The Spine Flashcards
What are the different sections of the vertebral column?
- Cervical
- Thoracic
- Lumbar
- Sacral
- Coccyx
How many vertebrae are in each section of the spinal column?
- 7 Cervical
- 12 Thoracic
- 5 Lumbar
- 5 Sacral (Fused)
- 3-5 Coccyx (Fused)
How many curves are there in the spine and how are they categorised?
4; 2 Primary and 2 Secondary
What are the 2 Primary curves of the spine?
Thoracic and Sacro-coccygeal
What are the two secondary curves of the spine?
Cervical and Lumbar
What is another word used to describe the curve of the cervical and lumbar spines?
Lordotic/Lordosis
What is another word used to describe the curve of the thoracic spine?
Kyphotic/Kyphosis
How can the C3-7 Vertebrae be identified?
Oval body, short spinous processes and large foramen, with foramen in the transverse processes
How can C1 (atlas) be identified?
No body or spinous process
How can C2 (axis) be identified?
The ‘dens’; a process that projects superior from the spine body
Apart from other vertebrae what do thoracic vertebrae articulate with?
The ribs
How can the thoracic vertebrae be identified?
Heart shaped body, circular foramen, long spinous processes and transverse processes
What does the structure of the thoracic vertebrae suggest about its function?
articular facets limit flexion and extension but allow for rotation
What does the structure of the Lumbar vertebrae suggest about its function?
Large body suggests load bearing function. Only allows flexion and extension due to orientation of articular facets
How can the lumbar vertebrae be identified?
Short thick pedicles and laminae, flat short spinous processes and triangular foramen
What are the three basic components of vertebrae and their functions?
- Body: load bearing
- Arch: Spinal cord protection
- Processes: attachment for muscles
What are the two types of intervertebral joints?
- Vertebral body articulation
- Vertebral facet articulations
What are vertebral body articulations
Symphysis joint between two vertebral bodies and a fibrocartilaginous intervertebral disc
What are vertebral facet articulations?
Non axial diarthrodial joints. Movement determined largely by orientation of articular facets
What is the intervertebral disc made up of?
Annulus Fibrosis and Nucleus Pulposus
What is the annulus fibrosis
Outer fibrosis ring of the spinal disc
What is the nucleus pulposus?
Inner ball of firmly compressed elastic material
How much does water make up intervertebral discs?
80-90%