9.7: MODELS- Arm and Leg
|
Name |
Action |
Origin |
Insertion |
|
|
Forearm movers |
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|
Biceps brachii |
Flexes arm at elbow |
Scapula |
Radius |
|
|
Brachialis |
Flexes arm at elbow |
Humerus |
Ulna |
|
|
Triceps brachii |
Extends arm at elbow |
Humerus & Scapula |
Ulna |
|
|
Pronator teres |
Pronates forearm |
Humerus & Ulna |
Radius |
|
|
Supinator |
Supinates forearm |
Humerus & Ulna |
Radius |
|
|
Brachioradialis |
Flexes arm at elbow ( beer raising) |
Humerus |
Radius |
|
|
Hand & finger movers |
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|
Name |
Action |
Origin |
Insertion |
|
|
Flexor carpi radialis |
Flexes & abducts hand at wrist |
Humerus |
Carpal Bones |
|
|
Palmaris longus |
Flexes hand at wrist |
Humerus |
Carpal Bones |
|
|
Flexor carpi ulnaris |
Flexes & adducts hand at wrist |
Humerus |
Carpal Bones |
|
|
Extensor carpi radialis |
Extends & abducts hand at wrist |
Humerus |
Carpal Bones |
|
|
Extensor digitorum |
Extends fingers |
Humerus |
Digits |
|
|
Extensor carpi ulnaris |
Extends & adducts hand at wrist |
Humerus |
Carpal Bones |
|
|
Muscles of the thigh & leg |
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|
Name |
Action |
Origin |
Insertion |
|
|
Flexor digitorum longus |
Flexes toes |
Tibia |
Digits |
|
|
Flexor hallucis longus |
Flexes hallux |
Fibula |
big toe |
|
|
Tibialis anterior |
Dorsiflex foot at ankle, inverts foot |
Tibia |
1st metatarsal |
|
|
Extensor digitorum longus |
Extends toes |
Tibia & fibula |
digits |
|
|
Fibularis (peroneus) longus |
plantarflexes |
Tibia & fibula |
1st metatarsal |
|
|
Gastrocnemius |
plantarflexes |
Femur |
calcaneous |
|
|
Soleus |
Plantarflexes |
Femur & tibia |
calcaneous |
|
Name |
Action |
Origin |
Insertion |
|
|
Muscles of the leg & thigh |
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|
Psoas major |
Flexes thigh at hip (also flexes vertebral column) |
Thoracic and Lumbar Vertebrae |
Femur |
|
|
Iliacus |
Flexes thigh at hip |
Ilium |
Femur |
|
|
Adductor longus |
Adducts thigh at hip |
Pubis |
Femur |
|
|
Adductor magnus |
Adducts thigh at hip |
Pubis and Ischium |
Femur |
|
|
Gracilis |
Adducts thigh at hip |
Pubis |
Tibia |
|
|
Gluteus maximus |
Extends thigh at hip, rotates thigh laterally |
Ilium, Sacrum and Coccyx |
Femur, ITB |
|
|
Gluteus medius |
Abducts thigh at hip, rotates thigh medially |
Ilium |
Femur |
|
|
Sartorius |
Flexes leg at knee (also flexes + rotates thigh at hip) |
Ilium |
Tibia |
|
|
Tensor fascia latae |
tenses the ITB, supports knee |
Ilium |
ITB |
|
|
Iliotibial band (IT band/tract) |
Not a muscle |
n/a |
n/a |
|
Quadriceps femoris |
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|
Name |
Action |
Origin |
Insertion |
|
|
Rectus femoris |
Extends leg at knee (also flexes thigh at hip) |
Ilium |
Tibia |
|
|
Vastus lateralis |
Extends leg at knee |
Femur |
Tibia |
|
|
Vastus medialis |
Extends leg at knee |
Femur |
Tibia |
|
|
Vastus intermedius |
Extends leg at knee |
Femur |
Tibia |
|
Hamstrings |
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|
Name |
Action |
Origin |
Insertion |
|
|
Biceps femoris |
Flexes leg at knee (also extends thigh at hip) |
Ischium & Femur |
Tibia & Fibula |
|
|
Semitendinosus |
Flexes leg at knee (also extends thigh at hip) |
Ischium |
Tibia |
|
|
Semimembranosus |
Flexes leg at knee (also extends thigh at hip) |
Ischium |
Tibia |