. Medical and surgical therapy. portions. The short iKjrtionis attached to the upper extremity of the first phalanx on the sidecorres[)on(ling to the metacarpal bone, where the insertion of thisnuiscle is more widespreiul ; the long portion expands into a long,wide meiubrano which ends in the toiulon of the eornxspondingextensor from the first phalanx to the terminal. 92 CLINICAL FORMS OF NERVE LESIONS With this long head of the terminal .tendon of the interossei thetendon of the lumbricales unites. The interossei are very powerfxil muscles. Their two chief func-tions are: (1) they flex the fi
. Medical and surgical therapy. portions. The short iKjrtionis attached to the upper extremity of the first phalanx on the sidecorres[)on(ling to the metacarpal bone, where the insertion of thisnuiscle is more widespreiul ; the long portion expands into a long,wide meiubrano which ends in the toiulon of the eornxspondingextensor from the first phalanx to the terminal. 92 CLINICAL FORMS OF NERVE LESIONS With this long head of the terminal .tendon of the interossei thetendon of the lumbricales unites. The interossei are very powerfxil muscles. Their two chief func-tions are: (1) they flex the first phalanx on the metacarpal andextend the second and terminal phalanges (fig. 37); (2) they abductand adduct the fingers. The movement of adduction requires muchenergy, especially if the fingers are in extension. The lumbricales also flex the first phalanges and extend the othertwo. The first lumbrical is the only one that exercises any lateralmovement, and is only a very weak abductor of the first phalanxof the index
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Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjecttherapeutics
