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Muscles of the Lower body
Origins, Insertions, Actions and Innervations
21
Anatomy
Undergraduate 3
07/01/2012

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Term
TENSOR FASCIA LATAE
Definition
- Iliac crest, ASIS
- Iliotibial tract
- Flexes, abducts and medially rotates thigh
- Superior gluteal nerve
Term
GLUTEUS MAXIMUS
Definition
- Iliac crest, saccrum, coccyx, lumbrodorsal fascia
- Iliotibial tract & Gluteal tuberosity
- Extends and laterally rotates thigh
- Inferior Gluteal Nerve
Term
GLUTEUS MEDIUS
Definition
- Anterior iliac crest, lateral surface of ilium
- Greater trochanter of femur
- Abducts and medially rotates thigh
- Superior gluteal nerve
Term
GLUTEUS MINIMUS
Definition
- Lateral surface of ilium
- Greater trochanter of femur
- Abducts and medially rotates thigh
- Superior gluteal nerve
Term
GASTROCNEMIUS
Definition
- Femoral condyles
- Calcaneus (via calcaneal tendon)
- Flexes knee; plantar flexes, inverts and adducts foot
- Tibial nerve
Term
SOLEUS
Definition
- Proximal and head of fibula; soleal line of tibia
- Calcaneus (via calcaneal tendon)
- Plantar flexes, inverts, adducts foot
- Sciatic nerve, tibial branch
Term
PLANTARIS
Definition
- Lateral supracondylar rim of femur
- Posterior calcaneus
- Flexes knee, plantar flexes foot
- Tibial nerve
Term
TIBIALIS ANTERIOR
Definition
- LATERAL CONDYLE AND PROXIMAL SHAFT OF TIBIA
- Base of metatarsal 1 and cuneiform 2
- Dorsi-flexes and inverts foot
- Deep peroneal nerve
Term
TIBIALIS POSTERIOR
Definition
- PROXIMAL TIBIA AND FIBULA; INTEROSSEUS MEMBRANE
- TARSALS AND METATARSALS 2-4
- PLANTAR FLEXES, INVERTS AND ADDUCTS FOOT
- SCIATIC NERVE AND TIBIAL BRANCH
(like soleus)
Term
PERONEUS BREVIS
Definition
- Midlateral margin of fibula
- Base of metatarsal 5
- Plantar flexes and everts foot
- Superficial peroneal nerve
Term
PERONEUS LONGUS
Definition
- HEAD AND PROXIMAL FIBULA; LATERAL CONDYLE OF TIBIA
- BASE OF METATARSAL 1 AND CUNEIFORM 2
- PLANTAR FLEXES AND EVERTS FOOT
- SUPERFICIAL PERONEAL NERVE
**Supports longitudinal arch
Term
PERONEUS TERTIUS
Definition
- ANTERIOR DISTAL FIBULA
- Base of metatarsal 5
- Dorsiflexes and everts foot
- Deep peroneal nerve
Term
RECTUS FEMORIS
Definition
- Superior Acetabular Rim; Anterior inferior iliac spine
- Tibial tuberosity
- Flexes thigh, extends knee
- Femoral nerve
Term
VASTUS INTERMEDIUS
Definition
- Linea aspera and anterolateral FEMUR
- Tibial tuberosity
- Extends knee
- Femoral nerve
Term
VASTUS MEDIALIS
Definition
- Linea Aspera
- Tibial tuberosity
- Extends knee
- Femoral nerve
Term
VASTUS LATERALIS
Definition
- Linea aspera; anterolateral femur
- Tibial tuberosity
- Extends knee
- Femoral nerve
Term
SEMIMEMBRANOSUS
Definition
- Ischial tuberosity
- Posterior, medial condyle of tibia
- Flexes knee; extends and medially rotates thigh
- Sciatic nerve
Term
SEMITENDINOSUS
Definition
- Ischial tuberosity
- Proximal medial tibia
- Flexes knee; extends and medially rotates thigh
- Sciatic nerve
Term
BICEPS FEMORIS
Definition
- Linea aspera and ischial tuberosity
- Head of fibula; Lateral condyle of tibia
- Extends and laterally rotates thigh; flexes knee
- Sciatic nerve; peroneal branch
Term
SARTORIUS
Definition
- ANTERIOR SUPERIOR ILIAC SPINE
- Medial tibia
- FLEXES AND LATERALLY ROTATES THIGH; FLEXES KNEE
- Femoral nerve
Term
POPLITEUS
Definition
- Lateral condyle of FEMUR
- POSTERIOR PROXIMAL SHAFT OF TIBIA
- Medially rotate tibia (laterally rotates thigh)
- Tibial nerve
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