Intercostal muscle actions Flashcards by Abigail Kent | Brainscape

Q

diaphragm

A

contraction during inspiration (increase volume, decrease pressure of thoracic cavity)
forced contraction (for defecation, urination, childbirth)

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Q

internal intercostals

A

interosseous part: aid in expiration (depress ribs; decrease thoracic volume)
interchondral part: aid in inspiration ( elevate ribs; increase thoracic volume)

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Q

external intercostals

A

aid in inspiration (elevate ribs; increase thoracic volume)

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Q

innermost intercostals

A

aid in expiration ( depress ribs; decrease thoracic volume)

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Q

subcostals

A

depress ribs

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Q

transversus thoracis

A

depress ribs

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