Thorax Flashcards
Anterior median (midsternal) line
vertical line through sternum in mid-saggital plane
Midclavicular Lines (MCLs)
vertical through mid points of the clavicles, parallel to median line
Anterior Axillary line
vertical line along anterior axillary fold (pec major)
Mid Axillary line
vertical line through apex of axilla
Posterior axillary line
vertical line through posterior fold (formed by latissimus dorsi and teres major)
Posterior median (mid spinal or midvertebral) line
vertical line through spinous processes of vertebrae in mid-saggital plane
Scapular Lines
vertical lines that pass through inferior angles of scapula, line is parallel to posterior median line
Thoracic Wall
Bones: ribs, thoracic vertebrae, sternum
Function: protect thorax (heart, lungs, blood vessels, esophagus)
True Ribs
1-7
attach directly to sternum`
False Ribs
8-10
attach indirectly to sternum
Floating Ribs
11-12
do not attach to sternum
Typical & Atypical
Typical- 3-9 have 2 facets
atypical-1,2 10-12 (1-2 have areas for scalenes to attach, have 2 facets and articulate with 2 vertebral bodies)
Thoracic Vertebrae
costal facets on vertebral body and transverse process, ribs articulate with them
Sternum
made up of manubrium, body and xyphoid process
Manubrium
jugular notch
articulates with clavicle & 1st rib