Muscles of the Hip, Knee, and Lower Leg Flashcards
Concentric Contractions
involved muscle developing tension as it shortens; against gravity
Eccentric Contractions
involve the muscle lengthening under tension; slow with gravity
Isometric contraction
tension is developed within muscle but joint angles remain constant; static contractions
Agonist Muscles
primary or prime movers, or muscles most involved
Antagonist muscles
located on opposite side of joint from agonist; work in cooperation with agonist muscles by relaxing & allowing movement; when contracting concentrically perform the opposite joint motion of agonist
Gastrocnemius muscle
plantar flexion of ankle, flexion of knee

Soleus Muscle
plantar flexion of ankle

Peroneus Longus Muscle
Eversion of foot, plantar flexion of ankle

Peroneus Brevis
eversion of foot, plantar flexion of ankle

Peroneus Tertius
Eversion of foot, Dorsiflexion of ankle

Extensor Digitorum Longus
Extension of four lesser toes, dorsiflexion of ankle, eversion of foot

Extensor Hallucis Longus
Dorsiflexion of ankle, extension of great toe, weak inversion of foot

Tibialis Anterior
*shin splint muscles* Dorsiflexion of anke, inversion of foot

Tibialis Posterior
Plantar flexion of ankle, Inversion of foot

Flexor Digitorum Longus
Flexion of 4 lesser toes, inversion of foot, plantar flexion of ankle
Flexor Hallucis Longus
Flexion of great toe, Inversion of foot, Plantar flexion of ankle

Agonists of Ankle Dorsiflexion
Tibialis anterior, Extensor digitorum longus, peroneus tertius, extensor hallucis longus
Agonists of Ankle Plantarflexion
Gastrocnemius, Soleus, Flexor Digitorum Longus, Flexor Hallucis Longus, Peroneous Longus, Peroneus Brevis, Plantaris, Tibialis Posterior
Agonists of Transverse Tarsal and Subtalar Inversion
Tibialis Anterior, Tibialis Posterior, Flexor DIgitorum Longus, Flexor Hallucis Longus
Agonists of Transverse Tarsal and Subtalar Eversion
Peroneus longus, Peroneus brevis, Peroneus tertius, extensor digitorum longus
Agonists of Toe Flexion
Flexor Hallucis longus, flexor digitorum longus
Agonists of Toe Extension
Extensor hallucis longus, extensor digitorum longus
Rectus Femoris
flexion of hip, extension of knee, anterior pelvic rotation *Quad

Vastus Lateralis
Extension of knee *Quad

Vastus Intermedius
Extension of knee *Quad

Vastus Medialis
Extension of knee *Quad

Semitendinosus
Flexion of knee, extnesion of hip, internal rotation of hip, internal rotation of flexed knee, posterior pelvic rotation *hamstring

Semimembranosus
flexion of knee, Extension of hip, internal rotation of hip, intrernal rotation of flexed knee, posterior pelvic rotation *hamstring

Biceps Femoris
Flexion of knee, extension of hip, external rotation of hip, external rotation of flexed knee, posterior pelvic rotation *hamstring

Popliteus
Flexion of knee, Internal rotation of flexed knee

Agonists of knee Extension
rectus femoris, vastus lateralis, vastus intermedius, vastus medialis
Agonists of knee flexion
Biceps femoris, semitendinosus, semimembranosus
Agonists of Knee internal rotation
semitendinosus, semimembranosus, popliteus
Agonists of knee external rotation
Biceps femoris
Iliopsoas
Hip flexion, hip abduction

Sartorius
hip flexion, hip abduction, hip external rotation

Gluteus maximus
Hip extension, Hip external rotation
Gluteus Medius and Minimus
Hip adduction, hip internal rotation
Tensor Fasciae Latae
Hip abduction, Hip flexion, Hip internal rotation

Adductor longus
hip adduction, hip flexion

adductor brevis
hip adduction, hip flexion

adductor magnus
hip adduction, hip extension

Pectineus
Hip adduction, hip flexion

Gracilis
Hip adduction, hip flexion

Agonists of Hip flexion
Iliopsoas, Rectus femoris, Sartorius
Agonists of Hip Extension
Gluteus maximus, biceps femoris, semitendinosus, semimembranosus
Agonists of Hip Abduction
Gluteus medius, gluteus minimus, tensor fasciae latae
agonists of hip adduction
adductor longus, adductor brevis, adductor magnus, pectineus, gracilis