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RAD 121
Ch. 10 Bony Thorax-Sternum and Ribs
| Question | Answer |
|---|---|
| What are the structures that make up the bony thorax? | a. Sternum b. Thoracic vertebrae c. 12 Pairs of Ribs |
| What is a thin, narrow, flat bone? | sternum |
| How many divisions does the sternum have? | 3 |
| What are the divisions of the sternum? | 1. Manubrium 2. body 3. Xiphoid Process |
| What is the total length of an adult sternum? | 7 inches |
| What is the upper portion of the sternum? | manubrium |
| How big is the adult manubrium? | 2 inches in length |
| What is the longest part of the sternum? | body |
| When does the union of the 4 segments of the sternum begin? When is it complete? | begins during puberty and is complete by age 25 |
| What is the inferior part of the sternum? | the xiphoid process |
| When does the xiphoid process become totally ossified? | around age 40 |
| What is the uppermost border of the manubrium? | jugular notch |
| The jugular notch is at the level of what? | T2-3 |
| What do the lower end of the manubrium and the superior part of the body of the sternum form? | sternal angle |
| The sternal angle is located at the level of what disk space? | T4-5 |
| The xiphoid process corresponds to what level of the vertebra? | T9-10 |
| What level of the vertebra does the inferior rib angle correspond to? | L2-3 |
| Anatomically speaking, how does each clavicle articulate with the manubrium? | laterally |
| What is it called where the clavicles articulate with the manubrium? | clavicular notch |
| What connects directly to the sternum? | the clavicles and the first 7 pairs of ribs |
| What is located below each clavicular notch and sternoclavicular joint? | a depression or facet for articulation with the cartilage of the first rib |
| Do the anterior ribs unite directly to with the sternum? | no |
| What is the cartilage that connects the anterior ribs to the sternum? | costocartilage |
| Where does the second costocartilage connect to the sternum? | the level of the sternal angle |
| Which costocartilages connect to the body of the sternum? | 3rd-7th |
| Do ribs 8, 9, and 10 connect to the sternum via costocartilage? | no |
| What ribs are considered true ribs? | 1-7 |
| What ribs are considered false ribs? | 8-12 |
| What ribs are considered floating ribs? | 11 and 12 |
| How do the true ribs attach to the sternum? | directly by its own costocartilage |
| How do the false ribs connect to the sternum? | They each have costocartilage which attaches to the costocartilage of the 7th rib |
| What ribs do not possess costocartilage? | 11 and 12 |
| What are ribs 1-7 termed? | true ribs |
| What are the two ends of each rib? | 1. vertebral end 2. sternal end |
| What is the posterior end of the rib called? | vertebral end |
| What is the anterior end of the rib called? | sternal end |
| What is between the two ends of each rib? | body or shaft |
| What does the vertebral end of the rib consist of? | head and neck |
| What is lateral to the neck on the ribs? | an elevated tubercle |
| What does the elevated tubercle articulate with? | the transverse process of vertebra and also allows attachment of a ligament |
| What is the area of forward angulation? | the angle |
| How much higher is the posterior or vertebral end of a typical rib in relation to the anterior or sternal end? | 3 to 5 inches |
| What does the inside margin of each rib protect? | 1. an artery 2. a vein 3. a nerve |
| What is the inside margin of each rib which contains blood vessels and nerves? | costal groove |
| Where is the bony thorax typically the widest? | at the lateral margins of the 8th or 9th ribs |
| What is the joint between the costcartilage and the sternal end of the rib called? | costocondral union (or junction) |
| What type of joint is the costocondral union or junction? | synarthrodial, no movement |
| What type of joint is the sternoclavicular joint? | synovial-gliding motion, |
| Which sternocostal joints are cartilaginous or synchondrosis type? | the sternocostal joint of the first rib |
| Which sternocostal joints are synovial and allow a slight plane or gliding motion? | the second through seventh joints |
| Where are the interchondral joints located? | between the costcartilages of the anterior sixth through ninth rib |
| What are the ninth and tenth cartilage joints called? What are they classified as? | interchondral joints, fibrous joints |
| What are the joints between the ribs and the vertebral column? | costotransverse joints and costovertebral joints |
| What are the costotransverse joints classified as? | synovial, plane or gliding motion |
| On what ribs are costotransverse joints found? | first through tenth rib |
| On what ribs are the costovertebral joints found? | all of them |
Created by:
eheaden
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