muscles of inspiration and expiration

Created by dgyates 

Upgrade to
remove ads

18 terms

primary muscles of inspiration during relaxed breathing

diaphragm, external intercostals

diaphragm

dome shaped muscle that divides thoracic and abdominal cavities

diaphragm during inspiration

contracts pulling floor of thoracic cavity inferiorly

diaphragm attachment

xiphoid process, lower 6 ribs, lumbar vertebrae creating central tendon

quiet inspiration

central tendon moves very little

forced inspiration

central tendon descends up to four inches

Major diaphragm apetures (openings)

venal cava foramen, esophageal hiatus, aortic hiatus

external intercostals location

most superficial layer - form V shape bilaterally between bottom of one rib to rib below

external intercostals function

elevate ribs during inspiration (bucket handle)

accessory muscles of inspiration

serratus anterior, pec major, pec minor, upper trap, levator scapulae, SCM, scalenes, rhomboids, serratus posterior superior, levator costarum

elevate muscles during forced inspiration

accessory muscles of inspiration

serratus posterior superior

A- C7 - T3 and ribs 2 - 5. In.- 2-5 intercostal nerves

internal intercostals

primary muscle of expiration

internal intercostals location

between ribs deep and oriented at a right angle to external intercostals, continuous with internal obliques

internal intercostals function

depress ribs during expiration

accessory muscles of expiration

rectus abdominus, external obliques, internal obliques, transversus thoracis, serratus posterior inferior, quadratus lumborum

can help with inspiration and expiration

latissimus dorsi

serratus posterior inferior

A- spinous processes T11 - L3, ribs 9-12, In- 9-12 intercostal nerves

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set