Educational resource developed at the Veterinary Anatomy Section, ICAR-Indian Veterinary Research Institute (ICAR-IVRI), Bareilly.
📝 STANDARD DESCRIPTION:
Type: Intrinsic, Brachial (Synthetic)
Origin: Lateral supracondylar crest of humerus
Insertion: Lateral aspect of olecranon
Function: Extends elbow; prevents joint capsule pinching during extension.
📚 DETAILED DESCRIPTION:
THE JOINT PROTECTOR
A small muscle located deep to the lateral head of the triceps, serving a specialized protective function.
STABILIZOR FUNCTION: While it assists in elbow extension, its primary role is mechanical protection. During terminal elbow extension, the anconeus provides caudolateral support preventing the olecranon from displacing medially while simultaneously keeping the joint capsule taut.
CAPSULAR PROTECTION: Prevents the joint capsule from being pinched between the olecranon and the humeral condyle during full extension—a common source of pain and synovitis if not mechanically protected.
RELATIONSHIPS: Lies directly deep to the lateral head of triceps; identified during deep dissections of the lateral elbow approaches.
// COMPARATIVE ANALYSIS
| DOG |
Similar function; more distinct separation from triceps. |
| HORSE |
Present but less distinct; often considered part of triceps complex. |
CLINICAL RELEVANCE
El Joint Approach: Must be identified and preserved during lateral arthrotomy approaches to prevent post-operative capsular entrapment.
