What is the erector spinae group?
The erector spinae group is the intermediate layer of the intrinsic muscles of the back. This group is made of three subgroups, with the group divisions occurring by location. iliocostalis subgroup is the most lateral. longissimus subgroup is between iliocostalis and spinalis. spinalis subgroup is the most medial.
What muscles are part of the Transversospinalis group?
Transversospinales muscle group is a deep group of back muscles that lies deep to the Erector Spinae. It consists of 3 major subgroups: semispinalis, multifidus and rotatores.
Which muscles make up the erector spinae group?
The term lumbar extensor is used colloquially to refer to the erector spinae muscle group, which is comprised of the iliocostalis lumborum, longissimus thoracis, and spinalis thoracis.
Where is the spinalis thoracis located?
The spinalis thoracis muscle is part of the erector spinae muscle group located adjacent to the spine. This muscle is attached to the segments of the thoracic spine, which is adjacent to the shoulder blades.
What are the 3 spinalis muscles?
Spinalis is the most medial of the three erector spinae muscles. Like the other two, it is made up of three parts. Spinalis and longissimus both have capitis, cervicis and thoracis parts, while iliocostalis has cervicis, thoracis and lumborum parts.
What are the 3 erector spinae muscles?
The erector spinae are divided into three groups, from medial to lateral:
- Spinalis muscles.
- Longissimus muscles.
- Iliocostalis muscles.
What is the spinalis Thoracis?
Medical Definition of spinalis thoracis : an upward continuation of the sacrospinalis that is situated medially to and blends with the longissimus thoracis, arises from the spinous processes of the first two lumbar and last two thoracic vertebrae, and inserts into the spinous processes of the upper thoracic vertebrae.
Which of the Transversospinalis muscles rotate the spine?
| Transversospinales | |
|---|---|
| Origin | transverse process |
| Insertion | spinous process |
| Nerve | Posterior ramus of spinal nerve |
| Actions | Extend vertebral column (bilateral contraction); rotate vertebral column (unilateral contraction) Antagonist = |
What is the primary action of the longissimus spinalis and iliocostalis muscles?
Erector spinae muscles
| Definition | Three groups of deep muscles located on either side of the vertebral column |
|---|---|
| Function | Bilateral contraction – extension of spine Unilateral contraction – lateral flexion of spine (ipsilateral) |
| Mnemonic | I Like Standing (stands for Iliocostalis, Longissimus & Spinalis) |
What is spinalis?
The spinalis is a portion of the erector spinae, a bundle of muscles and tendons, located nearest to the spine. It is divided into three parts: Spinalis dorsi, spinalis cervicis, and spinalis capitis.
Is there a Spinalis capitis?
Spinalis Capitis (or Spinalis Colli) belongs to the medial column of the erector spinae (Sacrospinalis) group of muscles. It is known as spinalis capitis due to its attachments to the head (cranium).
What is the spinalis?
The spinalis is a portion of the erector spinae, a bundle of muscles and tendons, located nearest to the spine.
What are the different types of spinal muscles?
These nine muscles are divided into three different groups: iliocostalis, longissimus, and spinalis. The erector spinae muscles are often called spinal erectors.
What muscles are included in the paraspinal muscle group?
Other muscles included in the paraspinal muscle group include the rotatores and the multifidi. The erector spinae muscles include three main muscles which themselves can also be divided into sections. The erector spinae muscles include: iliocostalis, longissimus, and spinalis. Each of these muscles can be divided into three sections.
What are the three parts of the sacrospinalis?
It is divided into three parts: Spinalis dorsi, spinalis cervicis, and spinalis capitis. Spinalis dorsi, the medial continuation of the sacrospinalis, is scarcely separable as a distinct muscle.