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It has been thought that the tripod position optimizes the mechanics of respiration by taking advantage of the accessory muscles of the neck and upper chest to get more air into the lungs. [4] [5] With the position of the arms secure, contraction of the pectoralis results in elevation of the anterior wall of the chest. [6]
It makes up the bulk of the chest muscles and lies under the breast. Beneath the pectoralis major is the pectoralis minor muscle. The pectoralis major arises from parts of the clavicle and sternum, costal cartilages of the true ribs, and the aponeurosis of the abdominal external oblique muscle; it inserts onto the lateral lip of the bicipital ...
Overall chest pain is a symptom of up to 48% of sudden-onset panic attacks, and 10% of gradual-onset panic attacks. [12] Anxiety: Generalized anxiety disorder (GAD) is characterized by persistent and excessive worry, often accompanied by physical symptoms such as chest pain, restlessness, fatigue, and muscle tension [34]
Pectoralis minor syndrome (PMS) is a condition related to thoracic outlet syndrome (TOS) that results from the pectoralis minor muscle being too tight. [1] PMS results from the brachial plexus being compressed under the pectoralis minor [2] while TOS involves compression of the bundle above the clavicle. In most patients, the nerves are ...
On a chest radiograph, subcutaneous emphysema may be seen as radiolucent striations in the pattern expected from the pectoralis major muscle group. Air in the subcutaneous tissues may interfere with radiography of the chest, potentially obscuring serious conditions such as pneumothorax. [18] It can also reduce the effectiveness of chest ...
Deep muscles of the chest, including pectoralis minor, serratus anterior, and subclavius (Gray 1918) Pectoralis major is a thick, fan-shaped or triangular convergent muscle, which makes up the bulk of the chest muscle. It lies under the breast. It serves to flex, extend, and rotate the humerus, the long bone of the upper arm. Pectoralis minor ...
The pain is agitated by expansion and contraction of the chest. Taking a deep breath and allowing the rib cage to fully expand can relieve the pain, however it will feel unpleasant initially. At the point of full expansion, it can feel like a rubber band snap in the chest, after which the initial pain subsides.
The pectoralis minor muscle was translocated from under the pectorialis major muscle to the lateral chest wall, so that its EMG signals would not interfere with those of the pectoralis major muscle, and it is also a fourth muscle target. [6] The ulnar nerve was then transferred to the moved pectoralis minor muscle. [6]