muscles, humerus, birds, buzzard,
Falconiformes, common buzzard, rough-legged hawk, eurasian
sparrowhawk, northern goshawk
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