Thorax 2 Flashcards
What does the sternum form
The middle of the anterior part of the thoracic cage
What shape is the sternum
- flat
- elongated bone
What are the three parts of the sternum
- manubrium
- body
- xiphoid process
What is the sternal angle between
The manubrium and the body of the sternum
What is known as the trapezoidal bone
Manubrium
What part of the sternum is the thickest and the widest part
Manubrium
What is known as the easily palates venter of the superior border of the manubrium
The jugular notch
What does the claviclar notch connect
The clavicle and the sternum
What is attached to the lateral border if the manubrium
The costal cartilage of the first rib
Deceive what synchondrosis is
This is where the costal cartilage of the 1st rib meats the lateral border of the manubrium
Is there a synovial joint between the 1st rib and sternum?
No, it is a synchondrosis, that is why there is NO movement between the 1st rib and sternum
The manubristernal is Also called?
The sternal angle of Louis
What is the sternal angle a landmark for
Descending aorta
At what level of the vertebra is the body of the sternum located
From T5-T9
Why does the width of the body of the sternum vary
It varies because of the costal notches on the lateral parts of the sternum
Is the sternum separated or fused when you are born
It’s starts off separated and fuses with adulthood
The joints between the sternebra begin to fuse when
Between puberty and age 25
Tell me when the different sternebrae fuse ( specifically what ages)
*remember these joints begin to fuse from the inferior end
(Closer to jugular notch) 1&2-age 60 2&3-age 25 3&4= age 19 4&5= age 12 5&6= age 40
What ossifies with age in the sternum
The Xiphoid process
What is the smallest and variable part of the sternum
The xiphoid process
At what vertebral level does the xhiphoid process lie
T10
What is cartilaginous in young people but may be ossified in adults
The xiphoid process
What may happen with old people in regards to the xiphoid process and the sternal body
It may fuse with the sternal body and become hardened, people often think it is a tumor
The xiphoid process is a landmark for what
The median plane