Is It Bad To Use Accessory Muscles To Breathe?
Is It Bad To Use Accessory Muscles To Breathe? Two important accessory muscles of inspiration are the scalene and sternocleidomastoid. Accessory muscle use is one of the earliest signs of airway obstruction. Use of accessory muscles indicates severe disease and signifies that the forced expiratory volume in 1 s (FEV1) is decreased to 30% of