LABS 3&4 muscles of the thorax Flashcards by Taylor Smith

Q

latissimus dorsi origin

A

lilac crest, t7-t12, lumbar fascia

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Q

latissimus dorsi insertion

A

intertubular groove of humerus

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Q

latissimus dorsi action

A

extend, medially rotate, adduct arm

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Q

trapezius origin

A

ligamentum nuchae, c7-t12

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Q

trapezius insertion

A

clavicle, spine of scapula

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Q

trapezius action

A

elevate, adduct, rotate, depress scapula

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Q

levator scapula origin

A

c1-c4

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Q

levator scapula insertion

A

medial border of scapula

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Q

levator scapula action

A

elevate scapula

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Q

rhomboideus major origin

A

t2-t5

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Q

rhomboideus major insertion

A

medial border of scapula

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Q

rhomboideus major action

A

adduct, elevate, rotate scapula

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Q

rhomboideus minor origin

A

c7-t1

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Q

rhomboideus minor insertion

A

medial border of scapula

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Q

rhomboideus minor action

A

adduct, elevate, rotate scapula

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Q

teres major origin

A

inferior angle of scapula

Q

teres major insertion

A

intertubercular groove of humerus

Q

teres major action

A

medially rotate, extend arm

Q

pectoralis major origin

A

sternum, clavicle, ribs 2-6

Q

pectoralis major insertion

A

intertubercular groove of humerus

Q

pectoralis major action

A

adduct, flex, medially rotate arm

Q

pectoralis minor origin

A

ribs 3-5

Q

pectoralis minor insertion

A

coracoid process of scapula

Q

pectoralis minor action

A

depress, rotate scapula

subscapularis origin

supraspinous fossa of scapula

subscapularis insertion

greater tubercle of humerus

subscapularis action

abduction of arm

infraspinatus origin

infraspinous fossa of scapula

infraspinatus insertion

greater tubercle of humerus

infraspinatus action

lateral rotation of arm

supraspinatous origin

subscapular fossa of scapula

supraspinatous insertion

lesser tubercle of humerus

supraspinatous action

medial rotation of arm

teres minor origin

lateral border of scapula

teres minor insertion

greater tubercle of humerus

teres minor action

lateral rotation of arm

deltoid origin

lateral clavicle, spine and acromion of scapula

deltoid insertion

deltoid tuberosity of humerus

deltoid action

abduct, flex, extend, medially and laterally rotate arm