Licence: Public Domain Mark
Credit: Practical anatomy. Source: Wellcome Collection.
Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.
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![sal branch (20) which turns backwards beneath the tendon of the flexor carpi ulnaris to be distributed to the back of the little and half the ring finger. A cutaneous palmar branch of small size arises close above the annular ligament, and is distributed to the skin of the palm of the ulnar side. The Radial Nerve (Fig. 13, 13) is seen to arise from the musculo-spiral nerve opposite the elbow. It lies at first upon the supinator brevis, to tLe outer side of, and at some little distance from, the radial artery, but in the mid- dle third of the arm it is in close relation with the artery [to its radial side (see rule, p. 48)] on the pronator teres, finally passing beneath the tendon of the supinator longus to the back of the [fore] arm and hand. Palm of the Hand. Surface-Marking.—The delicacy of the skin of the palm will depend very much upon the previous occupation of the individual, but in every case it will be found to pre- sent no hairs and to be ribbed by the rows of papilla?, upon which the orifices of the sweat-ducts can be seen with a magnifying glass. If decomposition has advanced rapidly, the cuticle will probably be detached in part, when upon examining its deep surface, depressions corresponding to the papilla? will be found. A fulness on each side of the palm corresponds to the special muscles of the thumb and little finger respective!}', and the terms thenar [or volar] and li3Tpo-thenar are sometimes applied to them. The palm presents three curved lines, the proximal [linea vitalis or line of life in cheiromancy] and distal [linea mensalis or line of fortune] ones being curved in opposite directions, whilst the middle [linea naturalis or cephalica or line of health] runs obliquely across the palm to join the proximal line at the outer side of the hand. It will be found on dis- section that the point to which the superficial palmar arch reaches, corresponds pretty accurately with the centre of this middle line [rather, with a transverse line from the web of the thumb], whilst the point of bifurcation of the digital arteries is midway between the distal or anterior line and the web of the fingers. An incision is to be made down the middle of the palm to the roots of the fingers, where another is to be drawn across the width of the whole hand, and the two flaps of skin are to be dissected up and](https://iiif.wellcomecollection.org/image/b21020735_0065.jp2/full/800%2C/0/default.jpg)
