Anatomy: Back Flashcards
Vertebral Column:
What are the functions of the vertebral column?
How many vertebrae are there?
Give the divisions
Vertebral Column:
Functions of the vertebral column: axis, support, movement, protect the CNS
33 vertebrae in total
7 cervical
12 thoracic
5 lumbar
5 sacral
4 coccyx
What is the C1 vertebrae also called
C2 vertebrae also called
C1: ATLAS (remember it holds up the world)
C2: axis
The vertebrae are derived from ______
What are dermatomes?
The vertebrae are derived from somites
Dermatomes are the skin innervated by one spinal nerve
What are the primary curvatures?
What are the secondary curvatures?
Primary curvatures are called kyphosis (sacral and thoracic) you are born with these
Secondary curvatures are called lordosis (cervical and lumbar) you develop these as you develop
Describe the following abnormal curvatures of the spine:
Excessive kyphosis
Excessive lordosis
Scoliosis
Excessive kyphosis: hunchback
Excessive lordosis: sway back
Scoliosis: abnormal lateral curvature
Common features of the typical vertebrae:
The vetebral body is anterior/posterior
The veterbral arch is anterior/posterior
The vertebral body is anterior
The vertebral arch is posterior
Label the parts on a typical vertebrae
Down the line:
- Spinous process
- Transverse process
- Articular process
- Lamina pedicule
- Vertebral body
The open space is the vertebral foramen
Parts of the vertebrae:
Describe the pedicle
Describe the transverse processes
The pedicle is the part of the vertebral arch that attach the transverse processes to the body
Transverse process: lateral extensions from the union of the pedicle and the lamina
Parts of the vertebrae:
Explain the lamina
Explain the spinous process
Lamina: paired portions of the vertebral arch that connect the transverse process to the spinous process
Spinous process: an projection that extends posterioly by the union of the two lamina
What are the articular processes?
Articular processes are two superior and two inferior facets for articulation with adjacent vertebrae
Describe the vertebral foramen.
The vertebral foramen is a canal formed by the vertebral arch that contains the spinal cord, meningeal coverings, and blood vessels supplying the spinal cord
Common features of Cervical Vertebrae:
_____ size
______ body (shape)
_______ spinous process
large ________ foramen (shape)
They have an opening called the _______ where the vertebral artery snakes through
Cervical Vertebrae:
small size
rectangular body
bifid spinous process
large triangular foramen
They have an opening called foramen transversarium where the vertebral artery snakes through
The vertebral artery ascends through the ________
That artery branches off the ______ artery
The vertebral artery enters the vertebral column at _______ (which vertebrae)
The vertebral artery ascends through the FORAMEN TRANSVERSARIUM
it branches off the subclavian artery
The vertebral artery enters at C6
Thoracic Vertebrae:
____ shaped body
long spine directed ______
costal facets for ribs
small oval _______
Thoracic Vertebrae:
heart shaped body
long spine directed inferiorly
costal facets for rubs
small oval vertebral foramen
Lumbar vetebrae:
_____ shaped body
short _____ shaped spinous process
Lumbar vertebrae:
kidney shaped body
short hatchet shaped spinous process
Of all the vertebrae divisions:
Which kind has the greatest range of motion?
Which kind has the least range of motion?
Greatest Range of Motion: cervical vertebrae
Least range of motion: thoracic vertebrae
Explain the structural differences amoung the three types of vertebrae: cervical, thoracic, lumbar
Body shape
Spinous process
Vertebral formamen shape
transverse process
movement
Atypical Cervical Vertebrae:
Explain how the following cervical vertebrae are different:
C1
C2
C7
C1 (ATLAS): has no body, just an anterior and posterior arch with a FACET for the dens from c2
C2( AXIS): has a body, but has a DENS (peg on top)
C7: long spinous process that you can feel in your neck
What is the sacroiliac joint?
The sacroiliac joint is where the sacrum and pelvis meet
Very important joint because a lot of body weight it on this joint
What is an intervertebral disc?
What is the inner and outer layer of the intervertebral disc
An intervertebral disc:
Is a cartilaginous symphysis joint that acts as a shock absorber in between vertebrae
Inner layer of the intervertebral disc: nucleus populsus
Outer layer of the intervertebral disc: annulus fibrosis