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55 Cards in this Set

  • Front
  • Back
External abdominal oblique origin
external surfaces of 5th-12th ribs
External abdominal oblique insertion
linea alba

pubic tubercle

anterior half of iliac crest
External abdominal oblique innervation
motor fibers in T7-T12 and the iliohypogastric nerve
Internal abdominal oblique origin
thoracolumbar fascia

anterior two thirds of iliac crest

connective tissue deep to lateral third of inguinal ligament
Internal abdominal oblique insertion
inferior borders of 1-12th ribs

linea alba

pecten pubis via conjoint tendon
Internal abdominal oblique innervation
motor fibers in T7-T12

iliohypogastric nerve

ilioinguinal nerve
Transversus abdominis origin
internal surfaces of 7-12 costal cartilages
thoracolumbar fascia
iliac crest
connective tissue deep to lateral third of inguinal ligament
Transversus abdominis insertion
linea alba with aponeurosis of internal oblique

pubic crest

pecten pubis via conjoint tendon
Transversus abdominis innervation
motor fibers in T7-T12

iliohypogastric nerve

ilioinguinal nerv
Rectus abdominis origin
pubic symphysis and pubic crest
Rectus abdominis insertion
xiphoid process and 5-7 costal cartilages
Rectus abdominis innervation
T7-T11 and subcostal nerve
Rectus abdominis action
flexes trunk

compresses abdominal viscera

stabilizes and controls tilt of pelvis (antilordosis)

(from book)
pyramidalis origin
pubic crest
pyramidalis insertion
linea alba
pyramidalis innervation
subcostal N
psoas major origin
transverse processes of lumbar vertebrae

sides of bodies of T12-L5 vertebrae and intervening vertevral discs
psoas major insertion
by a strong tendon to lesser trochanter of femur
psoas major innervation
L2-L4
psoas major action
flexes the thigh and vertebral column
psoas minor origin
sides of T12-L1 vertebrae and intervertebral discs
psoas minor insertion
pectineal line

iliopectineal eminence via iliopectineal arch
psoas minor innervation
L1
psoas minor action
flexes the vertebral column
quadratus lomborum innervation
T12-L4
quadratus lumborum action
stabilizes the 12th rib, also extends the vertebral column and bends the lumbar spine laterally
iliacus origin
superior two thirds of iliac fossa

ala of sacrum

anterior sacro-iliac ligaments
iliacus insertion
lesser trochanter of femur and shaft inferior to it

psoas major tendon
iliacus action
- flexes the thigh
iliacus innervation
femoral n. (L2-L3)
actions of abdominal muscles (from lecture)
1. Flex the trunk
2. Tense the abdominal wall, increasing intra-abdominal pressure
3. Depress (lowers) the ribs
4. Stabilize the pelvis during walking
coccygeus origin
ischial spine
coccygeus insertion
inferior end of sacrum and coccyx
coccygeus innervation
S4-S5
coccygeus action
support the coccyx and pull it forward after childbirth or defecation
levator ani (puborectalis, pubococcygeus, and iliococcygeus) origin
body of pubis

tendinous arch of obturator fascia

ischial spine
levator ani (puborectalis, pubococcygeus, and iliococcygeus) insertion
perineal body
coccyx
anococcygeal ligament
walls of prostate or vagina
rectum
anal canal
levator ani (puborectalis, pubococcygeus, and iliococcygeus) innervation
(S3-S4) on its pelvic (superior) surface

inferior rectal nerve (S2-S4) on its perineal (inferior) surface
levator ani (puborectalis, pubococcygeus, and iliococcygeus) action
supports the pelvic viscera, resists inferior thrust, and raises the pelvic floor as in forced exhalation, coughing, vomiting, urination, and when lifting heavy objects. In addition, the puborectalis increases the angle between the rectum and anal canal, thereby preventing defecation and maintaining bowel continence
external urethral sphincter action
relaxes to allow urination to occur or when ejaculation of semen occurs
superficial transverse perineal origin
internal sufrace of ischiopubic ramus and ischial tuberosity
superficial transverse perineal insertion
inferior aspect of posterior border of perineal membrane to perineal body
superficial transverse perineal innervation
muscular (deep) branch of perineal nerve, branch of pudendal nerve (S2-S4)

(from book not in notes)
superficial transverse perineal action
supports and fixes perineal body/pelvic floor to support abdominopelvic viscera

resist increased intrabdominal pressure

(from book, not in notes)
ischiocavernosus origin
internal surface of ischiopubic ramus and ischial tuberosity
ischiocavernosus insertion
inferior and medial aspects of crus

perineal membrane medial to crus
ischiocavernosus innervation
muscular (deep) branch of perineal nerve, branch of pudendal nerve (S2-S4)

(from book not in notes)
ischiocavernosus action
maintain an erection by compressing the veins which drain the corpora cavernosa (female and male)
bulbospongiosus origin (male)
median raphe on ventral surface of bulb of penis

perineal body
bulbospongiosus origin (female)
perineal body
bulbospongiosus insertion (male)
perineal membrane

dorsal aspect of corpus spongiosum and corpora cavernosa

fascia of bulb of penis
bulbospongiosus insertion (female)
pubic arch

fascia of corpora cavernosa of clitoris
bulbospongiosus innervation
muscular (deep) branch of perineal nerve, branch of pudendal nerve (S2-S4)

(from book not in notes)
bulbospongiosus action (male)
aids in compressing (emptying) the urethra of urine or semen
bulbospongiosus action (female)
supports and fixes perineal body/pelvic floor
"sphincter" of vagina
assists in erection of clitoris and bulb of vestibule
compresses greater vestibular gland
(from book, not in notes)