Full Title: Brachialis

Author: Mary Colven

Date of Publication: August 29, 2012


Research Paper Text:

Reason for name: Brachial is Latin meaning: pertaining or belonging to the arm.
Action: To flex the elbow
Size: Approximately 1/4 the length of the front leg
Location: The brachialis is located in the long, thin muscle that is in the brachialis groove of the humerus. Distally, it runs medial to the origin of the extensor carpi radialis.
Origin Sites: Proximocaudal humerus – proximal third of lateral surface of the humerus.
Insertion Sites: Inserts by a terminal tendon on the medial side of the proximal end of the ulna
Tendons & Ligaments involved: a large part of its lateral surface is covered by the lateral head of the triceps

Blood Supply:

  • Innervations: musculocutaneous nerve
  • Diagram: See below for quick view, see attached for detailed musculature, skeletal and cross section.

Information of Interest

According to Wendy Baltzer at Oregon State University, College of Veterinary Medicine, care and rehab of brachialis can be optimized by the following: Strengthen the brachialis muscle is performed by active range of motion exercises such as walking over cavalettis (the higher the bar the more work the brachialis muscle does), swimming, underwater treadmill work, and down to sit exercises. In cases withseverely atrophied brachialis muscle, electrical stimulation (e-stim) of the muscle may need to be employed.


  1., “Canine Forelimb Anatomy.” 2010.
  2., thoracic-limb-muscles-canine-flash-cards.
  3. Miller’s Guide to Dissection of the Dog, 1980. Evan & deLahunta; WB Saunders Company – Diagrams on page 28, figure 16; page 22, Figure 13, and page 32, Figure 18.
  4. Approaches to the Physical Rehabilitation of Dogs and Cats with Chronic Neurologic and Musculoskeletal Disorders, Wendy Baltzer, DVM, PhD, DACVS, Oregon State University, College of Veterinary Medicine

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