Diaphragm: where and how does the muscle contract & what is the result?
Divides thorax & abdomen upon contraction the dome flattens resulting in increased thoracic cavity (widens the cavity)
Muscles for forced or controlled Expiration
(Normal expiration is passive) for controlled or forced: PRIMARILY ABDOMINAL MUSCLES: Rectus & Obliques (external, internal & transverse). May use subcostals, serratus, and internal intercostals
Name the muscles involved in Inspiratio:
Primary muscle is the Diaphram Other muscles used during DEEP INSPIRATION include: External intercostals Accessory muscles of the neck (4SP): Serratus, Subclavius, Sternocleido- mastoid, scalenes, & Pectoralis.
External Intercostals: where, and how does the muscle contract & what is the result
contraction lifts the ribcage upward & outward resulting in increase in the thoracic cavity
Accessory Muscles of the Neck (4S&P): where and how does the muscle contract & what is the result?
Serratus, Subclavius, Sternocleidomastoid, scalenes, & Pectoralis. - lifts the shoulders increasing the vertical dimensions of the thorax
What are the 3 forces that provide respiratory power for phonation?