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Muscle actions
Muscles for A&P 1 Cp 10
81
Anatomy
Undergraduate 2
11/09/2009

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Cards

Term
Temporalis
Definition
Elevates madible
Term
Masseter
Definition
Elevation of mandible
Term
Medial Pterygoid
Definition
Elevation of Mandible
Term
Lateral Pterygoid
Definition
Depression of mandible
Term
Digastric
Definition
Depresses mandible when hyoid is fixed
Term
Mylohyoid
Definition
Spans madible from side to side
Term
Stylohyiod
Definition
elevates and retracts mandible
Term
Omohyoid
Definition
Depresses hyoid after being elevated
Term
Sternohyoid
Definition
Depresses hyoid after being elevated
Term
Diaphragm
Definition
Prime mover of inspiration
Term
External intercostals
Definition
Elevate and  protract 2-12 ribs
Term
Internal intercostals
Definition
In inspiration, aids elevating ribs and expanding thoracic cavity
Term
External abdominal obliques
Definition
Maintains posture
Term
Internal Abdominal Oblique
Definition
Maintains Posture
Term
Orbicularis Oculi
Definition
closes eye in blinking
Term
Obicularis oris
Definition
Closes lips, protrudes lips
Term
Levator labii superioris
Definition
elevates and everts upper lip
Term
Levator anguli oris
Definition
Elevates angle in mouth
Term
Zygomaticus major
Definition
draws angle of mouth up and laterally
Term
Zygomaticus Minor
Definition
Elevates upper lip
Term
Depressor anguli oris
Definition
draws angle of mouth down and laterally
Term
Depressor labii inferioris
Definition
draws lower lip down and lateral
Term
Buccinator
Definition
compresses cheeck against teeth and gums
Term
Platysma
Definition
Draws lower lip and angle of mouth down
Term
Sternocleidomastoid
Definition
Rotating the head left or right
Term
Trapezius
Definition
Extends and laterally flexes head
Term
Splenius capitus
Definition
Extends head
Term
Semispinalis Capitis
Definition
Extends head
Term
Transversus Abdominal
Definition
Compresses abdominal content
Term
Rectus abdominis
Definition
Forward bending at waist
Term

Erector Spinae

Ilicostalis

Longissimus

Spinalis

Definition
Extension and flexion of vetebral column
Term
Quadratus lumborum
Definition
Bilateral Contraction extends lumbar vetebral column
Term
Ischiocavernosus
Definition
Maintains erection
Term
Deep transverse perineal
Definition
compresses urethrae muscle
Term
Bulbospongiosus
Definition
Aids in erection
Term
External urethae sphincter
Definition
Retains urine in baldder
Term
Pectoralis minor
Definition
rotates scapule and depresses apex of shoulder
Term
Serratus Anterior
Definition
Protracts Scapula
Term
Rhomboidus
Definition
Retracts scapula and braces shoulder
Term
Pectoralis major
Definition
Adducts humerus
Term
Latissimus Dorsi
Definition
Adducts and medially rotates humerus
Term
Deltoid
Definition
Flex and medially rotates arm
Term
Teres Major
Definition
Extends and medially rotates humerus
Term
Coracobrachialis
Definition
Flexes and medially rotates arm
Term

Rotator Cuff

Supraspinatus

Infraspinatus

Teres minor

Subscapularis

Definition
Stabalizes shoulder
Term
Brachialis
Definition
Elbow flexion
Term
Biceps Brachii
Definition
Elbow flexion
Term
Tricep brachii
Definition
Extends elbow
Term
Brachioradialis
Definition
Flexes elbow
Term
Pronator quadratus
Definition
Pronates forearm
Term
Pronator teres
Definition
Pronates forearm
Term
Supinator
Definition
Supinates forearm
Term
Flexor carpi Radialis
Definition
Flexes wrist
Term
Flexor carpi ulnaris
Definition
Flexes wrist
Term
Flexor digitorum Superficialis
Definition
Flexes wrist
Term
Palmaris Longus
Definition
Anchors skinand fascia of palmar region
Term
Flexor digitorum Profundus
Definition
Flexes wrist
Term
Extensor carpi radialis longus
Definition
Extends wrist
Term
Extensor carpi radialis brevis
Definition
Extends wrist
Term
Extensor digitorum
Definition
Extends wrist
Term
Extensor carpi ulnaris
Definition
Extends wrist
Term

Iliopsoas

Iliacus

Psoas Major

Definition
Flexes thigh at hip
Term
Tensor Fascia Latae
Definition
Extends knee
Term
Gluteus maximus
Definition
Abducts thigh
Term
Gluteus medius
Definition
Abducts thigh
Term
Adductor brevis, longus, & magnus
Definition
Adducts thigh
Term
Gracilis
Definition
Adducts thigh
Term
Pectineus
Definition
Adducts thigh
Term

Rectus femoris

Vastus lateralis, medialis,& intermedius

Definition
Extends knee
Term
Sartorius
Definition
Abducts thigh
Term
Biceps Femoris
Definition
Flexes knee
Term
Semitendinosus
Definition
Flexes knee
Term
Semimembranosus
Definition
flexes knee
Term
Fibularis Tertius
Definition
everts foot
Term
Extenor digitorum longus
Definition
Extends toes
Term
Tibialis Anterior
Definition
inverts foot
Term
Gastrocnemius
Definition
Plantar flexes foot
Term
Soleus
Definition
plantar flexes foot
Term
Flexor digitorum longus
Definition
Flexes phalanges 2-5
Term
Tibialis Posterior
Definition
Inverts foot
Term
Fibularis Brevis
Definition
everts foot
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