The diaphragm is stimulated the same way all other muscles are - nerve impulses that originate in the brain (or sometimes the spinal cord). The intercostal muscles expand during inhalation and contract during exhalation in response to the movement of the lungs by the diaphragm.
The Phrenic Nerve-Diaphragm and the External Intercostal Nerve-External intercostal muscles
The intercostal muscles. Intercostal means "between ribs".
The diaphragm and external intercostal muscles are primarily involved in changing the thoracic volume during breathing. The diaphragm contracts during inhalation to increase thoracic volume, while the external intercostal muscles help lift and expand the rib cage.
the intercostal muscles and the diaphragm
The diaphragm (a sheet of muscle underneath the ribcage) and intercostal muscles (located between your ribs).
During a period of relaxed and average respiration, the muscles associated with inspiration, or the process of inhaling, include the muscles of the diaphragm, the external intercostal muscles, and the interchondral region of the internal intercostal muscles.
Diaphragm and intercostal muscles.
Children primarily use their diaphragm and intercostal muscles to breathe. The diaphragm contracts and moves downward, expanding the chest cavity, while the intercostal muscles between the ribs help to further expand the chest for breathing in.
an exhalation
The diaphragm and the external intercostal muscles.
suspensory ligaments
The primary muscles involved in normal breathing are the diaphragm and the intercostal muscles. The diaphragm contracts and moves downward, while the intercostal muscles between the ribs help expand the chest cavity, allowing air to be drawn into the lungs.