May 122013
 

Semispinalis Cervicis Anatomy:

Origin: By fleshy and tendinous fibers to the transverse processes of (T1 – T6)
Semispinalis Cervicis Anatomy
Insertion: Spinous processes of C2 to C5, spanning four to six levels between attachment points
Action: Extension of the cervical spine, lateral flexion of the cervical spine, rotation of the cervical spine
Innervation: Dorsal primary rami of (C3-C5)
Blood Supply:Descending branches of the occipital artery and the superior intercostal artery, via the dorsal rami of the upper two posterior intercostal arteries

 Primary Actions of the Semispinalis Cervicis:

1. Extension of the cervical spine when acting bilaterally

  • Agonists: Longissimus Cervicis, Iliocostalis Cervicis, Spinalis Cervicis, Splenius Cervicis
  • Antagonists: Longus Colli (superior and inferior oblique and vertical intermediate), Scalenus Anterior and Medius

2. Lateral flexion of the cervical spine when acting unilaterally

  • Agonists: Scalene Muscles, Iliocostalis Cervicis, Splenius Cervicis
  • Antagonists: Scalene Muscles, Iliocostalis Cervicis, Splenius Cervicis on the opposite side

3. Contralateral rotation of the cervical spine when acting unilaterally

  • Agonists: Multifidus
  • Antagonists: Multifidus on the opposite side

4. Extension of the thoracic spine when acting bilaterally

  • Agonists: Iliocostalis Cervicis, Thoracis and Lumborum, Longissimus Cervicis and Thoracis, Spinalis Thoracis, and Semispinalis Thoracis
  • Antagonists: Rectus abdominis

5. Contralateral rotation of the trunk when acting unilaterally

  • Agonists: Semispinalis Thoracis, Multifidus, External Oblique
  • Antagonists: Semispinalis Thoracis, Multifidus, External Oblique on the opposite side

Secondary Actions of the Semispinalis Cervicis:

6. Assists with lateral flexion of the thoracic spine when acting unilaterally

  • Agonists: Iliocostalis Cervicis, Thoracis, and Lumborum, Longissimus Cervicis and Thoracis, External and Internal Obliques
  • Antagonists: Iliocostalis Cervicis, Thoracis, and Lumborum, Longissimus Cervicis and Thoracis, External and Internal Oblique on the opposite side.

 

For more information see: Semispinalis Cervicis Muscle: Head and Neck Pain

 

Recommended Anatomy Books

coloring_book
The Anatomy Coloring Book is one of the best study and reference books for beginning anatomy students. The diagrams are clearly labeled and allow you to see the relationship and placement of the various structures of the body. You will also be surprised how the act of coloring will help with recall. But this is not just a beginners book, it is also great for practitioners and therapists to have on hand to use with clients and patients to use as a visual reference.
basic_clinical_massa


Out of the scores of books in my office Basic Clinical Massage Therapy is by far the most referenced book in my library. The musculoskeletal system is overlaid on human models allowing you to learn the precise location, origin and insertions of each muscle. The models are pictured in various poses throughout the book which also helps you visualize muscles in motion and their actions relationship with the skeletal structure and other muscles. Though it is written for massage therapists, it is an excellent book for anyone who wants to learn about the muscular system. MT’s will benefit from recommended treatments for each muscle.

 

References:

The Trigger Point Therapy Workbook – Claire Davies, Amber Davies, and David G. Simons

Basic Clinical Massage Therapy: Integrating Anatomy and Treatment – James H. Clay and David M. Pounds

Trigger Point Therapy for Myofascial Pain – Donna Finando and Steven Finando

Massage Therapy Principles and Practice – Susan Salvo

Theory & Practice of Therapeutic Massage – Mark Beck

 

 

 May 12, 2013  Posted by  Anatomy Study, Back Anatomy Tagged with: ,

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