Triceps Brachii

Origin

• Long Head
  • Infraglenoid tubercle of the Scapula
• Medial Head
  • Posterior surface of the Humerus (inferior to radial groove)
• Lateral Head
  • Posterior surface of the Humerus (superior to radial groove)

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Insertion

• Ulna (on the olecranon)
• Nonspecific fascial insertions on the forearm

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Actions

• All Heads
  • Extension of forearm (at the elbow)
• Long Head
  • Extension and Adduction of the arm (at the shoulder)

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Vascular Supply

• Deep Brachial Artery

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Nerve

• Radial Nerve (C7-C8)

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Clinical Significance

• Radial Nerve Injury

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See Also

• Physical Exam Shoulder
• Shoulder Anatomy (Main)
• Shoulder Pain (Main)
• Physical Exam Elbow
• Elbow Anatomy (Main)
• Elbow Pain (Main)

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