Spinalis origin and insertion

The spinalis muscle is situated in the middle and upper back as well as the neck, running parallel to the spine. It plays an important role in extending spinalis origin and insertion back and neck, while also aiding in lateral flexion movements.

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. 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. Once you've finished editing, click 'Submit for Review', and your changes will be reviewed by our team before publishing on the site. We use cookies to improve your experience on our site and to show you relevant advertising. To find out more, read our privacy policy.

Spinalis origin and insertion

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. Spinalis dorsi, the medial continuation of the sacrospinalis , is scarcely separable as a distinct muscle. It is situated at the medial side of the longissimus dorsi , and is intimately blended with it; it arises by three or four tendons from the spinous processes of the first two lumbar and the last two thoracic vertebrae : these, uniting, form a small muscle which is inserted by separate tendons into the spinous processes of the upper thoracic vertebrae, the number varying from four to eight. It is intimately united with the semispinalis dorsi , situated beneath it. Spinalis cervicis, or spinalis colli, is an inconstant muscle, which arises from the lower part of the nuchal ligament , the spinous process of the seventh cervical, and sometimes from the spinous processes of the first and second thoracic vertebrae , and is inserted into the spinous process of the axis , and occasionally into the spinous processes of the two cervical vertebrae below it. Spinalis capitis biventer cervicis is usually inseparably connected with the semispinalis capitis. Spinalis capitis is not well characterized in modern anatomy textbooks and atlases, and is often omitted from anatomical illustration. However, it can be identified as fibers that extend from the spinous processes of TV1 and CV7 to the cranium, often blending with semispinalis capitis [ citation needed ]. This article incorporates text in the public domain from page of the 20th edition of Gray's Anatomy Contents move to sidebar hide.

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The spinalis muscle is the most medial of the erector spinae group of muscles, and is lateral to the multifidus group. The spinalis detaches from medial side of the longissimus thoracis and travels forward near thoracic vertebral spinous processes to cervical vertebral spinous processes. It may be divided into two parts:. In the pig and the horse, the spinalis muscle forms a common muscle belly, therefore sometimes termed as "spinalis thoracic et cervicis thoracic and cervical spinal muscle ", whereas in ruminants and carnivores, the thoracic and cervical spinalis muscles receive additional muscular strands from the the mamillary and transverse processes of some vertebrae, and the fibers of the spinlais musccles are closely related to and often difficult to separate form the semispinalis muscle. Therefore, some authors use the compound name "thoracic and cervical spinal and semispinal muscle" to describe this muscular complex.

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Spinalis origin and insertion

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Communication synonym

Then click the link below: Spinalis Flashcards. Cervicis: nuchal ligament and spinous process of C7. Once you've finished editing, click 'Submit for Review', and your changes will be reviewed by our team before publishing on the site. Obturator Externus Muscle Anatomy. Pictured here is a cross-section of a lumbar vertebra. Accept all cookies Manage cookies. Some of them require your consent. You also have the option to opt-out of these cookies. The spinalis capitis muscle originates from the spinous processes of C6 to T2 or the associated nuchal ligament and inserts onto the occiput. The spinalis muscle is a member of the erector spinae muscle group. Here we can see each of the erector spinae highlighted in different colours for clarity. The spinalis cervicis and capitis sections are involved in neck lateral flexion. Make the changes yourself here! In such instances, the spinalis capitis still originates from the spinous processes of C6 to T2 or the associated ligamentum nuchae, but the fibers blend with those of the semispinalis capitis before inserting onto the occiput.

The spinalis is a deep muscle of the back.

Article Talk. This image shows the origin and insertion sites of the spinalis cervicis section. Underlying structures: Spinalis thoracis muscle Spinalis cervicis muscle Spinalis muscle - Insertions. Anatomy, Back, Muscles. Cervicis: nuchal ligament and spinous process of C7. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. The extension is the result of a bilateral contraction. In the pig and the horse, the spinalis muscle forms a common muscle belly, therefore sometimes termed as "spinalis thoracic et cervicis thoracic and cervical spinal muscle ", whereas in ruminants and carnivores, the thoracic and cervical spinalis muscles receive additional muscular strands from the the mamillary and transverse processes of some vertebrae, and the fibers of the spinlais musccles are closely related to and often difficult to separate form the semispinalis muscle. In: StatPearls [Internet]. June Learn how and when to remove this template message.