Intermediate Intrinsic Back Muscles

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Last updated 8:32 PM on 4/16/26
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8 Terms

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Muscle groups of erector spinae

Iliocostalis, longissimus, spinalis

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Erector spinae prox attach (origin)

Iliac crest, post sacrum, sacral/inf lumbar spinous processes, SI ligs, supraspinous lig

3
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Iliocostalis distal attach (insertion)

Angles of ribs, cerv trans processes

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Longissimus distal attach (insertion)

Ribs betw tubercles/angles, trans processes in cerv/thor regions, mastoid

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Spinalis distal attach (insertion)

Spinous processes upper thoracic, cranium

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Erector spinae unilateral action

Lat flex vert column

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Erector spinae bilateral action

Extend vert column/head

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Erector spinae innervation

Post rami spinal nerves