Also found in: Acronyms.

in·fra·spi·na·tus (mus·cle)

intrinsic (scapulohumeral) muscle of shoulder joint, the tendon of which contributes to the formation of the rotator cuff; origin, infraspinous fossa of scapula; insertion, middle facet of greater tubercle of humerus; action, extends arm and rotates it laterally; its tonic contraction helps to hold the head of the humerus in the shallow glenoid fossa; nerve supply, suprascapular (from fifth to sixth cervical spinal nerves).
Synonym(s): musculus infraspinatus [TA]



A muscle at the middle of the shoulder blade.
Mentioned in: Tendinitis



infraspinatus muscle
see Table 13.3.
References in periodicals archive ?
Agri veya gucsuzluk nedeni ile zorlanma infraspinatus tendonu lezyonunu gostermektedir (Resim 3) (4).
The PPT of the infraspinatus and posterior deltoid muscles were measured in the prone position.
Partial-thickness, articular-sided tears of the supraspinatus, infraspinatus, or both--found posterosuperiorly at the posterior rotator interval--are common in throwing athletes.
The unilateral muscle ratio - the antagonist/agonist muscle-strength ratio of the infraspinatus and teres minor muscles v.
Las perdidas por coccion fueron menores en los musculos Infraspinatus, Longissimus thoracis y mayores en los musculos Supraspinatus, Triceps brachii, Gluteus medius, Semimembranosus, Semitendinosus, Quadriceps femoris y Biceps femoris (Cuadro 2, p < 0.
The results were quite convincing and the inter-rater agreement for the presence of trigger points in the infraspinatus was over 70%.
In other words, it is easier to see calcification in the supraspinatus tendon on external rotation and in the infraspinatus tendon on internal rotation.
The deltoid and rotator cuff muscles (supraspinatus, infraspinatus, teres minor and subscapularis) act in a synergistic manner to provide a balanced force couple at the glenohumeral joint.
Wiiitis" was first coined by Bonis in describing acute pain of the right infraspinatus as a result of playing Wii Tennis for several hours [35].
A combination of intramuscular and surface electrodes was used to record activity from supraspinatus, infraspinatus, subscapularis, middle trapezius, lower trapezius, serratus anterior and latissimus dorsi.
The path lies between the infraspinatus muscle and the teres minor muscle, with the point of entry 1 cm inferior and 2 cm medial to the posterior angle of the acromion.
The longer the patient has the pain and/or a tear the more the wasting of infraspinatus and supraspinatus may be evident.