wicked-naughtily or annoyingly playful; teasing and worrying with impish laughter; a wicked prank. impish, implike, mischievous, pixilated, prankish, puckish, arch. playful-full of fun and high spirits; playful children just let loose from school.
Inspiratory Muscles. The principal muscle of inspiration is the diaphragm, a domed sheet of muscle that separates the thoracic and abdominal cavities. The diaphragm attaches to the lower ribs, as well as to the lumbar vertebrae of the spine.
Primary Muscles. The primary inspiratory muscles are the external intercostals and the diaphragm. muscles of expiration depress them.The muscles of inspiration elevate the ribs and sternum, and the muscles of expiration depress them. . The primary expiratory muscles are the internal intercostals, intercostalis intimi and subcostals.