2022年8月2日 · The spinalis, longissimus and iliocostalis muscles form the erector spinae group of the deep back muscles. Together they form a broad powerful muscle group responsible for major movement of the spine.

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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.

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2023年1月7日 · The spinalis is a deep muscle of the back. It is the smallest of the muscle columns within the erector spinae complex, and can be divided into the three parts – thoracic, cervicis and capitis (although the cervicis part is absent in some individuals).

2024年10月14日 · What Is the Spinalis. The spinalis is the most medially located muscle in the erector spinae group, which forms the intermediate layer of the deep intrinsic back muscles. The other two muscles in this group are the longissimus and Iliocostalis.

Spinalis works synergistically with the other members of the erector spinae group. Erector spinae muscle group have 3 major functions. Unilateral contraction of erector spinae results in lateral flexion (ipsilateral) and rotation of the cervical, thoracic spine and lumbar spines.

2023年11月3日 · The spinalis muscles are innervated by the lateral branches of the posterior rami of the cervical, thoracic and lumbar spinal nerves. The blood supply to the spinalis muscles comes from the vertebral, deep cervical, occipital, intercostal and lumbar arteries.

Spinalis connects the spinous process of the adjacent vertebrae. Longissimus forms the middle part of the erector spinae muscles, lateral to the spinalis. The longissimus muscle forms the main meat of the erector group. It attaches along the transverse process of the vertebrae.

2025年1月27日 · The erector spinae muscles are a group of three long, powerful muscles that run longitudinally along the back, forming the primary extensor muscles of the spine. This group consists of the iliocostalis, longissimus, and spinalis muscles, which are further divided into regional components based on their attachments.