Muscles of the Lower Body
Move the Thigh and Legs
The muscles of the lower body include those of the glu-
teal region, thigh, and leg. These muscles are larger and
more powerful than those of the upper limbs. They pro-
vide stability, locomotion, and maintenance of posture.
Figure 6.23 lists their origins, insertions, and actions.
Gluteal muscles move the thigh and include the gluteus
maximus, gluteus medius, and piriformis. Thigh muscles
can be divided into five groups, based on their functions:
M uscles o f th e g lu teal region th a t m ove th e thig h
• Figure 6.23
%'V
Quadratus lumborum
Iliacus-
Tensor fasciae latae
Sartorius
Quadriceps femoris:
Rectus femoris (cut)
Vastus lateralis
Vastus intermedius
Vastus medialis
Psoas major
Pectineus
Adductor longus
Gracilis
Adductor magnus
Anterior superficial view
Gracilis
Adductor
magnus
Hamstrings:
Semitendinosus
Biceps femoris
Semimembranosus
Sartorius
Gluteus medius
Gluteus maximus
Tensor fasciae
latae
Vastus lateralis
Gastrocnemius
Gluteus
medius (cut)
Gluteus
maximus (cut)
Piriformis
Gluteus maximus
(cut)
Posterior deep view
Posterior superficial view
182 CHAPTER 6
The Muscular System
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