. Cunningham's Text-book of anatomy. Anatomy. 412 THE MUSCULAE SYSTEM. Nerve-Supply.—Obturator nerve (L. 2. 3.). Actions.—The muscle adducts and assists in flexing the thigh. M. Adductor Brevis.—The adductor brevis is a large muscle which arises from an elongated oval surface on the front of the body and upper part of the inferior ramus of the pubic bone, surrounded by the other muscles of this group (Fig. 366). Directed distally and laterally the muscle expands, to be inserted by a short aponeurotic tendon, behind the insertion of the pectineus, into the distal two- thirds of the line leading
. Cunningham's Text-book of anatomy. Anatomy. 412 THE MUSCULAE SYSTEM. Nerve-Supply.—Obturator nerve (L. 2. 3.). Actions.—The muscle adducts and assists in flexing the thigh. M. Adductor Brevis.—The adductor brevis is a large muscle which arises from an elongated oval surface on the front of the body and upper part of the inferior ramus of the pubic bone, surrounded by the other muscles of this group (Fig. 366). Directed distally and laterally the muscle expands, to be inserted by a short aponeurotic tendon, behind the insertion of the pectineus, into the distal two- thirds of the line leading from the lesser trochanter of the femur to the linea aspera, and to the proximal fourth of the linea aspera itself (Fig. 365, p. 410). Nerve-Supply.—Obturator nerve (L. 2. 3. 4). Actions.—The muscle adducts and flexes the thigh. - Rectus femoris (straight head of origin) . Rectus femoris (reflected head of origin) . Attachment of ilio-femoral ligament Pyramidalis abdominis (origin) \Rectus abdominis (origin). Gracilis (origin) Adductor brevis origin) Semimembranosus (origin) Quadratus femoris (origin) Biceps and semitendin osus (origin) Fig. 366.—Muscle-Attachments to the Outer Surface of the Right Pubis and Ischium. M. Adductor Magnus.—The adductor magnus, the largest of the adductor group, is a roughly triangular muscle arising mainly by fleshy fibres by a curved origin from the lower part of the lateral border and a large portion of the adjoin- ing inferior surface of the sciatic tuberosity, from the edge of the inferior ramus of the ischium, and from the anterior surface of the inferior ramus of the pubic bone, its most anterior fibres arising between the obturator externus and adductor brevis (Fig. 366). Its upper fibres are directed horizontally and laterally from the pubic bone towards the proximal part of the femur; the lowest fibres are directed distally from the sciatic tuberosity to the medial condyle of the femur; while the intermediate fibres radiate
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