Heath's practical anatomy : a manual of dissections / [Christopher Heath].

  • Christopher Heath
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: Heath's practical anatomy : a manual of dissections / [Christopher Heath]. Source: Wellcome Collection.

    61/800 page 39
    the humerus ; but the anterior fibres will assist in flexion and internal rotation, and the posterior in extension and external rotation of the shoulder-joint. It is supplied by the circumflex nerve. [The deltoid is to be divided near its origin and turned down, the circumflex vessels and nerve being preserved. In doing this a large Fig. 14. bursa lying between the deltoid and the shoulder-joint should be noticed. The remains of the trapezius muscle are to be cut close to ^ the spine of the scapula, and the thin fascia covering the muscles above and below it removed, the humerus being rotated inwards to put their fibres on the stretch.] The Sub-aeromial Bursd lines the interval between the upper part of the shoulder-joint and the under surface of the deltoid, acromion process, and coraco-acromial ligament. It thus forms an extensive sac, the enlargement of which may be confounded with disease of the joint. Physiologically it represents a synovial lining Fig. 14.—Plan of the deltoid (after Cunningham). 1. Upper tendinous intersections aris- 5. Lower tendinous intersections re- ing from acromion^ ceiving three of the upper seg- 2. Clavicular ffBresT ments of the muscle and inserted 3. Spinous fibres.. into humerus. 4. Lower segments.
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