402 Harris Hawthorne Wilder, 



done, that is, as a fascia that furnishes attachment to niany muscles withoufc 

 being a definite part of any of them. (See also the remarks below, sub 

 plantar fascia.) 



M. palmaris superficialis (ps). This is a short, broad 

 muscle occupying the proximal half of the antebrachium, and is. 

 continued directly into the palmar fascia. It arises by fleshy fibers 

 from the medial condyle of the numerus, between the similar origins 

 of the radial and ulnar flexors. From their origin the fibers diverge 

 and form a broad belly, which inserts, when at its greatest breadth, 

 into the proximal margin of the palmar fascia. 



According to McMuRElCH this insertion is in reality between the 

 two layers which compose the fascia, these latter investing the muscle 

 upon both sides and forming the fascia by their union. 



M. palmaris profundus (jpp). This muscle arises in two 

 parts, separated almost completely by a narrow bündle of longitudi- 

 nal fibers, the ulnaricarpalis, a specially differentiated portion of 

 the same System. Both parts arise in the main along narrow lines 

 that run parallel to each other upon the radio-flexor aspect of the 

 shaft of the ulna, and continue across the surface of the ulnare- 

 intermedium; in addition to this some of the distal fibers of the 

 more ulnar portion arise from the side of the tendon of the ulnar 

 flexor, and still other fibers arise from the surface of carpale 4 + 5- 

 and connect the two portion s of the muscle. The muscle inserts 

 as two adjacent bundles into the dorsal (inner) surface of the palmar 

 fascia, covering a large area. 



M. ulnaricarpalis (uc). This muscle consists of a long: 

 narrow band, running lengthwise through the mass of flexor muscles 

 of the forearm. It arises along a line placed longitudinally upon the 

 shaft of the ulna, on the margin turned towards the radius, and 

 occupying its proximal half. It thus lies between the lines of origin 

 of Mm. pronator and palmaris profundus, and the muscle itself rests- 

 upon the former and parts the fibers of the latter into two bundles 

 on its way to its insertion. This latter occupies a small area in 

 the very middle of carpale 4 -f- 5, just proximal to the line of origins 

 of the Mm. carpo-metacarpalia. 



M. flexor ulnaris (fu, fu'). A large muscle, lying upon the 

 flexor surface of the ulna, and forming the ulnar contour of the 

 flexor side of the antebrachium. At its origin it consists of two 

 parts, which arise in contact with one another from the ulnar aspect 

 of the median condyle of the numerus. The more proximal of these 



