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25 Cards in this Set

  • Front
  • Back
Ischiocavernosus origin and insertion
origin: Ischial tuberosities; insertion: Crus of corpus cavernosa of male penis or female clitoris
Bulbospongiosus action
Empties male urethra; assists in erection of penis in males and of clitoris in females
Bulbospongiosus innervation
Pudental nerve
Sphincter Urethrae origin and insertion
origin: Ischiopubic rami; insertion: Midline raphe
Ischiocavernosus action
Retards venous drainage and maintains erection of penis or clitoris
Ischiocavernosus innervation
Pudental nerve
Deep Transverse Perineus origin and insertion
origin: Ischial rami; insertion: Midline central tendon of perineum; some fibers into vaginal wall in females
Sphincter Urethrae action
Constricts urethra; helps support pelvic organs
Sphincter Urethrae innervation
Pudental nerve
Coccygeus origin and insertion
origin: Spine of ischium; insertion: Sacrum and coccyx
Deep Transverse Perineus action
Supports pelvic organs; steadies central tendon
Deep Transverse Perineus innervation
Pudental nerve
Levator Ani origin and insertion
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
Coccygeus action
Supports pelvic viscera; supports coccyx and pulls it forward after it has been reflected posteriorly by defecation and childbirth
Coccygeus innervation
S4 and S5
Dorsal Interossei origin and insertion
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
Levator Ani action
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
Levator Ani innervation
S3, S4 and inferior rectal nerve (branch of pudental nerve)
Plantar Interossei origin and insertion
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
Dorsal Interossei action
Abduct (diverge) toes ; extend toes at interphalangeal joints and flex them at metatarsophalangeal joints
Dorsal Interossei innervation
Lateral plantar branch of tibial nerve
Flexor Digiti Minimi Brevis origin and insertion
origin: Base of metatarsal 5 and tendon of peroneus longs; insertion: Base of proximal phalanx of toe 5
Plantar Interossei action
Adductors of toes: pull toes in toward second digit; act with lumbricals to extend toes at interphalangeal joints and flex them at metatarsophalangeal joints
Plantar Interossei innervation
Lateral plantar branch of tibial nerve
Adductor Hallucis origin and insertion
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