Erector spinae muscles
| Erector spinae muscles | |
|---|---|
| File:Erector spinae muscles.png The erector spinae muscles | |
| Details | |
| Origin | Iliac crest, sacrum, lumbar vertebrae, thoracic vertebrae |
| Insertion | Ribs, cervical vertebrae, thoracic vertebrae |
| Artery | Lateral sacral artery |
| Nerve | Posterior branch of spinal nerve |
| Actions | Extends the vertebral column |
| Antagonist | Rectus abdominis muscle |
| Identifiers | |
| Latin | Musculi erector spinae |
| TA98 | Lua error in Module:Wikidata at line 746: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terms of muscle [[[d:Lua error in Module:Wikidata at line 865: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]] | |
The erector spinae muscles (Musculi erector spinae) are a group of muscles that run vertically along the length of the spine and are primarily responsible for extending the vertebral column and maintaining an upright posture. These muscles are located in the back and are part of the intrinsic back muscles.
Anatomy[edit | edit source]
The erector spinae muscles are divided into three main columns:
Each of these columns is further subdivided based on their location along the spine.
Iliocostalis[edit | edit source]
The iliocostalis muscle is the most lateral of the erector spinae muscles. It is divided into three parts:
Longissimus[edit | edit source]
The longissimus muscle is the intermediate column of the erector spinae muscles. It is divided into three parts:
Spinalis[edit | edit source]
The spinalis muscle is the most medial column of the erector spinae muscles. It is divided into three parts:
Function[edit | edit source]
The primary function of the erector spinae muscles is to extend the vertebral column and maintain an erect posture. They also play a role in the lateral flexion of the spine and assist in the rotation of the vertebral column.
Innervation[edit | edit source]
The erector spinae muscles are innervated by the posterior branch of spinal nerves, which provide the necessary motor signals for muscle contraction.
Blood Supply[edit | edit source]
The blood supply to the erector spinae muscles is primarily provided by the lateral sacral artery.
Clinical Significance[edit | edit source]
The erector spinae muscles are often involved in back pain and muscle strains due to their role in maintaining posture and supporting the spine. Strengthening and stretching exercises targeting these muscles can help alleviate discomfort and prevent injury.
See Also[edit | edit source]
References[edit | edit source]
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Contributors: Prab R. Tumpati, MD
