Vertebrae, Vertebral Column Flashcards
Purpose of the body of vertebrae?
Support body weight
What is the body primarily composed of?
Spongy bone, with compact bone shell
Purpose of the trabeculae?
Arranged vertically to resist compression
Where are the epiphyseal rims located?
Superior and inferior portions on the outside of the body.
The vertebral arch is split into ______ and _______.
Pedicles and Laminas (R and L)
Are the pedicles or laminae closer to the vertebral body?
Pedicles
What are the boundaries of the vertebral foramen?
Vertebral body and arch (pedicle and laminae)
What does the vertebral foramen contain?
Spinal cord
Vertebral foramen of connecting vertebrae form what?
Vertebral canal
What are the boundaries of the intervertebral foramen?
Floor-Superior vertebral notch of pedicle
Roof-Inferior vertebral notch of pedicle
Posterior-Lamina/zygapophyseal joint
Anterior-Body/disk
What does the intervertebral foramen contain?
Spinal nerve
What are the 7 processes on the vertebrae?
(1) spinous process- project posteriorly
(2) transverse processes- project laterally
(2) superior articular processes- form 2 zygapophysial joints with inferior articulation process of vertebrae above.
(2) inferior articular processes- form 2 zygapophysial joints with superior articulation process of vertebrae below.
What is the angle between the spinous process and the transverse process called?
Gutter
What are the articulations between 2 vertebrae?
- Body to body via disk and uncovertebral joint
- R and L inferior articular facets with superior articular facets
The inferior articular process and superior articular process form what joint to help keep the vertebrae aligned? These processes also do what?
Zygapophyseal joint
Limit movement depending on angle of articular surface
Where is movement of the head performed?
C1 atlantooccipital joint + all other cervical joints
In general, the cervical is more ______.
mobile
The ____________ of the zygapophyseal joints of the cervical vertebrae allows ______________.
horizontal oriented articular surface
Flex/extension, ab/adduction, rotation
What are the identifying features of the cervical vertebrae?
- Transverse foramen
- Anterior and posterior tubercles
- grooves for spinal nerves
- uncinate process
- bifid spinous process
- vertebrae prominens
What goes through the cervical transverse foramen?
Vertebral arteries and veins
Where are the cervical anterior and posterior tubercles located?
On the transverse process
What are the muscle attachments for the anterior and posterior tubercles of the cervical vertebrae?
Scalenes and levator scapulae
The cervical tubercles together make up what?
Grooves for spinal nerves
What is the uncinate process and its function?
Elevated superior epiphyseal rim anterior and laterally (*not posterior) which allows for free flexion and extension but limits ab/adduction
The uncinate process forms what joint?
Uncovertebral joint
What is the bifid spinous process?
Forked portion of cervical spinous process at C3-C6 (*good for ID on practical)
Where is the vertebral prominens located?
Located on C7, long spinous process
C1 is known as?
Atlas, atlantooccipital joint
What does the atlas not have?
Vertebral body or spinous process
The atlas has what instead of a vertebral body?
Anterior arch
What on the lateral side of C1 contains superior and inferior articular processes? What does it do?
Lateral masses
Transmits weight from head to C2
C2 is known as?
Axis, atlantoaxial joint
Another name for the dens and its purpose.
Obontoid process
Projects superior and forms a pivot for the atlantoaxial joint around which the head rotates (no)
Purpose of the superior articular facets of the axis.
Transmits weight from lateral masses of C1 to body of C2.
What are the 4 feeds to the brain?
(2) carotid
(2) vertebral
How many thoracic vertebrae are there?
12
Which vertebrae have costal facets on their bodies to allow for a rib to articulate above and below?
T2-T9
These articulations of the ribs to the bodies of vertebae limit ________ and limit ________.
- Limit flex/extension
- Limit Ab/Adduction