Muscles of Lower Half Flashcards
tensor fascia lata
O = ASIS, lip of iliac crest to IT tract (lat. condyles of tibia) N = sup. gluteal n. (L45); A = superior gluteal a.
sartorius
LONGEST M IN THE BODY
O = ASIS to medial tibia
N = femoral n. (L23)
A = femoral a.
rectus femoris
O = AIIS and superior groove to patella N = femoral n. A = lat. femoral circumflex a.
vastus lateralus
O = greater trochanter to patella N = femoral n. A = lat. fem. circ. and superior genicular aa.
vastus medialis
O = intertrochanteric line and linea aspera to patella N = femoral n A = femoral and profunda femoral a.
vastus intermedius
O = anterolateral femur to patella N = femoral n. A = lat. fem. circ. a.
adductor longus
MOST ANTERIOR
O = body of pubis to linea aspera
N = Obturator n
A = med. fem. circ. a.
pectineus
O = pecten pubis to pectineal line of femur N = femoral n (L23) A = med. fem. circ. a.
adductor brevis
DEEP TO PECTINEUS AND ADDUCTOR LONGUS
O = ramus of pubis to pectineal line and linea aspera
N = obturator n
A = med. fem. circ. a.
adductor magnus
O1 = ischiopubic ramus and ischial tuberosity to gluteal tuberosity O2 = linea aspera to adductor tubercle of femur (ham part) N1 = Oburator n. N2 = tibial part of sciatic n. A = med. fem. circ., profunda femoris, popliteal aa.
gracilis
O = ramus of pubis to media tibia N = obturator n. A = profunda femoris, obturator aa.
what spinal level is obturator n?
L2,3,4
what spinal level is femoral n.?
L2,3,4
obturator externus
O = obturator foramen and membrane to trochanteric fossa of femur N = obturator n. (L34) A = obturator and med. fem. circ. aa.
external anal sphincter
O = subQ is to corrugator ani; superfic is to coccyx and anococcygeal lig; deep is to perineal body and blends to puborectalis N = inferior rectal nn (somatic) A = inferior rectal a.
internal anal sphincter
O = upper 2/3 of anus N = Sy tonus, PSy inhibits contraction A = inferior rectal a.
diaphragm origins
xiphoid, lower 6 costal cartilages, ant. long. ligament, transverse processes of L1-2, bodies of L 1-3, rib 12
diaphragm n.
motor = phrenic n. sensory = phrenic, intercostal nn. pain = referred to C4 dermatome
diaphragm a
superior = pericardiacophrenic a, musculophrenic a, sup. phrenic a., inferior = inferior phrenic a (from abdominal aorta)
psoas major
O = transferse processes, bodies, discs of T12-L5 courses deep to inguinal lig. to lesser trochanter N = lumbar plexus
psoas minor attachments
T12-L1 body to iliopubic eminience of hip bone
iliacus
O = upper iliac fossa, courses lateral to psoas to lesser trochanter N = femoral n.
Quadratus lumborum
O = iliolumbar lig, iliac crest, transverse processes to rib 12 N = lumbar plexus
obturator internus
O = pelvic surface of obturator membrane and obturator foramen to the medial surface of greater trochanter N = n. to obturator internus (L5-S1) A = muscular branch of internal pudendal, inf. gluteal aa.
