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25 Cards in this Set
- Front
- Back
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Ischiocavernosus origin and insertion
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origin: Ischial tuberosities; insertion: Crus of corpus cavernosa of male penis or female clitoris
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Bulbospongiosus action
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Empties male urethra; assists in erection of penis in males and of clitoris in females
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Bulbospongiosus innervation
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Pudental nerve
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Sphincter Urethrae origin and insertion
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origin: Ischiopubic rami; insertion: Midline raphe
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Ischiocavernosus action
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Retards venous drainage and maintains erection of penis or clitoris
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Ischiocavernosus innervation
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Pudental nerve
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Deep Transverse Perineus origin and insertion
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origin: Ischial rami; insertion: Midline central tendon of perineum; some fibers into vaginal wall in females
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Sphincter Urethrae action
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Constricts urethra; helps support pelvic organs
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Sphincter Urethrae innervation
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Pudental nerve
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Coccygeus origin and insertion
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origin: Spine of ischium; insertion: Sacrum and coccyx
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Deep Transverse Perineus action
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Supports pelvic organs; steadies central tendon
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Deep Transverse Perineus innervation
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Pudental nerve
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Levator Ani origin and insertion
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origin: Extensive linear origin inside pelvis from pubis to ischial spine; insertion: Inner surface of coccyx, levator ani of opposite side, and (in part) into the structures that penetrate it
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Coccygeus action
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Supports pelvic viscera; supports coccyx and pulls it forward after it has been reflected posteriorly by defecation and childbirth
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Coccygeus innervation
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S4 and S5
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Dorsal Interossei origin and insertion
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origin: Sides of metatarsals; insertion: Extensor expansion over first phalanx of toes 2-4 on side opposite midaxis of foot (toe 2), but on both sides of toe 2
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Levator Ani action
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Supports and maintains position of pelvic viscera; resists downward thrusts that accompany rises in intrapelvic pressure during coughing, vomiting, and expulsive efforts of abdominal muscles; forms sphincter at anorectal junction and vagina
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Levator Ani innervation
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S3, S4 and inferior rectal nerve (branch of pudental nerve)
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Plantar Interossei origin and insertion
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origin: The side of each metatarsal that faces the midaxis of the foot (metatarsal 3, where it’s absent); insertion: Extensor expansion on first phalanx of each toe (except toe 2), on side facing midaxis of foot
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Dorsal Interossei action
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Abduct (diverge) toes ; extend toes at interphalangeal joints and flex them at metatarsophalangeal joints
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Dorsal Interossei innervation
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Lateral plantar branch of tibial nerve
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Flexor Digiti Minimi Brevis origin and insertion
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origin: Base of metatarsal 5 and tendon of peroneus longs; insertion: Base of proximal phalanx of toe 5
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Plantar Interossei action
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Adductors of toes: pull toes in toward second digit; act with lumbricals to extend toes at interphalangeal joints and flex them at metatarsophalangeal joints
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Plantar Interossei innervation
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Lateral plantar branch of tibial nerve
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Adductor Hallucis origin and insertion
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origin: From bases of metatarsals 2-4 and from peroneus longus tendon (oblique head); From a ligament across metatarsophalangeal joints (transverse head); insertion: Base of proximal phalanx of big toe, lateral side
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