OCR Text |
Show 10 MR. E. J. SIDEBOTHAM ON THE [Jan. 20, Tibialis posticus.-Arises from inner part of posterior surface of shaft of fibula in its upper fifth, passes behind inner malleolus, and is inserted into inner and under surfaces of astragalus. Flexor longus digitorum.-Arises from inner border of posterior surface of fibula at its upper third and from interosseous membrane. Tendon joins inner border of tendon of flexor longus poliicis. Flexor longus poliicis.-Arises from whole of inner and posterior surfaces of fibula. The muscle is easily separable into two parts, the deep portion joining the tendon of the superficial in its lower fifth. The tendon divides into five slips, one of which passes to each of the toes. The tendon to the hallux comes off from the superficial part, and some of its fibres are directly continuous with those of the flexor longus digitorum. Four lumbricales are present, arising from single tendons and passing to tibial side of corresponding toe. The outer one is larger than the others. Accessorius -Arises from a ridge at outer border of lower surface of os calcis. It passes inwards and slightly forwards, and is chiefly inserted into tendon of flexor longus poliicis. Tibialis anticus.-A large muscle, arising from upper two fifths of outer surface of shaft of tibia. It is inserted into inner side of internal cuneiform. Extensor longus digitorum.-A small muscular belly, arising from inner side of ridge on anterior border of head of fibula. It divides into two tendons. Inner one again divides into three, which are inserted by two slips into bases of first phalanges of index, medius, and annularis. Outer tendon is similarly inserted into minimus. Tendon to annularis is connected by vinculae to adjoining tendons. Extensor longus poliicis.-Arises from upper half of shaft of fibula on its anterior aspect; passes obliquely to inner side of foot, and is inserted at base of first phalanx of great toe. Peroncus longus arises by two heads:-1. From posterior part of head of fibula and sesamoid bone. 2. From outer part of prominent ridge on anterior border of fibula, and septum between it and peroneus brevis. Peroneus quinti digiti lies between its two heads. Its tendon passes behind external malleolus into sole of foot, and is inserted into outer angle of metacarpal of great toe. Peroneus brevis.-Arises from anterior border of fibula just below prominent ridge and septa between it and peroneus longus and extensor longus digitorum. It is inserted into outer side of base of metacarpal of minimus. Peroneus quinti digiti.-Arises from external condyle of femur and external lateral ligament. Its long tendon passes behind external malleolus to he inserted into outer side of first phalanx of minimus. Peroncus quarti digiti.-Arises from upper third of anterior surface of fibula with exception of a small interval at top. Peroneus tertii digiti.-A very slender muscular belly, arising from outer side of fibula just below outer head of peroneus lon»us. Of the arrangement of these last two muscles I a m not certain. The former seemed in right foot to divide and to pass to outer sides of |