File:Applied anatomy and kinesiology; the mechanism of muscular movement (1919) (14759425146).jpg

Identifier: appliedanatomyk00bowe (find matches)
Title: Applied anatomy and kinesiology; the mechanism of muscular movement
Year: 1919 (1910s)
Authors: Bowen, Wilbur Pardon, 1864-1928
Subjects: Exercise Muscles Physical education and training
Publisher: Philadelphia, Lea & Febiger
Contributing Library: Robarts - University of Toronto
Digitizing Sponsor: University of Toronto

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
impossible to grasp an object forcibly between theends of the thumb and fingers and so interferes seriously with someof the finer uses of the hand, such as sewing, knitting, drawing,painting, etc. It has little or no influence on the other joints of thethumb. The two short flexors of the thumb lie side by side in the thenareminence, the flexor brevis toward the palm and the flexor ossismetacarpi pollicis external to it and toward the wrist (Fig. 88).The abductor pollicis covers most of the two, but a small part ofthe flexor brevis projects from under its palmar edge. FLEXOR BREVIS POLLICIS. This is the inner of the two short flexors. Origin.—^The trapezium and the front side of the annular ligament.Insertion.—Base of the first phalanx of the thumb.Action.—Flexion of the first phalanx, and movement of the entirethumb toward the little finger. 152 MOVEMENTS OF THE HAND FLEXOR OSSIS METACARPI POLLICIS. Formerly called the opponens pollicis or opposing muscle ofthe thumb (Fig. 88).
Text Appearing After Image:
Fig. 88.—Muscles of the right palm. (Gerrish.) ADDUCTOR POLLTCIS 153 Origin.—The trapezium and the annular ligament. Insertion.—The shaft of the metacarpal bone on its radial side. Action.—Flexion and inward rotation of the metacarpal, and withit the whole thumb. By its use the tip of the thumb can be made tomeet the tips of the four fingers in turn. The two remaining short muscles of the thumb are the abductorand adductor pollicis, corresponding closely to the interossei of thefingers. ABDUCTOR POLLICIS. This is the most superficial muscle of the ball of the thumb and ison the side of the thumb opposite the first finger (Fig. 85.) Origin.^—The trapezium and scaphoid bones and the annularligament. Insertion.—The outer surface of the base of the first phalanx ofthe thumb and into the tendon of the extensor longus pollicis. Action.—To draw the thumb away from the first finger, move thesecond phalanx laterally, and to extend the last phalanx. At thesame time it rotates the

Note About Images