[Haemorrhages, directly and indirectly in origin, localised in the musculus sternocleidomastoideus. (Contribution towards the angio-architecture of the skeletal muscle) (author's transl)]

Abstract

Haemorrhages in skeletal muscle--as in this case the musculus sternocleidomastoideus--caused by direct and local impact very often have a patchy form. They are produced not only by lesions of capillaries, small veins, and small arteries, but also by damage of muscle fibres. Indirect impact stretches muscle fibres and blood vessels very much, far away from the locality of direct impact. By this maximal stretching a protection mechanism is abolished, which exists by of the different angles of a blood vessel and its small vessel branches off, adapted to the distance of contraction and stretching and by the thickened connective tissue surrounding the vessels. Thus, blood vessels may be torn, especially such vessels that branch off nearly at a right angle. Blood will then flow into the small areas of connective tissue surrounding the vessels, and bleedings occur in form of stripes.