Erector spinae muscles: Difference between revisions
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[[ | [[File:Gray236.png|thumb]] [[File:Gray388.png|thumb]] [[File:Gray803.png|thumb]] [[File:Gray1126.png|thumb]] {{Short description|Muscles that straighten and rotate the back}} | ||
{{Infobox muscle | {{Infobox muscle | ||
| Name = Erector spinae muscles | | Name = Erector spinae muscles | ||
| Latin = Musculi erector spinae | | Latin = Musculi erector spinae | ||
| Origin = Spinous processes of T9-T12 thoracic vertebrae, medial slope of the dorsal segment of the iliac crest | |||
| Insertion = Spinous processes of T1 and T2 thoracic vertebrae and the cervical vertebrae | |||
| Origin = | | Blood = Lateral sacral artery | ||
| Insertion = | | Nerve = Posterior branch of spinal nerve | ||
| Blood = | | Action = Extends the vertebral column | ||
| Nerve = | |||
| Action = Extends the | |||
}} | }} | ||
The '''erector spinae muscles''' | The '''erector spinae muscles''' are a group of muscles and tendons that run more or less vertically on each side of the vertebral column. They are primarily responsible for extending the spine and are crucial for maintaining posture and the curvature of the spine. | ||
==Anatomy== | ==Anatomy== | ||
The erector spinae muscles are divided into three | The erector spinae muscles are divided into three columns: | ||
* '''Iliocostalis''': The most lateral column, it is subdivided into iliocostalis lumborum, iliocostalis thoracis, and iliocostalis cervicis. | |||
* '''Longissimus''': The intermediate column, it is subdivided into longissimus thoracis, longissimus cervicis, and longissimus capitis. | |||
* '''Spinalis''': The most medial column, it is subdivided into spinalis thoracis, spinalis cervicis, and spinalis capitis. | |||
Each of these columns is further divided into regional components based on their location along the spine. | |||
==Function== | ==Function== | ||
The primary function of the erector spinae muscles is to extend the | The primary function of the erector spinae muscles is to extend the vertebral column. They also play a role in lateral flexion and rotation of the spine. These muscles are essential for maintaining an upright posture and are active during activities such as lifting, bending, and twisting. | ||
==Innervation== | ==Innervation== | ||
The erector spinae muscles are innervated by the | The erector spinae muscles are innervated by the posterior branches of the spinal nerves. This innervation allows for the precise control of spinal movements and posture. | ||
==Blood Supply== | ==Blood Supply== | ||
The blood supply to the erector spinae muscles is primarily provided by the | The blood supply to the erector spinae muscles is primarily provided by the lateral sacral artery, with contributions from other segmental arteries along the spine. | ||
==Clinical Significance== | ==Clinical Significance== | ||
The erector spinae muscles | The erector spinae muscles can be involved in various clinical conditions, such as back pain and muscle strain. Strengthening and stretching exercises targeting these muscles are often recommended for the prevention and management of back pain. | ||
== | ==Also see== | ||
* [[Vertebral column]] | * [[Vertebral column]] | ||
* [[ | * [[Muscle]] | ||
* [[ | * [[Spinal cord]] | ||
* [[Back pain]] | |||
* [[Posture]] | |||
{{Muscles of the torso}} | |||
[[Category:Muscles of the torso]] | [[Category:Muscles of the torso]] | ||
[[Category:Muscles of the back]] | [[Category:Muscles of the back]] | ||
Latest revision as of 15:49, 9 December 2024
Muscles that straighten and rotate the back
The erector spinae muscles are a group of muscles and tendons that run more or less vertically on each side of the vertebral column. They are primarily responsible for extending the spine and are crucial for maintaining posture and the curvature of the spine.
Anatomy[edit]
The erector spinae muscles are divided into three columns:
- Iliocostalis: The most lateral column, it is subdivided into iliocostalis lumborum, iliocostalis thoracis, and iliocostalis cervicis.
- Longissimus: The intermediate column, it is subdivided into longissimus thoracis, longissimus cervicis, and longissimus capitis.
- Spinalis: The most medial column, it is subdivided into spinalis thoracis, spinalis cervicis, and spinalis capitis.
Each of these columns is further divided into regional components based on their location along the spine.
Function[edit]
The primary function of the erector spinae muscles is to extend the vertebral column. They also play a role in lateral flexion and rotation of the spine. These muscles are essential for maintaining an upright posture and are active during activities such as lifting, bending, and twisting.
Innervation[edit]
The erector spinae muscles are innervated by the posterior branches of the spinal nerves. This innervation allows for the precise control of spinal movements and posture.
Blood Supply[edit]
The blood supply to the erector spinae muscles is primarily provided by the lateral sacral artery, with contributions from other segmental arteries along the spine.
Clinical Significance[edit]
The erector spinae muscles can be involved in various clinical conditions, such as back pain and muscle strain. Strengthening and stretching exercises targeting these muscles are often recommended for the prevention and management of back pain.
