table 20.3- inevation for inspiration/expiration

C1-C2

sternocleidomastoid and upper trap

C1-C2

requires mechanical ventilation

C3-C4

partial diaphram, levator scapula, and scalenes

C3-C4

mechanical ventilation early but independent in long run

C5

diaphragm, pec major

C5

breath independently, no cough

C6-C8

pec major, pec minor, serratus anterior

C6-C8

breath independently: may or may not have weak cough

T1-T5

intercostal, serratus posterior superior

T1-T5

breath independently, has weak cough

T6-T10

abdominals, serratus posterior inferior

T6-T10

independent breathing, weak to strong cough

T11 and below

all breathing muscles and quadratus lumborum

T11 and below

breath independently, cough independently