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The posterior scalene, (Latin: scalenus posterior) is the smallest and most deeply seated of the scalene muscles. It arises, by two or three separate tendons, from the posterior tubercles of the transverse processes of the lower two or three cervical vertebrae, and is inserted by a thin tendon into the outer surface of the second rib, behind ...
Upper Limb, Arm, Posterior compartment, right/left long head: infraglenoid tubercle of scapula lateral head: posterior humerus (above radial sulcus) medial head: posterior humerus - (below radial sulcus) olecranon of ulna: deep artery of arm: radial nerve: extends forearm, adducts shoulder (long head). medial head does not function at shoulder.
From this origin, they proceed downward and laterally to be inserted into the posterior border of the lateral third of the clavicle. The middle fibers, or transverse of the trapezius arise from the spinous process of the seventh cervical (both in the back of the neck), and the spinous processes of the first, second, and third thoracic vertebrae.
Research supports this: Focusing on specific muscles during exercises, like the bench press, can significantly increase their activation, particularly when using moderate weights, a 2016 study ...
Posterior scalenes: Turn head 30 degrees away and lift anterior 3-5: Pectoralis minor: Push ipsilateral elbow towards opposite ASIS. 6-8: Serratus Anterior: Push arm anteriorly 9-11: Latissimus dorsi: Patient pushes the ipsilateral arm into adduction against resistance. 12: Quadratus Lumborum: Patient pushes the ipsilateral arm into adduction ...
Examples of such muscles are the accessory muscles of respiration where the sternocleidomastoid and the scalene muscles (anterior, middle and posterior scalene) are typically considered accessory muscles of respiration. [6]
There is no definitive list of accessory muscles, but the sternocleidomastoid and the scalenes (anterior, middle, and posterior) are typically included, as they assist in elevating the rib cage. [4] The involvement of these muscles seems to depend on the degree of respiratory effort.
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