|
The palmaris longus is seen as a small tendon between the flexor carpi radialis and the flexor carpi ulnaris, although it is not always present. The muscle is absent in about 14 percent of the population; however, this number varies greatly in African, Asian, and Native American populations. Absence of this muscle does not have an effect on grip strength. The palmaris longus muscle can be palpated by touching the pads of the fifth finger and thumb whilst flexing the wrist. The tendon, if present, will be visible in the midline of the anterior wrist. ==Structure== It is a slender, fusiform muscle, lying on the medial side of the flexor carpi radialis.〔''Gray's Anatomy'' (1918), see infobox〕 It arises from the medial epicondyle of the humerus by the common flexor tendon, from the intermuscular septa between it and the adjacent muscles, and from the antebrachial fascia.〔 It ends in a slender, flattened tendon, which passes over the upper part of the flexor retinaculum, and is inserted into the central part of the flexor retinaculum and lower part of the palmar aponeurosis, frequently sending a tendinous slip to the short muscles of the thumb.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Palmaris longus muscle」の詳細全文を読む スポンサード リンク
|