Exam 3: Anterior Thorax Flashcards
Vertebral levels that correspond to the position of the manubrium sterni
T3-T4
Participants in the sternoclavicular joint
Clavicle, manubrium sterni, costal cartilage of the first rib
Vertebral levels that correspond to the position of the corpus sterni
T5-T9
Number of sternabrae from the corpus sterni
4 sternabrae
Ribs that join with corpus sterni via costal cartilage
Ribs 2-7
Feature of the corpus sterni that is present in 4-7% of the population
Sternal foramen
Causes of sternal foramen
Failure of the ossification centers of the sternum to fuse together normally
What are the classifications of ribs 1 and 2 in typical adult
Atypical
True ribs
Costa verae
Vertebrosternal
Classifications of ribs 8 and 9 in typical adult
Typical
False
Costa spuriae
Vertebrochondral
Classifications of rib 10 in typical adult
Atypical
False
Costa spuriae
Vertebrochondral
Classifications of ribs 11 or 12 in typical adult
Atypical
False
Costa spuriae
Vertebral (floating)
Joint surfaces of costochondral joint
Costal cartilage w/ sternal end of each rib
Joint classification of costochondral joint
Cartilaginous synchondrosis
Joint classification given to joint between sternum, clavicle and 1st rib
Synovial saddle joint
What ribs participate in sternocostal or sternochondral joint
Rib 1-7
Classic classification of 1st sternocostal or sternochondral joint
Cartilaginous synchondrosis
NEWER classification of first sternocostal or sternochondral joint
Cartilaginous symphysis
Classification of 2nd-7th sternocostal or sternochondral joint
Synovial plane
Joint surfaces of 2nd sternocostal/sternochondral joint
Costal cartilage of 2nd rib w/ costal notch II or manubrium, costal notch I of corpus and manubrium symphysis
Joint surfaces of 3-7th sternocostal/chondral joint
Costal cartilage of ribs 3-7 w/ costal notch III-VII of corpus sterni
Classification of 6th-9th interchondral joints
Synovial jplane
Classification of 5-6 or 9-10 interchondral joint
Fibrous syndesmosis
Costal cartilages fail to form a joint at sternal end
11th and 12th costal cartilages
What forms manubriosternal joint
Fibrocartilage layer attaches manubrium to corpus sterni
What sternal joint will ossify by age 40
Joint between corpus sterni and xiphoid process
What is name given to segments of sternum
Sternabrae
How many primary centers of ossification appear in manubrium
1-3 centers
How many primary centers of ossification appear in corpus sterni
Typically 6
Locations of primary centers of ossification in corpus sterni
One in each of first two sternabrae
Bilateral centers in last two sternabrae
Primary centers of ossification for sternum first appear at what age
5th fetal month
What part of sternum will a secondary center of ossification appear
Xiphoid process
When does xiphoid process first demonstrate a center of oss
Sometime during or after 3 years old
When will synchondroses between sternabrae begin to ossify
During puberty
In what part of rib will primary centers of oss appear
The body
In what parts of rib will secondary centers of oss appear
Head, articular surface and non-articular surface of tubercle
Which ribs will demonstrate primary centers of oss for the body
All ribs
Which ribs lack secondary centers of oss
11 and 12
How does rib 1 differ in ossification centers from typical ribs
Rib 1 has 2 secondary centers: head and tubercle
Typical have 3 secondary
How does rib 10 differ in ossification centers from typical ribs
Rib 10 has 2 secondary centers: head and tubercle
