[Comparative studies on looking into lacertus fibrosis and aponeurosis of the bicipitis brachii muscle as well as assessment of the biceps brachii and bracialis muscles in sheep, goats and wild deer].

In 34 anatomical specimens of sheep, goat and fallow deer the development of the cranial brachial and antebrachial fascia as well as the occurrence of a lacertus fibrosus and of structures, that are homologous with the aponeurosis m. bicipitis brachii hominis, were studied. Additionally, the attachments of the m. biceps brachii and the m. brachialis were dissected. In sheep, goat and fallow deer the superficial layer of the fascia brachii et antebrachii is weakly developed. Its deeper stratum, originating in the tuberositas deltoidea as well as in the crista humeri, and on the forearm interspersing with the fascia of the m. extensor carpi radialis, is of a more robust composition. In goat and fallow deer a remarkable ligamentous bracing of this fascial layer stresses its cranial aspect. The lacertus fibrosus intermingles in all three species with the cranial fascia antebrachii respectively with the tendon of the m. extensor carpi radialis. While in sheep and goat its emergence from the m. biceps brachii is obviously bipartite, in fallow deer this part of the lacertus fibrosus is undivided. Moreover, in all three species a muscular and/or tendinous connection between the m. biceps brachii and the m. pronator teres exists, that is homologous with the aponeurosis m. bicipitis brachii hominis. In sheep, goat and fallow deer the m. biceps brachii attaches with each one tendon to the tuberositas radii and the processus coronoideus med. ulnae. Frequently in sheep, but rarely in goat the ulnar tendon extends its area of attachment to the radius.(ABSTRACT TRUNCATED AT 250 WORDS)