Spinalis
Spinalis
Spinalis (/spaɪˈneɪlɪs/), from the Latin spina meaning "spine", is a portion of the Erector spinae muscles that specifically concentrates near the spine. It is one of the smallest yet significant muscles that make up the complex muscular system of the spine.
Etymology
The term Spinalis is derived from the Latin word spina, which translates to "spine". This is indicative of the muscle's location along the vertebral column.
Anatomy
The Spinalis muscle is part of the larger Erector spinae muscle group, which is a group of muscles and tendons running more or less vertically throughout the lumbar, thoracic, and cervical regions of the vertebral column. The Spinalis itself is further divided into three parts: Spinalis dorsi, Spinalis cervicis, and Spinalis capitis.
Spinalis Dorsi
The Spinalis Dorsi is the segment of the Spinalis muscle which is located in the thoracic region of the spine. It is the most substantial and well-defined part of the Spinalis muscle.
Spinalis Cervicis
The Spinalis Cervicis is the cervical segment of the Spinalis muscle. It is often indistinct and blended with the Semispinalis cervicis muscle.
Spinalis Capitis
The Spinalis Capitis is the segment of the Spinalis muscle which is located in the head region. It is often considered as part of the Semispinalis capitis muscle.
Function
The primary function of the Spinalis muscle is to maintain posture and control movements of the spine. It helps in the extension and lateral flexion of the vertebral column and head.
Related Terms
- Erector spinae
- Spinalis dorsi
- Spinalis cervicis
- Spinalis capitis
- Semispinalis cervicis
- Semispinalis capitis
External links
- Medical encyclopedia article on Spinalis
- Wikipedia's article - Spinalis
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