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(Last Updated On: February 27, 2019)

Extensor Carpi Radialis Brevis: Origin, Insertion, Action, Innervation

Origin: Lateral epicondyle of the humerus via the common extensor tendon and the radial collateral ligament at the elbow
Insertion: Dorsal surface of the base of the third metacarpal
Actions: Extension of the wrist, abducts the hand
Innervation: Radial nerve (C6, C7)
Blood Supply: Radial recurrent artery from the radial artery

Extensor Carpi Radialis Brevis Origin, Insertion, Action, Innervation

Extensor Carpi Radialis Brevis Actions With Agonists and Antagonists

Primary Actions of the Extensor Carpi Radialis Brevis

1. Extension of the wrist

  Agonists:

  • Extensor Carpi Radialis Longus
  • Extensor Carpi Ulnaris

  Antagonists:

  • Flexor Carpi Radialis
  • Palmaris Longus
  • Flexor Carpi Ulnaris

Extensor digitorum, extensor digiti minimi, and extensor pollicis longus assist with extension of the wrist

2. Radial deviation of the wrist

Agonists:

  • Extensor Carpi Radialis Longus
  • Flexor Carpi Radialis

  Antagonists:

  • Flexor Carpi Ulnaris
  • Extensor Carpi Ulnaris

Extensor pollicis brevis and abductor pollicis longus also assist with radial deviation of the wrist.

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Recommended Anatomy Books:

Anatomy 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.

Human Muscle Anatomy

The Trail Guide To The Body is another excellent book to help you learn the musculature of the human body. Though the book is geared toward massage therapists and physical therapist assistants, the book with its illustrations and text helps anyone gain a thorough understanding of the human musculoskeletal system and movement. I highly recommend this book for anyone studying anatomy and believe that MTs, PTAs, and teachers of body movements should have this book in their possession. I also highly recommend this book for the lay person who wants to gain understanding of the muscle, skeletal system and how our bodies move. This book will not disappoint!

Basic Clinical Massage Therapy

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.

Muscle Anatomy Flashcards

Musculoskeletal Anatomy Flashcards Are you a student or professional therapist who needs to brush up on the musculoskeletal system? Dr. Joseph E. Muscolino DC has developed a comprehensive set of flashcards that will help develop a mind's picture of exactly where the muscles lie under the skin. A highly recommended study aid for students. Great for non students who want an easy comprehensive anatomy guide.

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