Rhomboid Major and Rhomboid Minor Anatomy: Origin, Insertion, Action

Rhomboid Major and Rhomboid Minor Muscles Anatomy Study: Origin, Insertion, Action, Innervation and Blood Supply

Rhomboid Major and Rhomboid Minor Muscles Anatomy

Rhomboid Major

Origin: Spinous processes of T2 – T5
Insertion: Vertebral border of the scapula, from inferior to the scapular spine to the inferior angle
Action: Retraction of the scapula, downward rotation of the scapula
Innervation: Dorsal scapular nerve C5
Blood Supply: Dorsal scapular artery

Synergist: Pectoralis major and minor, Subclavius, Serratus anterior, Latissimus dorsi, Trapezius, Rhomboid minor, Levator scapulae.

For pain and symptom information see: Rhomboid Major and Minor Pain and Symptoms

Primary Actions of the Rhomboid Major:

1. Retraction of the scapula

  • Agonists: Trapezius (middle fibers), Rhomboid Minor
  • Antagonists: Serratus Anterior, Pectoralis Minor

2. Downward rotation of the scapula

  • Agonists: Levator Scapulae, Serratus Anterior (upper fibers), Rhomboids Minor, Pectoralis Minor, Trapezius (middle fibers)
  • Antagonists: Trapezius (upper fibers), Trapezius (lower fibers), Serratus anterior (lower fibers)

Rhomboid Minor

Origin: Ligamentum Nuchae and the spinous processes of C7 and T1
Insertion: Vertebral border of the scapula, adjacent to the scapular spine.
Action: Retraction of  the scapula, downwar rotation of the scapula
Innervation: Dorsal scapular nerve C5
Blood Supply: Dorsal scapular artery
Synergist: Pectoralis major and minor, Subclavius, Serratus anterior, Latissimus dorsi, Trapezius, Rhomboid minor, Levator scapulae.

Primary Actions of the Rhomoboid Minor:

1. Retraction of the scapula

  • Agonists: Trapezius (middle fibers), Rhomboid Major
  • Antagonists: Serratus Anterior, Pectoralis Minor

2. Downward rotation of the scapula

  • Agonists: Levator Scapulae, Serratus Anterior (upper fibers), Rhomboid Major, Pectoralis Minor, Trapezius (middle fibers)
  • Antagonists: Trapezius (upper fibers), Trapezius (lower fibers), Serratus anterior (lower fiber)

3. Stabilizer: Trapezius (middle part)

 


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

 

 

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