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Muscles that Move the Arm

Muscles that Move the Arm

Nine muscles are involved in arm movements. Two of these, the pectoralis major and latissimus dorsi, originate from the axial skeleton and are called axial muscles. The other seven originate from the scapula and are called the scapular muscles.
The pectoralis major has two origins. Its clavicular head originates on the medial half of the clavicle. In contrast, the sternocostal head originates on the costal cartilages of ribs 1-6, the sternum, and the aponeurosis of the external oblique of the...

Muscles that Move the Forearm

Muscles that Move the Forearm

The muscles that move the forearms can be divided into four groups: forearm flexors, forearm extensors, forearm pronators, and forearm supinators. The flexors and extensors act on the elbow joint, while the pronators and supinators act on the radioulnar joints.
Forearm Flexors
The biceps brachii, brachialis, and brachioradialis are forearm flexors. The biceps brachii is made up of two heads. Its long head originates at the supraglenoid tubercle of the scapula, whereas that of the short head is...

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Related Experiment Video

Updated: Apr 16, 2026

Author Spotlight: Exploring the Complexities of Achilles Tendon Injuries — Research and Future Directions

Author Spotlight: Exploring the Complexities of Achilles Tendon Injuries — Research and Future Directions

Published on: October 27, 2023

Triceps tendon rupture: an uncommon orthopaedic condition.

Jamshed Jal Bunshah¹, Sagar Raghuwanshi¹, Deepak Sharma²

¹Department of Orthopedics, BD Petit Parsee General Hospital, Mumbai, Maharashtra, India.

BMJ Case Reports

|March 14, 2015

Summary

Early diagnosis and surgical repair of triceps tendon ruptures are crucial for optimal outcomes. Prompt intervention leads to significant functional recovery in patients with this rare orthopaedic injury.

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Modified Long Head of Biceps Tendon Rerouting and Fixation as Partial Capsular Reconstruction for Massive Irreparable Rotator Cuff Tears

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Published on: March 6, 2026

Area of Science:

Orthopaedic Surgery
Traumatology

Background:

Triceps tendon disruption is an uncommon yet severe injury.
Delayed or incorrect management can result in poor functional prognosis.

Observation:

A weightlifter presented with posterior elbow pain and ecchymosis after a fall.
Clinical findings included weakness in elbow extension.
Radiography revealed a small bony avulsion near the olecranon.

Findings:

The patient underwent primary triceps tendon repair within three days.
Post-operative rehabilitation was initiated promptly.
The patient achieved a Mayo elbow score of 85, indicating significant functional improvement.

Implications:

This case highlights the importance of early and accurate diagnosis of triceps ruptures.
Timely surgical intervention and rehabilitation are key to successful patient outcomes.
Emphasizes the need for prompt management in traumatic elbow injuries.