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21 Cards in this Set
- Front
- Back
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superficial extrinsic back muscle |
trapezius, levator scapulae, rhomboids, latissimus dorsi |
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intermediate extrinsic back muscle |
serratus posterior superior and inferior |
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superficial intrinsic back muscle |
splenius capitis and cervicis fiber run obliquely in cervical and upper thoracic region |
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intermediate intrinsic back muscle |
erector spinae(iliocoastalis, longissimus, spinalis) fiber run longitudinally from pelvis to skull |
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deep intrinsic back muscle |
transversospinalis(semispinalis, multifidis, rotatores) fiber run obliquely from transverse process to spinous process |
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trapezius |
accessory nerve cn11 c3,4 spinal nerves elevate, depress, retract scapula rotate glenoid cavity superiorly |
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levator scapulae |
c3,4 c4,5(dorsal scapula) elevate and downward rotate scapula |
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rhomboids minor and major |
c4,5 dorsal scapula depress and downward rotate scapula |
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latissimus dorsi |
c6,7,8 extend, adduct, medially rotate humerus |
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triangle of auscultation |
thinnest area of masculature in back. good area to listen to heart and lung sounds bn 6,7 rib |
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serratus posterior superior |
t2-5 elevate rib and proprioception |
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serratus posterior inferior |
t9-12 depress rib and proprioception |
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thoracolumbar fascia |
cover deep muscle of back and trunk it is critical to organization and integrity of region |
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splenius cervicis and capitis |
posterior/dorsal rami of spinal nerve act on one side-laterally flex neck and rotate head to side of active muscle act bilaterally-extend head and neck |
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erector spinae |
posterior rami of spinal nerve act bilaterally-extend vertebral column and head; as back is flexed, they control movement via eccentric contraction act unilaterally-laterally flex vertebral column |
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transversospinalis |
posterior rami of spinal nerve |
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semispanalis |
capitis, cervicis, thoracis extend head and upper vertebral column and rotate them contralaterally |
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multifidus |
stabilize vertebrae during movements of vertebral column |
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rotatores |
cervicis, thoracis, lumborum stabilize vertebrae and assist with extension and rotation; proprioception |
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minor deep back muscle assist larger muscle group |
posterior rami of spinal nerve interspinalies aid in extension and rotation of vertebral column intertransversarii aid in lateral flexion and stabilization (few innervated by anterior rami) levatores costarum assist respiration and lateral flexion |
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surface feature of back |
to locate muscle group for testing peripheral nerve to determine regions of the vertebral column to estimate approximate position of inferior end of spinal cord |
