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Serratus Anterior
Origin:
outer surfaces and superior borders of upper 8-9 ribs
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Serratus Anterior
Insertion:
costal surface of medial border of scapula
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Serratus Anterior
Action:
scapular protraction (abduction); scapular upward rotation when used with traps
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Serratus Anterior
Innervation:
Long thoracic N
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Upper trap
Origin:
external occipital protuberance, 1/3 of superior nuchal line, spinous process of C7
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Upper Trap
Insertion:
Lateral 1/3 clavicle and acromion process
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Upper Trap
Action:
upward rotation of scapula, elevation of scapula
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Upper Trap
Innervation:
spinal accessory
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Middle trap
Origin:
spinous processes of T1-5
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Middle trap
Insertion:
spine of scapula (superior lip)
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Middle trap
Action:
adduction (retraction) of scapula
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Middle trap
Innervation:
spinal accessory
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Lower trap
Origin:
spinous processes of T6-12
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Lower trap
Insertion:
apex of spine of scapula
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Lower trap
Action:
depression of scapula; w/ serratus anterior- upward rotation of scapula
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Lower Trap
Innervation:
spinal accessory
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Levator Scapulae
Origin:
transverse processes of C1-4
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Levator Scapulae
Insertion:
medial border of scapula between superior angle and root of spine
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Levator Scapulae
Action:
adduction, elevation and downward (medial) rotation of scapula
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Levator scapulae
Innervation
dorsal scapular
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Rhomboid Major
Origin:
spinous processes of T2-5
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Rhomboid Minor
Origin:
spinous processes C7 and T1
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Rhomboid Major
Insertion:
medial border of scapula between spine and inferior angle
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Rhomboid Minor
Insertion:
root of spine of scapula
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Rhomboids
Action:
adduction, elevation, and downward (medial) rotation of scapula
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Rhomboids
Innervation:
dorsal scapular
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Pectoralis minor
Origin:
ribs near cartilages
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Pectoralis minor
Insertion:
coracoid process of scapula
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Pectoralis minor
Action:
scapular depression and tilts scapula anteriorly (tipping)
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Pectoralis minor
Innervation:
medial and lateral pectoral
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