What causes infraspinatus trigger points?
It’s usually caused by repetitive stress or normal aging. A complete, or full-thickness, tear severs the infraspinatus from the bone. It’s usually caused by an acute injury, such as falling.
What is a trigger point referral pattern?
Trigger points are discrete, focal, hyperirritable spots located in a taut band of skeletal muscle. They produce pain locally and in a referred pattern and often accompany chronic musculoskeletal disorders.
What is an insertion point for the infraspinatus muscle?
These muscles act to stabilize and move the glenohumeral joint. The infraspinatus and teres minor act synergistically as external rotators of the shoulder. Infraspinatus. Origin: infraspinous fossa. Insertion: greater tubercle of the humerus.
What is the pain referral pattern for an active trigger point in the infraspinatus muscle?
Infraspinatus Pain Referral Patterns The most common pain pattern from infraspinatus trigger points is an intense, deep pain in the front of the shoulder. The can radiate over the anterior deltoid muscle down over the biceps brachii, and even down to the radial forearm and hand.
What is trigger point referred pain?
In this condition, pressure on sensitive points in your muscles (trigger points) causes pain in the muscle and sometimes in seemingly unrelated parts of your body. This is called referred pain. This syndrome typically occurs after a muscle has been contracted repetitively.
What is the defining symptom when a trigger point is pressed?
A Trigger Point (TrP) is a hyperirritable spot, a palpable nodule in the taut bands of the skeletal muscles’ fascia. Direct compression or muscle contraction can elicit jump sign, local tenderness, local twitch response and referred pain which usually responds with a pain pattern distant from the spot.
What movement does the infraspinatus perform?
Action. Infraspinatus is the main external rotator of the shoulder joint. It assists in producing shoulder extension. With the arm fixed, it abducts the inferior angle of the scapula.
What action does the infraspinatus muscle perform?
In human anatomy, the infraspinatus muscle is a thick triangular muscle, which occupies the chief part of the infraspinatous fossa. As one of the four muscles of the rotator cuff, the main function of the infraspinatus is to externally rotate the humerus and stabilize the shoulder joint.
How do you activate infraspinatus?
The side-lying wiper exercise is a novel and effective exercise for selectively activating the infraspinatus muscle while minimizing the use of the posterior deltoid and middle trapezius muscles.
What nerve innervates the infraspinatus muscle?
The suprascapular nerve
The suprascapular nerve has a motor and sensory innervation. Its motor innervation is to the supraspinatus and infraspinatus muscles.
What exercise targets the infraspinatus?
What is a muscle referral pattern?
Referral or referred pain is when there is pain in a specific muscle but creates pain in another area of the body. For example, if there is a trigger point in the Trapezius muscle (upper back/ Shoulder area), it can refer pain up towards the head and neck and cause tension headaches or even migraines.
What is a trigger point classification?
Research has identified two different types of trigger points: active and latent. Active trigger points produce pain constantly or during movement, and can reduce the flexibility of muscles, while latent trigger points are only painful when they’re compressed.