Erector Spinae Muscles
Get Erector Spinae Muscles essential facts below. View Videos or join the Erector Spinae Muscles discussion. Add Erector Spinae Muscles to your topic list for future reference or share this resource on social media.
Erector Spinae Muscles
Erector spinae
Gray389 - Erector spinae.png
The erector spinae muscle group
Origin Spinous processes of T9-T12 thoracic vertebrae, medial slope of the dorsal segment of illiac crest
Insertion spinous processes of T1 and T2 thoracic vertebrae and the cervical vertebrae
Artery lateral sacral artery
Nerve posterior branch of spinal nerve
Actions extends the vertebral column
Antagonist rectus abdominis muscle
Latin Musculus erector spinae
TA A04.3.02.002
FMA 71302
Anatomical terms of muscle

The erector spinae ( i-REK-t?r SPY-nee)[1] or spinal erectors is a set of muscles that straighten and rotate the back.


The erector spinae is not just one muscle, but a bundle of muscles and tendons which run more or less vertically and are paired left to right. These muscles lie in the groove to the side of the vertebral column and extend throughout the lumbar, thoracic, and cervical regions. The erector spinae is covered in the lumbar and thoracic regions by the thoracolumbar fascia, and in the cervical region by the nuchal ligament.

This large muscular and tendinous mass varies in size and structure at different parts of the vertebral column. In the sacral region, it is narrow and pointed, and at its origin chiefly tendinous in structure. In the lumbar region, it is larger, and forms a thick fleshy mass. Further up, it is subdivided into three columns. They gradually diminish in size as they ascend to be inserted into the vertebrae and ribs.

The erector spinae arises from the anterior surface of a broad and thick tendon. It is attached to the medial crest of the sacrum, to the spinous processes of the lumbar and the eleventh and twelfth thoracic vertebrae and the supraspinous ligament, to the back part of the inner lip of the iliac crests, and to the lateral crests of the sacrum, where it blends with the sacrotuberous and posterior sacroiliac ligaments.

Some of its fibers are continuous with the fibers of origin of the gluteus maximus.

The muscular fibers form a large fleshy mass that splits, in the upper lumbar region, into three columns, viz., a lateral (iliocostalis), an intermediate (longissimus), and a medial (spinalis). Each of these consists of three parts, inferior to superior, as follows:


The iliocostalis originates from the sacrum, erector spinae aponeurosis, and iliac crest. The iliocostalis has three different insertions according to the parts:


The longissimus muscle is the intermediate and the largest of the three columns. It has three parts with different origin and insertion:

  • longissimus thoracis originates from the sacrum, spinous processes of the lumbar vertebrae, and transverse process of the last thoracic vertebra and inserts in the transverse processes of the lumbar vertebrae, erector spinae aponeurosis, ribs, and costal processes of the thoracic vertebrae.
  • longissimus cervicis originates from the transverse processes of T6-T1 and inserts in the transverse processes of C7-C2.
  • longissimus capitis originates from the transverse processes of T3-T1, runs through C7-C3, and inserts in the mastoid process of the temporal bone.


The spinalis muscle is the smallest and most medial column. It has three parts:

  • spinalis thoracis which originates from the spinous process of L3-T10 and inserts in the spinous process of T8-T2.
  • spinalis cervicis originates from the spinous process of T2-C6 and inserts in the spinous process of C4-C2.
  • spinalis capitis is an inconstant muscle fiber that runs from the cervical and upper thoracic and then inserts in the external occipital protuberance.
Insertion Lateral Column
Intermediate Column
Medial Column
Lower thoracic vertebrae and ribs I. lumborum
Upper thoracic vertebrae and ribs I. thoracis L. thoracis S. thoracis
Cervical vertebrae I. cervicis L. cervicis S. cervicis
Skull L. capitis S. capitis

From lateral to medial, the erector spinae muscles can be remembered using the mnemonic, I Love Spine. I lliocostalis, Love Longissimus and Spine Spinalis.[2]


Examples of exercises by which the erector spinae can be strengthened for therapeutic or athletic purposes include, but are not limited to:

Additional images


This article incorporates text in the public domain from page 397 of the 20th edition of Gray's Anatomy (1918)

  1. ^ "How to pronounce spinae in English". Cambridge University Press 2015. Retrieved 2015. 
  2. ^ "Medical mnemonic". LifeHugger. Archived from the original on 2011-07-13. Retrieved . 

External links

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



Top US Cities was developed using's knowledge management platform. It allows users to manage learning and research. Visit defaultLogic's other partner sites below: : Music Genres | Musicians | Musical Instruments | Music Industry
NCR Works : Retail Banking | Restaurant Industry | Retail Industry | Hospitality Industry