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Flashcards in Muscles of Lower Half Deck (25)
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1

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.

2

sartorius

LONGEST M IN THE BODY
O = ASIS to medial tibia
N = femoral n. (L23)
A = femoral a.

3

rectus femoris

O = AIIS and superior groove to patella
N = femoral n.
A = lat. femoral circumflex a.

4

vastus lateralus

O = greater trochanter to patella
N = femoral n.
A = lat. fem. circ. and superior genicular aa.

5

vastus medialis

O = intertrochanteric line and linea aspera to patella
N = femoral n
A = femoral and profunda femoral a.

6

vastus intermedius

O = anterolateral femur to patella
N = femoral n.
A = lat. fem. circ. a.

7

adductor longus

MOST ANTERIOR
O = body of pubis to linea aspera
N = Obturator n
A = med. fem. circ. a.

8

pectineus

O = pecten pubis to pectineal line of femur
N = femoral n (L23)
A = med. fem. circ. a.

9

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.

10

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.

11

gracilis

O = ramus of pubis to media tibia
N = obturator n.
A = profunda femoris, obturator aa.

12

what spinal level is obturator n?

L2,3,4

13

what spinal level is femoral n.?

L2,3,4

14

obturator externus

O = obturator foramen and membrane to trochanteric fossa of femur
N = obturator n. (L34)
A = obturator and med. fem. circ. aa.

15

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.

16

internal anal sphincter

O = upper 2/3 of anus
N = Sy tonus, PSy inhibits contraction
A = inferior rectal a.

17

diaphragm origins

xiphoid, lower 6 costal cartilages, ant. long. ligament, transverse processes of L1-2, bodies of L 1-3, rib 12

18

diaphragm n.

motor = phrenic n.
sensory = phrenic, intercostal nn.
pain = referred to C4 dermatome

19

diaphragm a

superior = pericardiacophrenic a, musculophrenic a, sup. phrenic a.,
inferior = inferior phrenic a (from abdominal aorta)

20

psoas major

O = transferse processes, bodies, discs of T12-L5 courses deep to inguinal lig. to lesser trochanter
N = lumbar plexus

21

psoas minor attachments

T12-L1 body to iliopubic eminience of hip bone

22

iliacus

O = upper iliac fossa, courses lateral to psoas to lesser trochanter
N = femoral n.

23

Quadratus lumborum

O = iliolumbar lig, iliac crest, transverse processes to rib 12
N = lumbar plexus

24

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.

25

piriformis

O = ant. surface of sacrum and sacrotubrous lig to superior part of greater trochanter
N = ventral rami S1-2
A = superior gluteal, inferior gluteal, internal pudendal