Mesotendons of digital flexor muscles and their vasculature.
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Biomedical subjects
Publications and source records attributed to S Gajisin.
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The arterial supply to the flexor tendons of the fingers was studied by means of angiography, by the injection of coloured latex, and by microdissection. It was established that there were no anastomoses between the intra-osseous circulation and that of the synovial sheath. Two separate sources of blood supply to the sheath were found: the digitopalmar arches and the specific arteries of the sheath. The findings indicate that the ideal location for incision into the digital sheath is in the midline of the palmar surface. The flexor tendons within the sheath are supplied only by branches of the digitopalmar arches. Considerable differences were observed in the details of blood supply of the tendon of flexor superficialis and that of flexor profundus.
In order to determine the incidence of Brachymesophalangia V, an inspectional and metrical analysis was made of radiographs of 67 Nama-speaking Hottentots aged 2 to 17.5 years, and 210 Rehoboth Basters (in Namibia) and Cape Colored children (near Cape Town) aged 1.5 to 21 years. None of the children displayed cone-shaped epiphysis or early union, and none showed Brachymesophalangia V. It was confirmed that the incidence of Brachymesophalangia V is considerably higher in Mongoloid populations than in Caucasoid or Negroid groups, including Hottentots.
In ten human hands the mesotendons of m. extensor digitorum longus and m. extensor indicis have been examined and described in detail. The various sources of their blood supplies have also been demonstrated and described.
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In addition to the four parasympathetic ganglia usually described in the head, many other microscopic parasympathetic ganglia have been observed in various regions of the cephalic territory. The cranial parasympathetic system is therefore diffuse as in the case of the sympathetic, although the neurones composing it are morphologically different.
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