Lecture Notes on the Humerus by Professor McCarty

Overview

• Examination of the right and left humerus bones.
• Focus on identifying and understanding the major parts and landmarks on the humerus.

Proximal End of the Humerus

• Head: Rounded structure on the medial side.
  • Supported by:
    • Anatomical Neck
    • Surgical Neck
• Lateral Side: Greater tubercle.
• Anterior Side: Lesser tubercle.
• Intertubercular Sulcus/Groove: Located between the greater and lesser tubercle.

Midsection of the Humerus

• Deltoid Tuberosity: Raised ridge on the lateral side.
  • Attachment site for the deltoid muscle.

Distal End of the Humerus

• Condyles:
  • Capitulum: Rounded condyle on the lateral side.
  • Trochlea: Medial, butterfly-shaped condyle (means "pulley").
• Coronoid Fossa: Important for ulna articulation.
• Medial Epicondyle:
  • Known as the "funny bone," as the ulnar nerve passes behind it.
• Lateral Epicondyle: Not listed but present.

Posterior Side of the Humerus

• Olecranon Fossa: Identifies the posterior view of the humerus.
  • Located at the back of the elbow.

Summary

• Identified the structural differences between the left and right humerus.
• Key features to distinguish between anterior/posterior views and medial/lateral orientations.