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33 terms

Leg Muscle Functions

STUDY
PLAY
Rectus Femoris
Extends Leg at Knee Joint
Sartorius
Flexes, Abducts, and Laterally Rotates Thigh at Hip Joint; Flexes Leg at Knee Joint
Vastus Lateralis
Extends Leg at Knee Joint (lateral side of thigh)
Vastus Medialis
Extends Leg at Knee Joint (medial side of thigh)
Vastus Intermedius
Extends Leg at Knee Joint
Gracilis
Adducts Thigh (Flexes Leg and helps rotate it Medially)
Tensor Fascia Latae
Abducts, Medially Rotates, and Flexes Thigh; Steadies Trunk on Thigh
Pectineus
Adducts and Flexes Thigh; assists with medial rotation of thigh
Tibialis Anterior
Dorsiflexes Ankle and Inverts Foot
Gastrocnemius
Plantarflexes Ankle, Raises Heel during Walking
Soleus
Plantarflexes Ankle and Steadies Leg on Foot (underneath Gastrocnemius - shaped like sole fish)
Adductor Longus
Adducts and Flexes the Thigh, and helps to Laterally Rotates the Hip Joint
Iliopsoas
Flex Thigh at Hip Joint and Stablilize thie joint
Semimembranosus
Extend Thigh; Flex Leg and Rotate it Medially (when thigh and leg are flexed, they can Extend Trunk)
Semitendinosus
Extend Thigh; Flex leg and Rotate it Medially (when thigh and leg are flexed, they can Extend Trunk)
Biceps Femoris
Flexes leg and Rotates it Laterally; extend thigh (e.g., when starting to walk)
Gluteus Medius
Abduct and Medially Rotate Thigh (Steady Pelvis on Leg when opposite leg is raised)
Gluteus Minimus
Abduct and Medially Rotate Thigh; Steady Pelvis on leg when opposite leg is raised
Gluteus Maximus
Extends Thigh and Assists in its Lateral Rotation(steadies thigh and assists in raising trunk from flexed position - i.e. getting up from sitting position)
Adductor Brevis
Adducts Thigh
Adductor Magnus
Adducts Thight (its adductor part also flexes thigh, and its hamstring part extends it)
(Obturator Internus)
Laterally Rotate Extended Thigh and Abduct flexed thigh; steady femoral head in acetabulum
(Piriformis)
Laterally Rotates and Stabilizes Hip
(Inferior Gemellus)
Laterally Rotate extended thigh and Abduct flexed thigh (same as Obturator Internus)
(Superior Gemellus)
Laterally Rotate extended thigh and Abduct flexed thigh (same as Obturator Internus and Inferior Gemellus)
Peroneus Brevis
Evert Foot and Weakly Plantarflex Ankle
Peroneus Longus
Evert Foot and wekaly Plantarflex Ankle (same as Peroneus Longus)
Peroneus Tertius
Dorsiflexes Ankle and Aids in Eversion of Foot
Extensor Digitorum Longus
Extends Lateral Four Digits and Dorsiflexes Ankle
Flexor Digitorum Longus
FLEXES Lateral Four Digits and Plantarflexes Ankle (supports longitudinal arches of foot)
Extensor Hallucis Longus
Extends Great Toe and Dorsiflexes Ankle
Flexor Hallucis Longus
Flexes Great Toe at All Joints and Plantarflexes Ankle (supports medial longitudinal arch of foot)
Tibialis Posterior
Plantarflexes Ankle and Inverts Foot

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