muscles of the human body! - mrs. taylorlwcmrstaylor.yolasite.com/resources/chapter 10 -...
TRANSCRIPT
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Muscles of the Human Body!
Muscles that Move the Elbow, Wrist, Hand & Fingers
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Triceps Brachii Prime mover of forearm extension
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Biceps Brachii Prime mover of elbow flexion. Supinates
forearm (at same time); (lifts Radius)
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Brachialis
Prime mover of elbow flexion. (lifts Ulna)
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Brachioradialis
Synergist in elbow flexion
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Pronator Teres
Pronates forearm
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Flexor Carpi Radialis
Prime mover of wrist flexion; abducts wrist
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Palmaris Longus
Weak wrist flexor; tenses skin and fascia of palm during hand movements
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Flexor Carpi Ulnaris
Prime mover of wrist flexion; adducts wrist
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Extensor Digitorum
Prime mover of wrist extension and does extend fingers.
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Extensor Carpi Ulnaris
Extends wrist; also adducts wrist
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Supinator
Supinates forearm
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Extensor Digit Minimi
• Extends the pinky finger
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Iliopsoas (Iliacus and Psoas Major)
Prime mover of thigh flexion or flexing trunk on thigh during a bow
Iliacus
Psoas Major
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Sartorius • Flexes, abducts, and laterally
rotates thigh; flexes knee (weak) as in a soccer kick
• Known as “tailor’s muscle” because it helps effect cross-legged position in which tailors are often depicted
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Adductors (Brevis, Longus, Magnus)
• Adducts thigh, medially rotates thigh and thigh flexor; (groin muscles)
• Used in movements that press thighs together
• Ex. Sitting on a horse
Adductor Longus
Adductor Magnus
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Pectineus
Adducts, flexes, and medially rotates thigh
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Gracilis
Adducts thigh, flexes and medially rotates thigh, especially during walking; flexes knee.
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Quadriceps Femoris (Rectus Femoris & Vastus Muscles)
• Prime mover of knee extension – used in climbing, jumping, running, and rising from a seated position. Plays an important role in strengthening the knee joint
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Gluteus Maximus
Prime mover in thigh extension. role in abduction and lateral rotation.
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Gluteus Medius
Prime mover of abduction. Medially rotates thigh – extremely important in walking
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Hamstrings (Biceps Femoris, Semitendinosus,
Semimembranosus)
Prime movers of thigh extension if knee is extended, prime mover of knee flexion if hip is extended flexes knee
Semimembranosus
Semitendinosus
Biceps Femoris
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Tibialis Anterior
• Prime mover of dorsiflextion; inverts foot.
• Assists in supporting medial longitudinal arch of foot
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Extensor Digitorum Longus
Prime mover of toe extension. Synergist of dorsiflexion
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Fibularis (Peroneus) Longus
• Plantar flexes and everts foot;
• may help keep foot flat on ground
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Gastrocnemius
Prime mover of plantar flexion of foot when knee is extended.
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Soleus
• Prime mover of plantar flexion of foot.
• Important locomotor and postural muscle during walking, running, and dancing
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Plantaris
• Assists in knee flexion and plantar flexion of foot