A manual of diseases of the nervous system . Fia. 8.—Paralysis of the serratus magnus;aversion and rotation of scapula whenthe arm is put forwards. 30 ACTfON AND PARALYSIS OF Fl». 9.—Paralysis of right deltoid; ele-v;ition of shoulder by trapezius on anattempt to raise the arm, which isslightly abducted by the supraspinatus. in) that the deltoid, acting alone, would cause. In paralysis, abduction of thearm, direct, forwards, and backwards is almost lost. All the abduction that remains is a trifling movement bythe supraspinatus. An attempt toabduct results in rotation of the sca-pula
A manual of diseases of the nervous system . Fia. 8.—Paralysis of the serratus magnus;aversion and rotation of scapula whenthe arm is put forwards. 30 ACTfON AND PARALYSIS OF Fl». 9.—Paralysis of right deltoid; ele-v;ition of shoulder by trapezius on anattempt to raise the arm, which isslightly abducted by the supraspinatus. in) that the deltoid, acting alone, would cause. In paralysis, abduction of thearm, direct, forwards, and backwards is almost lost. All the abduction that remains is a trifling movement bythe supraspinatus. An attempt toabduct results in rotation of the sca-pula and elevation of the shoulder(Fig. 9) from an excessive innervationof the associated trapezius and ser-ratus, which, as we have seen, fix thescapula when the deltoid acts. Para-lysis of single parts of the deltoidcauses loss of the corresponding move-ments of the arm, but if the middlepart only is paralysed, there is still alimited power of direct abduction bythe conjoined contraction of the ante-rior and posterior parts, aided by thesupraspinatus. The Supraspinatus (suprascapularnerve) abducts the arm, moves it for-wards, and rotates it in. It thus aidsthe deltoid. Isolated
Size: 1571px × 1591px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnervoussystem, bookye
