Inspiration
• Primary muscles: diaphragm, scalenes, parasternals
• Accessory muscles: sternocleidomastoids, upper trapezius, pectoralis major and minor, subclavius, and possibly the external intercostals
Expiration
• Primary muscles: none active during tidal (resting) expiration
• Accessory muscles: abdominals including the rectus abdominis, transversus abdominis, and internal and external obliques; pectoralis major; and possibly the internal intercostals
Parasternal intercostals. The parasternals, a portion […]
