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22 Cards in this Set
- Front
- Back
EXTRINSIC SUPERFICIAL BACK LAYER
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EXTRINSIC SUPERFICIAL BACK LAYER
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TRAPEZIUS
O & I |
ORIGIN
1) Superior Nuchal Line 2) External Occipital Protuberance 3) Nuchal Ligament 4) Spinous Processes C7-T12 INSERTION 1) Lateral one-third of clavicle 2) Acromion 3) Spine of Scapula |
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TRAPEZIUS
Nerve (Innervations) |
1) Motor - Accessory Nerve CN XI (spinal root)
2) Proprioception - C3 & C4 |
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TRAPEZIUS
Vasculature |
transverse cervical artery
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TRAPEZIUS
Main Action |
1) Superior fibers: Elevate scapula
2) Middle Fibers: ADduct (retracts) scapula 3) Inferior Fibers: Depress scapula 4) Superior and Inferior fibers: synergistically smoothly rotates scapula and maintain glenoid fossa relative to head of humerus. |
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LATISSIMUS DORSI
O & I |
ORIGINS
1) Spinous processes of T6 - to L5 vertebrae 2) Thoracolumbar fascia 3) Sacrum 4) Iliac Crest 5) Ribs 10-12 INSERTION Floor of the intertubercular groove (sulcus) of the humerus |
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LATISSIMUS DORSI
Nerve (Innervations) |
Thoracodorsal nerve (C6-C8)
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LATISSIMUS DORSI
Vasculature |
Thoracodorsal Artery
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LATISSIMUS DORSI
Main Action |
1) Extends the humerus
2) ADucts the humerus 3) Medially rotates humerus 4) Raises body toward arms when climbing |
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LEVATOR SCAPULAE
O & I |
ORIGIN
Posterior Tubercles of TP of C1 to C4 INSERTION superior medial angle of scapula |
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LEVATOR SCAPULAE
Nerve (Innervation) |
Dorsal Scapular Nerve C3 - C4
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LEVATOR SCAPULAE
Vasculature |
transverse cervical arteries
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LEVATOR SCAPULAE
Main Action |
Elevates and rotates glenoid cavity inferiorly by rotating scapula
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RHOMBOID MAJOR
O & I |
ORIGIN
Spinous processes of T2 to T5 INSERTION Medial border of scapula from spine to inferior angle |
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RHOMBOID MAJOR
Nerve (Innervations) |
Dorsal Scapular Nerve (C4, C5)
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RHOMBOID MAJOR
Main Action |
1) Fix scapula to thoracic wall for smooth efficient movement
2) Retracts (ADducts) scapula 3) elevates scapula |
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RHOMBOID MAJOR
Vasculature |
dorsal scapular
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RHOMBOID MINOR
O & I |
ORIGIN
1) Lower portion of the nuchal ligament 2) Spinous process of C7-T1 INSERTION Medial border of the scapula at the spine |
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RHOMBOID MINOR
NERVE (Innervations) |
Dorsal Scapular Nerve (C4-C5)
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RHOMBOID MINOR
Vasculature |
dorsal scapular
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RHOMBOID MINOR
Main Action |
1) Retracts (ADducts)
2) Elevate Scapula 3) Rotates the scapula (glenoid fossa) inferiorly |
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Name the Muscles of the Extrinsic - Superficial Back Layer.
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Trapezius
Latissimus Dorsi Levator Scapulae Rhomboid Major Rhomboid Minor |