Identifier: medicalsurgicalt02good (find matches)
Title: Medical and surgical therapy
Year: 1918 (1910s)
Authors: Goodwin, T. H. (Thomas Herbert), b. 1871, ed Keogh, Alfred, Sir, 1857-1936, ed
Subjects: Medicine, Military Military Medicine Surgery
Publisher: New York : D. Appleton
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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Fig. 36.—Plan of insertion of theinterossei. Fig. 37.—Principal movementof the interossei muscles (flex-ion of the first phalanx, ex-tension of second and third). There are four muscles in the hypothenar eminence: palmxiris hrevis,abductor minimi digiti, flexor brevis minimi digiti, and opponensminimi digiti (fig. 19), but they are insignificant in comparisonwith the corresponding muscles of the thumb. The palmaris brevis is merely superficial, and, like most of thecutaneous muscles not affecting voluntary movements, does notcall for further comment. The abductor minimi digiti inclines the little finger to the ulnarborder, drawing it away from the centre of the hand : some ana-tomists call it the adductor because it draws the little finger towardthe median line. It assists the flexor brevis minimi digiti in flexingthe proximal phalanx of the little finger on its corresponding meta-carpal bone. Clinical Forms of Xerve Lesion.^.) (To farr pa<jr 92.
Text Appearing After Image:
PLATE 111. Nerves of hand and fingers, palmar aspect.(After Henry Meige.) THE ULNAR NERVE 93 The opponens minimi digiti draws forwards and outwards thefifth metacarpal bone, and the little finger with it, without impartingany visible rotatory movement to that bone. Finally, the ulnar nerve supplies the adduclor poUicia and theinner head of the flexor hrevis pollicis, sometimes called the tiooinner sesamoid miisdes of the thumb, which are analogous in action.The adductor slightly flexes the fiirst phalanx, tilts it on its innerborder, and at the same time gives it a movement of rotation onits long axis—the opposite of the movement made by the outersesamoids ; with the result that the first metacarpal is drawn out-wards and a little in front of the second. The adductor, in addition,extends the second phalanx of the thumb on the first, so that whenthis muscle is fully contracted the first metacarpal is on a levelwith the second, the second phalanx of the thumb in extension,and the prox

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