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Hip,Thigh,Leg,&Foot
Muscle,Origin, Insertion, and Action
| Muscle | Origin | Insertion | Action |
|---|---|---|---|
| Iliopsoas | Origin Iliac Fossa Lumbar Vertebrae | Insertion Femur (lesser trochanter) | Flexion of hip. Assists in abduction & lateral rotation of thigh |
| Gluteus Maximus | Origin Ilium Sacrum Coccyx | Insertion Femur (greater trochanter & ITB) | Forceful extention of hip. Lateral rotation of extended hip. |
| Gluteus Medius | Origin Ilium | Insertion Femur | Abducts and rotates thigh medially |
| Gluteus Minimus | Origin Ilium | Insertion Femur | Abducts & rotates thigh medially; stabilizes pelvis on femur |
| Tensor Fasciae Latae | Origin Ilium | Insertion Tibia | Assists abduction of thigh & braces knee in walking |
| Quadratus Lumborum | Origin Iliac Crest | Insertion Lumbar Vertebrae | Raises hip or lateral flexion of trunk |
| Piriformis | Origin Anterior Sacrum | Insertion Femur | Rotates thigh outward. Abducts & extends thigh |
| Adductor Brevis | Origin Pubic Bone | Insertion Femur | Adducts thigh |
| Adductor Longus | Origin Pubic Bone | Insertion Femur | Adducts thigh |
| Adductor Magnus | Origin Pubic Bone | Insertion Femur | Adducts thigh |
| Muscle Gracilis | Origin Pubic Bone | Insertion Tibia | Adducts thigh; assists flexion & medial rotation of flexed knee |
| Sartorius | Origin Ilium | Insertion Tibia | Weakly flexes thigh & leg; adducts leg. Rotates thigh laterally & leg medially. Assists in crossing of the leg. |
| Rectus Femoris | Origin Ilium Acetabulum of Femur | Insertion Tibia | Action Flexes thigh; extends leg at knee |
| Vastus Lateralis | Origin Femur | Insertion Tibia | Extends leg at knee |
| Vastus Medialis | Origin Femur | Insertion Tibia | Extends leg at knee |
| Vastus Intermedius | Origin Femur | Insertion Tibia | Extends leg at knee |
| Biceps Femoris | Origin Ischial Tuberosity, Femur | Insertion Fibula | Flexes & Rotates leg laterally and extends thigh |
| Semitendinosus | Origin Ischial Tuberosity | Insertion Tibia | Flexes & rotates leg medially and extends thigh |
| Semimembranosus | Origin Ischial Tuberosity | Insertion Tibia | Flexes & rotates leg medially and extends thigh |
| Gastrocnemius | Origin Femur | Insertion Calcaneus | Extends foot (plantar flexion), or flexes lower leg |
| Soleus | Origin Tibia Fibula | Insertion Calcaneus | Extends foot (strongest plantar flexor of the ankle) |
| Tibialis Anterior | Origin Tibia | Insertion Tarsal Metatarsal | Dorsiflexion of ankle; inversion of foot. Contributes to forming the arch of foot |
| Tibialis posterior | Origin Tibia Fibula | Insertion Tarsal Metatarsal | Plantar flexion of ankle; inversion of foot. Contributes to forming the arch of foot |
| Popliteus | Origin Femur | Insertion Tibia | Initiates "unlocking" of extended knee by medial rotation of tibia |