. Medical and surgical therapy. CERVlfAL (Afti-r Henry Meivo.) CERVICAL AND BRACHIAL PLEXUSES 129 contract. But in some positions a few of the fibres must relax;thus, whenever the arm is drawn forwards or inwards the posteriorfibres relax. Each of the fasciculi of the deltoid should be examined separately,both from the clinical and electrical points of view. The supraspinal us muscle lifts the humerus and draws it forwardsand outwards. Though much weaker than the deltoid, it is strongenough to raise the arm when the deltpidis completely atrophied. The infraspinatus and the teres minor
. Medical and surgical therapy. CERVlfAL (Afti-r Henry Meivo.) CERVICAL AND BRACHIAL PLEXUSES 129 contract. But in some positions a few of the fibres must relax;thus, whenever the arm is drawn forwards or inwards the posteriorfibres relax. Each of the fasciculi of the deltoid should be examined separately,both from the clinical and electrical points of view. The supraspinal us muscle lifts the humerus and draws it forwardsand outwards. Though much weaker than the deltoid, it is strongenough to raise the arm when the deltpidis completely atrophied. The infraspinatus and the teres minor are one and the samemuscle, physiologically, and rotate the head of the humerus out-wards. The subscapularis, on the contrary, rotates the arm inwards. These three last-named muscles assist in the movements of supina-tion and pronation, as we have already said in studying the lesionsof the musculo-spiral and median nerves. The pectoralis major when fully contracted adducts and simul-taneously draws the arm forward. In studying the action of thi
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Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjecttherapeutics
