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Bony Thorax
| Question | Answer |
|---|---|
| what forms the bony thorax | -sternum -12 pairs of ribs -12 thoracic vertebrae |
| is the posterior of the bony thorax longer or shorter than the front | longer |
| how long is the sternum | 6" long |
| what is the purpose of the sternum | -attachment for costal cartilages of first seven pairs of ribs at lateral borders -forms SC joints -supports clavicles at manubrial angles |
| what are the three parts of the sternum | -manubrium(most superior) -body(gladiolus) -xiphoid process(most inferior)(ensiform)[top at T9 and tip at T10] |
| -quadrilateral in shape -widest portion of sternum -jugular notch at superior border *palpable landmark *lies at T2-T3 interspace -has a clavicular notch where sternoclavicular joints are | manubrium |
| which ribs are considered true ribs | 1st seven |
| -longest portion of sternum(about 4") -joined to another portion of sternum to create sternal angle -sternal angle is palpable and lies at T4-T5 -provides attachment for costal cartilage of first seven ribs at lateral border | Body of sternum |
| -most distal portion of sternum -often deviates from midline -useful landmark -tip lies over T10 and body lies over T9 | xiphoid process |
| funnel chest/caved chest/cereal chest | pectus excavum |
| pigeon chest/bulges out/extra bone | pectus carinatum |
| how many pairs of ribs to we have | -12(may increase with presence of a cervical or lumbar rib)*number corresponds to thoracic vertebrae to which it attaches |
| what classification of bone are the ribs | flat |
| anterior ends of ribs lie higher or lower than posterior ends | lower |
| what plane do the ribs sit in | oblique |
| intercostal space is made up of what | intercostal muscle(important during respiration) |
| ribs vary in _____ and _____ | -length -width (increase in length from 1-7, then decrease from 8-12) |
| which ribs are false ribs | 8-12 |
| which ribs are floating | 11 and 12 |
| tubercle of rib articulates with _____ | transverse process |
| head of rib articulates with ______ | vertebral body |
| what are the 2 extremities of ribs | vertebral and sternal |
| typical rib consist of ? | -head -neck -tubercle -body -costal angle(lots of nerves sit here) |
| costovertebral joint | head of rib and facet of vertebrae |
| costotransverse joint | tubercle of rib and transverse process |
| costochondral | between anterior extremities and costal cartilage |
| sternoclavicular joint classification | synovial/gliding.freely moveable |
| costovertebral: 1st-12th classification | synovial/gliding/freely moveable |
| costotransverse: 1st-10th classification | synovial/gliding/freely moveable |
| costochodral: 1st-10th classification | cartilaginous/synchondroses/immovable |
| sternocostal: 1st rib classification | cartilaginous/ synchondroses/ immovable |
| sternocostal: 2nd-7th classification | synovial/gliding/freely moveable |
| interchodral: 6th-9th classification | synovial/gliding/freely moveable |
| interchondral: 9th-10th classification | fibrous/syndesmoses/slightly moveable |
| manubriosternal classification | cartilaginous/ symphysis/ slightly moveable |
| xiphisternal classification | cartilaginous/ synchondroses/ immoveable |
| what is it called when the body of the sternum separates from the manubrium | flail chest |
Created by:
bigad1982
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