327
CHAPTER NINE
Muscular System
Gracilis m.
Semimembranosus m.
Semitendinosus m.
Sartorius m.
Vastus medialis m.
Rectus femoris m.
Adipose tissue
Skin
Adductor magnus m.
Adductor longus m.
Great saphenous v.
Femoral v. and a.
Vastus intermedius m.
Shaft of femur
Sciatic n.
Short head of
biceps femoris m.
Long head of
biceps femoris m.
Vastus lateralis m.
Lateral
Medial
Anterior
Plane
of
section
TABLE
9.12
|
Muscles That Move The Thigh
Muscle
Origin
Insertion
Action
Nerve Supply
Psoas major
Lumbar intervertebral discs; bodies and
transverse processes of lumbar vertebrae
Lesser trochanter of femur
Flexes thigh
Branches of L1-3
nerves
Iliacus
Iliac fossa of ilium
Lesser trochanter of femur
Flexes thigh
Femoral n.
Gluteus maximus
Sacrum, coccyx, and posterior surface
of ilium
Posterior surface of femur
and fascia of thigh
Extends hip
Inferior gluteal n.
Gluteus medius
Lateral surface of ilium
Greater trochanter of femur
Abducts and rotates thigh medially
Superior gluteal n.
Gluteus minimus
Lateral surface of ilium
Greater trochanter of femur
Same as gluteus medius
Superior gluteal n.
Piriformis
Anterior surface of sacrum
Greater trochanter of femur
Abducts and rotates thigh laterally
L5, S1, and S2 nerves
Tensor fasciae latae
Anterior iliac crest
Iliotibial tract
(fascia of thigh)
Abducts, ±
exes, and rotates
thigh medially
Superior gluteal n.
Pectineus
Spine of pubis
Femur distal to lesser
trochanter
Flexes and adducts thigh
Obturator and femoral
nerves
Adductor brevis
Pubic bone
Posterior surface of femur
Adducts, ±
exes, and rotates
thigh laterally
Obturator n.
Adductor longus
Pubic bone near symphysis pubis
Posterior surface of femur
Adducts, ±
exes, and rotates
thigh laterally
Obturator n.
Adductor magnus
Ischial tuberosity
Posterior surface of femur
Adducts thigh, posterior portion extends
and anterior portion ±
exes thigh
Obturator and branch
of sciatic nerves
Gracilis
Lower edge of symphysis pubis
Medial surface of tibia
Adducts thigh and ±
exes knee
Obturator n.
FIGURE 9.40
A cross section of the thigh (superior view). (
a.
stands for artery,
m.
stands for muscle,
n.
stands for nerve, and
v.
stands for vein.)
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