Vertebral Column Flashcards
How many bones make up the vertebral column?
26
How many true (movable) vertebrae are there?
24
How many total vertebrae are there?
33
How many regions are there in the vertebral column?
5
How many vertebrae are in the cervical region?
7
How many vertebrae is in the thoracic region?
12
How many vertebrae are in the lumbar region?
5
How many vertebrae are in the sacral region?
5
How many vertebrae are in the coccygeal region?
4
What are the four curvatures of the spine?
•Cervical curvature
•Thoracic curvature
•Lumbar curvature
•Sacral curvature
What are the primary curves?
•Thoracic curve
•Sacral curve
What are the secondary curves?
•Cervical curve
•Lumbar curve
What is the anterior, cylindrical weight bearing portion of a vertebra?
Body
What two lateral structures of a vertebra form the pillars of the passageway for the spinal cord?
Pedicles
On a vertebra what structures extend from the lateral pillars to the midline?
Laminae
Together the posteriorly projecting pillars and the extensions to the midline form what structure?
Vertebral arch
Together the posteriorly projecting pillars and the extensions to the midline form what passageway within a vertebra?
Vertebral foramen
The vertebrae form what collective passageway for the spinal cord?
Vertebral canal
Adjacent vertebrae form what passageways for spinal nerves?
Intervertebral foramina
What posteriorly projecting structures of the vertebrae can be palpated?
Spinous processes
What lateral projections occur on each vertebra?
Transverse processes
What processes of a vertebra form synovial joints with the vertebrae immediately superior and inferior it?
Superior and inferior articular processes
What smooth, flat, articular surfaces occur on a vertebra?
Articular facets
What are the pads of fibrocartilage between vertebrae?
Intervertebral discs
What is the outer ring of fibrocartilage within an intervertebral disc?
Anulus fibrosus
What is the inner, circular region of an intervertebral disc?
Nucleus pulposus
What forms the top and bottom, portions of an intervertebral disc?
Cartilaginous end plate
What structures separate the bodies of the vertebrate from C2-C3 to L5-S1
Intervertebral discs
What are the three components of an intervertebral disc?
•Anulus fibrosus
•Nucleus pulposus
•Cartilaginous end plate
Synovial joints occur between what parts of vertebrae from C2 to L5-S1
Superior and inferior articular processes
What supporting ligament appears on the anterior of the vertebral body?
Anterior longitudinal ligament
What supporting ligament appears on the posterior vertebral body?
Posterior longitudinal ligament
What ligament is found only in the cervical spine and supports the skull by resisting flexion?
Ligamentum nuchae
What is the relative size of the cervical vertebrae?
Small
What is the shape of the spinous processes of C1-C6?
Bifid
What openings in the cervical vertebrae allow the passage of the vertebral arteries and veins?
Transverse foramina
What is another anatomical term for C1?
Atlas
What structures does C1 lack?
•Body
•Spinous process
What is another anatomical term for C2?
Axis
During development the body of C1 fuses to C2 to form what structure?
Dens
What is another anatomical term for the spinous process of C7?
Vertebra prominens
What is the general shape of the bodies of T1-T12?
Heart shape
What is a distinguishing characteristic of many of the thoracic vertebrae?
The spinous process is long and pointed and in some angled sharply inferiorly
Thoracic vertebrae can be distinguished from all other vertebrae by what features?
Costal facets and Demi facets
What is the general shape of the bodies of lumbar vertebrae?
Large, round, or oval
What is the characteristic of the spinous processes of the lumbar vertebrae?
•Thick blunt
•Project posteriorly
What is the anatomical term for the anterior, superior bulge of the sacrum?
Sacral promontory
What paired openings occur on the anterior surface of the sacrum?
Anterior sacral formina
What are the paired openings on the posterior side of the sacrum?
Posterior sacral foramina
The spinous process of the sacrum form what structure?
Median sacral crest
What lateral structures of the sacrum articulate with the ossa coxae?
Auricular surface
What is the anatomical term for the tailbone?
Coccyx