Spine Anatomy
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| What is the origin for the trapezius | external occipital protuberance, middle 1/3rd superior nuchal line, nuchal line, sp c7-t12
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| What is the insertion for the trapezius | lateral 1/3rd of the clavicle, spine of scapula, acromion process
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| What is the innervation for trapezius muscle | Spinal accessory nerve CN 11 ventral rami c3-c4
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| What is the origin for the latissimus dorsi? | T6-L5, iliac crest, ribs 8-12, sacrum, thoracolumbar fascia
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| What is the insertion for the latissimus dorsi | Intertubercular groove of humerus
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| What is the action of the trapezius | scapular elevation, scapular retraction, scapular depression, ipsilateral lateral flexion, head and neck extension
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| What is the innervation of the latissimus dorsi | thoracodorsal nerve c6-c8
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| What is the action of the latissimus dorsi | internal rotation, adduction, extension
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| what is the origin for the levator scapulae | posterior tubercles TP c1-c4
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| what is the insertion for the levitator scapulae | superior angle of the scapula
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| what is the innervation for the levator scapulae | dorsal scapular c5 ventral rami c3-c4
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| what is the action of the levator scapulae | elevation, downward rotation, ipsilateral lateral flexion of neck
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| rhomboid minor- origin | c7-t1
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| rhomboid minor- insertion | medial border of the scapula at the scapular spine
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| rhomboid minor innervation | dorsal scapular c5
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| rhomboid minor action | elevation, retraction, downward rotation, helps fix scapular to thoracic cage
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| rhomboid major origin | t2-t5
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| rhomboid major insertion | medial border of the scapula at the scapular spine
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| what kind of muscles are the rhomboids and levator scapulae | intermediate extrinsic 2
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| serratus posterior superior muscle origin | ligamentum nuchae, sp c7-t3
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| serratus posterior superior muscle insertion | upper borders of ribs 2-5
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| innervation of serratus posterior superior muscle | 1-4 intercostal nerve ventral rami t1-t4
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| action of serratus posterior superior muscle | elevates 2-5th rib
deep inspriration
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| what kind of muscles are the serratus posterior superior and serratus posterior inferior | deep extrinsic 3
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| serratus posterior inferior muscle origin | t11-l3
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| serratus posterior inferior muslce insertion | ribs 9-12
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| innervation of serratus posterior inferior muscle | 9-12 intercostal nerve ventral rami t9-t12
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| action of serratus posterior inferior muscle | deep expiration depresses the lower four ribs
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| what are layers 1-3 innervated by | ventral rami
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| splenius capitis muscles origin | ligamentum nuchae c7-t3
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| splenius capitis muscles insertion | mastoid process nuchal line lateral 3rd
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| innervation of splenius capitis | dorsal rami c1-t1
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| action of spelenius capitis | b/l contraction causes head extension
u/l contraction causes ipsilateral rotation and ipsilateral lateral flexion
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| spelnius cervicis muscles origin | t3-t6
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| splenius cervicis muscle insertion | tp c1-c3
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| spelenius cervicis muscle innervation | dorsal rami in area
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| action of splenius cervicis | b/l contraction causes neck extension
u/l contraction causes ipsilateral rotation and ipsilater lateral flexion
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| both splenius muscles are what | superficial intrinsic 4
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