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The flashcards below were created by user
julianne.elizabeth
on FreezingBlue Flashcards.
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Orbicularis Oris
Origin: various facial muscles
Insertion: Lips
Action: Close Lips
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Orbicularis Oculi
Origin: nasal portion of frontal bone
Insertion: Eyelids
Action: Blinking
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Temporalis
Origin: Temporal Fossa
Insertion: Coronoid Process of mandible
Action: Elevates Jaw
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Masseter
Origin: Zygomatic Arch
Insertion: Angle and ramus of mandible
Action: clenches teeth
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Sternocleidmastoid
Origin: manubrium
Insertion: Mastoid Process of the Temporal Bone
Action: Rotation of head
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Sternohyoid
Origin: manubrium
Insertion: Hyoid
Action: pulls down hyoid bone
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Digastric
Origin: mastoid process
Insertion: fibrous loop on hyoid bone
Action: raises hyoid
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Trapezius
Origin: occipital bone
Insertion: spine of scapula
Action: hyperextends head
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Levator Scapulae
Origin: 1 to 4 cervical vertebrae
Insertion: Superior angle of scapula
Action: extends head backwards and flexes laterally
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Splenius Group
Origin: 1st three thoracic vertebrae
Insertion: occipital bone
Action: extension and rotation of head
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Pectoralis Major
Origin: Clavicle
Insertion: between greater and lesser tuberacles of humerus
Action: flexion of humerus
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Pectoralis Minor
Origin: Ribs 3,4,5
Insertion: Coranoid process of the scapula
Action: Depresses shoulder by drawing the scapula downward
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Deltoid (anterior, middle, posterior)
Origin: acrominon process
Insertion: deltoid tiberosity of humerus
Action: whole muscle abducts humerus
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Serratus Anterior
Origin:1st to 9th ribs
Insertion: anterior medial border of scapula
Action: Pulls scapula downward, forward, and inward
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External Intercostals (11 Pairs)
Origin: inferior borders of ribs
Insertion: superior border of ribs
Action: elevates ribs (aids in inspirtation)
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Internal Intercostals (11 pairs)
Origin: superior border of ribs
Insertion: inferior borders of ribs
Action: deprsses ribs (aids in expiration)
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Diaphram
Origin: inferior border of the ribs and sternum
Insertion: central tendon
action: inspiration
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Latissimus Dorsi
Origin: lower 6 thoracic vertbrae
Insertion: greater tuberacle of the humerus
Action: extends humerous
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Infraspinatus
Origin: infraspinous fossa of scapula
Insertion: greater tuberacle of humerus
Action: rotates humerus laterally
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Teres Major
Origin: Inferior angle of scapula
Insertion: Crest of the lesser tuberacle of the humerus
Action: rotates humerus medially
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Teres Minor
Origin: lateral border of scapula
Insertion: lowest portion of the greater tuberacle of humerus
Action: rotates humerus laterally
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Supraspinatus
Origin: supraspinous fossa
Insertion: greater tuberacle of the humerus
Action: abduction of the humerus
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Subscapularis
Origin: subscapular fossa
Insertion: lesser tubercle of the humerus
Action: holds head of humerus in glenoid cavity
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Rhomboideus Major
Origin: spinous process of 1st to 5th thoracic vertebrae
Insertion: medial border of the scapula
Action: Adducts scapula
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Rhomboideus Minor
Origin: ligamentum nuchae
Insertion: upper part of the medial border of scapula
Action: adducts scapula
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