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Major muscles of respiration and accessories

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The major muscles of inspiration are the external intercostal muscles and diaphragm .<br />
The accessory muscles are the subclavian sternocleidomastoid (pulls the clavicle and sternum upward to increase the chest cavity superiorly), the scalene muscles (three scalene muscles help raise the uppermost two ribs) and the pectoralis minor .<br />
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Inspiratory muscles: The main ones are diaphragm and muscles Intercostal external . Their function is to produce increased ribcage. The contraction of the diaphragm promotes the reduction of the bottom of the ribcage, which expands vertically. The external intercostal muscles elevate the cervical and anterior rib cage, changing the angle of the ribs and elongating the anteroposterior thickness of the rib cage. Inspiration is an active phenomenon ribcage expansion, mainly due to contraction of the inspiratory muscles, which constitute a true respiratory pump.<br />
Expiratory muscles: Principals Are abdominals and internal intercostal . Their function is to produce the decrease in rib cage. The abdominal pull down the chest reducing the thickness and force the upward displacement of the abdominal contents, which also pushes up the diaphragm decreasing the size of the thoracic cavity. The internal intercostal exert traction ribs down, it decreases the size of the chest. Normally the expiration is passive and occurs mainly by relaxing the diaphragm.

The major muscles of inspiration are the external intercostal muscles and diaphragm . The accessory muscles are the subclavian sternoclei...

What is Respiratory muscles

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As respiratory muscles those are skeletal muscles called that in an expansion or contraction of the rib cage and thus lead to an inhalation and exhalation. The most important respiratory muscle is the diaphragm ( diaphragm ). The each come into action muscles depend heavily on the breathing technique ( chest breathing or abdominal breathing ).<br />
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During normal breathing, the muscles play only for the inspiration a role (inhalation). For this purpose, an expansion of the chest is required, the so-called through inspiratory muscles will be realized ("backers"). To produce a higher negative pressure in the pleural space , and thus an extension of the lung , whereby air is sucked. The exhalation takes place is mostly produced passively by slackening the muscles. Because of the elastic fibers in the lung tissue pulls together this and presses the air out of the lungs. Only with increased respiration or lung disease exhalation (must also accessory muscles expiratory "Exspiratoren") are supported.

As respiratory muscles those are skeletal muscles called that in an expansion or contraction of the rib cage and thus lead to an inhalatio...