thoracic wall Flashcards by Emily Clipston

suprasternal notch @

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sternal angle @

T4-T5

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xiphosternal @

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costal margin @

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thoracic outlet syndrome

symptoms involving structures in superior thoracic aperature (trachea, esophagus, vessels, and n’s)

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upper limit of thoracic cavity

suprapleural membrane

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true ribs

upper 7, attached to sternum

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false ribs

8-10 indirectly attached thru cartilage

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floating ribs

11+12

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diaphragm innervation

C345

sensory:
- central: phrenic
- peripheral: innercostal
motor: phrenic

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external intercostal muscle mvmt

elevate ribs

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internal intercostal mucles mvmt

depress ribs

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ext intercostal direction

hands in pockets

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int intercostal direction

hands in neighbors pockets, at rt angles to ext IC

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innermost intercostal muscle action

depresses ribs

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innermost intercostal muscles

transversus thoarcis
innermost intercostal
subcostal

internal thoracic A branches

superior epigastric

musculophrenic

sup epigastric course

goes under rectus abdominis

musculophrenic course

laterally and down alont the costal cartilage margin

ant and post IC A’s do what

anastomose

posterior intercostal vein

drains into azygous venous system

ant intercostal veins

drain into internal thoracic vein

intercostal nerves

innervate all IC muscles
Ventral T2-T11
somatic motor
somatic sensory
sympathetic

subcostal nerve

ventral T12

travels in costal grooves

ant/post thorax mvmt

pump handle mvmt of ribs 2-6 and sternum

vertical dimension thorax mvmt

increased be depression and contraction of the diaphragm

lateral dimension thorax mvmt

increased by bucket handle mvmt of lower ribs 7-10

ant/post mvmt at costotransverse joint

pump handle, upper ribs, rotation

lateral mvmt at costotransverse joint

bucket handle, lower ribs, gliding

articulation of ribs and vertebrae

rib articulates with the superior facet of the same level vertebrae and the inferior facet of the vertebrae at the level above it very little mvmt

VAN

runs below costal grooves of ribs between 2nd and 3rd muscle layers