The deltoid muscle is a prominent muscle located in the shoulder region. It is a triangular-shaped muscle responsible for a wide range of shoulder movements, including abduction (lifting the arm away from the body), flexion (raising the arm forward), and extension (moving the arm backward). The deltoid muscle is divided into three distinct sections: anterior, lateral, and posterior. These divisions allow for its multifunctional role in shoulder mobility.
The anterior portion of the deltoid is primarily responsible for shoulder flexion. Trigger points in this section of the muscle can often result in localized pain or discomfort in the front of the shoulder. Additionally, referred pain from trigger points in the anterior deltoid can be felt down the front of the arm, mimicking conditions like biceps tendinitis or nerve compression.
The posterior deltoid, on the other hand, plays a crucial role in shoulder extension and horizontal abduction. Trigger points in this region can lead to pain in the back of the shoulder, and this discomfort may refer down the arm, resembling symptoms of rotator cuff issues or nerve impingement.
Understanding the anatomy and trigger points within the deltoid muscle is essential for diagnosing and addressing shoulder pain effectively. Whether due to overuse, strain, or other factors, identifying and addressing trigger points in the deltoid can help individuals alleviate discomfort and restore proper shoulder function.
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00:00 - The Anterior Deltoid
00:40 - Anterior Deltoid TrPs
01:55 - The Posterior Deltoid
02:07 - Posterior Deltoid TrPs
