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Human Lower Body Muscles
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Muscles of Abdominal Wall
Group III Human:
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Abdominal Wall Muscles
Name of the Muscle Action/s Rectus abdominis Flexes vertebral column, compresses abdomen External oblique abdominis Compresses abdomen, lateral trunk rotation Internal oblique abdominis Transversus abdominis
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Muscles of Abdominal Wall
Group III Muscles of Abdominal Wall External oblique Rectus abdominis Linea alba Internal oblique Transversus abdominis Inguinal ligament
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Pay attention to the direction the muscle fibers run
External oblique O: Ribs I: Iliac crest of ilium and linea alba Internal oblique O: Iliac crest of ilium I: Lower ribs Transversus Abdominis O: Iliac crest of ilium and lower ribs I: Linea alba and pubis
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Serratus anterior Linea alba Rectus abdominus External oblique Internal oblique
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Transversus abdominis
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Six Pack Ab’s
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Muscles of the Gluteal Region
Name of the Muscle Action/s Gluteus maximus Extends and rotates thigh laterally Gluteus medius Abducts and rotates thigh medially Gluteus minimus Tensor fasciae latae
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Muscles of the Gluteal Region
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Tensor Fascia Latae Gluteus Medius Gluteus Maximus
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Gluteus Medius Piriformis Sciatic Nerve
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Gluteus Medius Piriformis Sciatic Nerve
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Psoas major Iliacus
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Extensors (Quadriceps)
Name of the Muscle Action/s Rectus femoris Extend leg, and flex thigh Vastus medialis Extend leg Vastus lateralis Vastus intermedius
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Extensors (Quadriceps)
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Rectus femoris (vastus intermedius is deep to this)
Vastus lateralis Vastus medialis
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Thigh, Deep Anterior view
Group X Thigh, Deep Anterior view Human:
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Group X Thigh, Anterior view Human:
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Flexors (Hamstrings) Name of the Muscle Action/s Gracilis
Flexes leg and adducts thigh Sartorius Flexes leg and thigh, and abducts and rotates thigh Biceps femoris Flexes leg and extends and adducts thigh Semimembranosus Flexes leg and extends and adducts thigh, medially rotates thigh Semitendinosus
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Flexors (Hamstrings)
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Hamstrings: Biceps femoris Semitendinosus Semimembranosus
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Group X Thigh, Posterior view Human:
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Thigh, Deep Posterior view
Group X Thigh, Deep Posterior view Human:
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Posterior thigh Gluteus maximus Adductor magnus Semitendinosus
Biceps femoris Semimembranosus Iliotibial band Gracilis Lateral head of gastrocnemius
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Adductors Name of the Muscle Action/s Adductor longus
Flexes, adducts, and rotates thigh medially Adductor brevis Flexes, adducts, and rotates thigh Adductor magnus
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Adductors
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Pectineus Adductor longus Adductor magnus Sartorius Gracilis
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Thigh, Deep Anterior view
Group X Thigh, Deep Anterior view Human:
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Anteriomedial thigh Femoral artery and vein Pectineus Adductor brevis
Tensor fascia lata Adductor longus Gracilis Iliotibial band Sartorius Vastus lateralis Vastus medialis
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Anteriomedial thigh Iliopsoas Inguinal ligament Tensor fascia lata
Spermatic cord Rectus femoris Pectineus Vastus lateralis Adductor longus Quadriceps tendon Gracilis Patella Vastus medialis Sartorius
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Tensor fascia latae Sartorius
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Group X Thigh, Lateral view Human:
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Muscles that move the foot
Name of the Muscle Action/s Gastrocnemius Planter flexes foot Soleus Peroneus longus Planter flexes and everts Peroneus brevis Peroneus tertius Dorsiflexes and everts Tibialis anterior Dorsiflexes and inverts
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Muscles that move the foot
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Muscles that move the toes
Name of the Muscle Action/s Flexor digitorum longus Flexes the toes Extensor digitorum longus Extends the toes
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Muscles that move the Toes
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Lower Leg, Posterior view
Group XI Lower Leg, Posterior view Human:
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Lower Leg, Deep Posterior view
Group XI Lower Leg, Deep Posterior view Human:
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Gastrocnemius Soleus (deep to Gastrocnemius) Achilles tendon
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Gastrocnemius Soleus
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Tibialis anterior
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Peroneus longus
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Peroneus longus
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Lower Leg, Deep Lateral view
Group XI Lower Leg, Deep Lateral view Human:
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Lower Leg, Deep Lateral view
Group XI Lower Leg, Deep Lateral view Human:
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Lateral compartment of leg
Head of fibula Gastrocnemius Tibialis anterior Soleus Fibularis longus Fibularis brevis Extensor digitorum longus Fibularis tertius
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