Erector Spinae Locations

The Erector Spinae group consists of: Iliocostalis, Longissimus and Spinalis.

Origin:

Broad tendon from iliac crest, posterior surface of sacrum, sacro-iliac ligaments
Insertion:

Illiocostalis: superiorly to angles of lower ribs to transverse processes of cervical vertebrae
Longissimus: superiorly to ribs between tubercles and transverse processes in thoracic and cervical regions and to mastoid process
Spinalis : superiorly to spinous processess in upper thoracic region to cranium

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