Flashcards in Anatomy of the vertebral collumn Deck (72)
How many vertebrae are there in the back?
(30 if you count coccyx as one)
How many regions are there in the spine, and what are they called?
How many vertebrae are there in each region of the spine?
CERVICAL - 7
THORACIC - 12
LUMBAR - 5
SACRAL - 5
COCCYGEAL - ~4
Which vertebra is most prominent?
How much of the vertebral column is made up of inter-vertebral discs?
1/4 of the length
What features are there on the vertebral arches? (2)
How many articular facets are there on each vertebra?
How many transverse processes are there on each vertebra?
How many spinous processes are there on each vertebra?
Where are the vertebral notches located?
Superior and inferior to the pedicles.
What do adjacent vertebral notches form?
What passes through intervertebral foramen?
How do typical cervical vertebrae vary from normal? (3)
-bifid transverse process
-foramina in transverse processes
Why do cervical vertebrae have bifid transverse processes?
>>wide range of movement
What passes through the foramina in cervical vertebrae?
Vertebral artery and vein
Why is dislocation of cervical vertebrae relatively likely?
Flat articular surfaces.
What are the different severities of a cervical vertebra dislocation?
Which 2 cervical vertebrae are atypical?
Which cervical vertebra has no spinous process or body?
What does the atlas consist of posteriorly and anteriorly?
Posterior & anterior arches
What do the posterior and anterior arches of the atlas (C1) contain?
A tubercle and a lateral mass.
Where does the transverse ligament connect to the atlas?
Tubercle on the medial surface of the lateral mass.
What is the function of the transverse ligament (atlas)?
Holds the dens of the axis in place.
What are the 2 large flat surfaces on the superior surface of the axis called?
Superior articular facets.
-atlas rotates upon them
What is another name for the dens?
What holds the dens in place, and what does this prevent?
The transverse ligament of atlas.
-prevents horizontal displacement
Why is the dens prone to fracture?
Less dense bone.
What causes dens fractures?
What shape is a thoracic vertebral body?