Breathing Muscles Flashcards by Crystal Wood | Brainscape

Q

Diaphragm

A

ORIGIN: cartilage of ribs 7-12, xiphoid process, lumbar vertebrae

INSERTION: anterior longitudinal ligament (vertebral column)

ACTION: expands thoracic cavity, compresses abdominal cavity

INNERVATION: phrenic nerve (C3-5)

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Q

Internal Intercostals

A

ORIGIN: superior border of ribs 2-12

INSERTION: inferior of ribs above (1-11)

ACTION: depresses ribs (forced expiration)

INNERVATION: intercostal nerves

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Q

External Intercostals

A

ORIGIN: lower border of ribs 1-11

INSERTION: upper border of ribs below (1-12)

ACTION: elevates ribs (normal inspiration)

INNERVATION: intercostal nerves

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