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9.7: MODELS- Arm and Leg

  • Page ID
    59411
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    Name

    Action

    Origin

    Insertion

    Forearm movers

    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

    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

    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

    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

    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

    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


    This page titled 9.7: MODELS- Arm and Leg is shared under a CC BY-SA license and was authored, remixed, and/or curated by Laird C. Sheldahl.

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