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Erector Spinae (Left)
Muscular System

Erector Spinae (Left)

Erector spinae

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Description

The erector spinae (sacrospinalis) muscles are the collective name for a group of muscles found in the intermediate layer of the intrinsic muscles of the back. Overall, the erector spinae muscles are involved in movements of the head, neck and trunk.

The erector spinae muscle consists of three individual, vertically oriented, muscles that lie parallel to the vertebral column. From medial to lateral, these muscles are the:

- spinalis;

- longissimus;

- iliocostalis.

This group of muscles is known as the “erector spinae” because they are responsible for straightening the vertebral column.

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Erector Spinae Muscle

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The erector spinae muscles continue to control the forward fall of the trunk and the oblique muscles are responsible for rotation of the trunk.

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