The Pedestrian's Record

2 1 4 THE PEDESTRIAN'S RECORD. their namesindicate. These muscles possessan extensive line of origin, and the tendons of insertion join together at the lower end of the thigh, formingone singletendon ofinsertion, which is fixed in the forepart of the tibia. The patella is contained in this tendon. The action of these muscles is to extend the leg upon the thigh. The rectus and sartorius assist in keeping the body erect, andin drawing the trunk forward. The great develop­ ment of these muscles is oftena very marked muscular feature amongst athletes who train for running, andtheir tonicity is a great adjuvantin promoting pace and in keeping the body in a straight line during rapid progression. ANTERIOR MUSCLES OF THE LEG. On the bones of the leg, the tibia and fibula,we notice three long muscles located in the intervening space occurring between them, viz., tibialisanticus, extensorproprius pollicis, andexten­ sor communis digitorum. Tibialis anticus arises from a tuberosity on the outside of the tibia, and is inserted intothe tarsaland metatarsalbones. Extensor proprius pollicis, the .special extensor of the great toe, is placed on the forepart of the leg. It arises from the narrow part of the inner surface of the fibula, and passes down the leg and through a portion of a ligament named the annular, over the dorsum of the foot, and is inserted into the second phalange of the great toe. Extensor longus digitorum extends from the head of the tibia to thetoes ; butpreviously to its introduction on the phalanges of the foot forms four, if not five, tendinous prolongations which are inserted into the pedal phalanges. Sharpey says this muscle has only four tendons, althoughCooper ascribed to it five. The fifthbelongs to theperonus tertius. Actions. These muscles extend the digital phalanges, and have the power of bending the foot upon the leg. These actions.