Where is the dog's scapulohumeral joint? - briefly
The scapulohumeral joint in dogs is located where the humerus (upper arm bone) meets the scapula (shoulder blade). This joint facilitates the movement of the forelimb and is crucial for a dog's mobility.
Where is the dog's scapulohumeral joint? - in detail
The scapulohumeral joint, also known as the shoulder joint, is located at the point where the humerus (upper arm bone) meets the scapula (shoulder blade). In dogs, this joint facilitates a wide range of motion, allowing them to perform various movements such as walking, running, and swimming. The complex structure of the scapulohumeral joint includes several components that work together to provide stability and mobility.
The humeral head is the rounded end of the humerus that articulates with the glenoid cavity, a shallow depression on the ventral surface of the scapula. This articulation allows for significant movement in multiple planes, including flexion, extension, abduction, adduction, and rotation. The joint capsule, which encloses the humeral head and glenoid cavity, provides additional support and helps maintain the integrity of the joint.
Additionally, several muscles and ligaments play a crucial role in the stability and function of the scapulohumeral joint. The rotator cuff muscles, including the supraspinatus, infraspinatus, teres minor, and subscapularis, surround the humeral head and assist in maintaining its position within the glenoid cavity during movement. Ligaments such as the coracohumeral ligament further reinforce the joint by preventing excessive motion and dislocation.
Understanding the precise location and structure of the scapulohumeral joint is essential for veterinary professionals, as it enables them to accurately diagnose and treat conditions affecting this critical joint in dogs.