Quiz on Biomechanics of Intervertebral Discs

What type of joint is classified as a cartilaginous synarthrosis?

• Synovial joint

• Intervertebral joint

• Fibrous joint

• Ball-and-socket joint

How many interbody joints are there in the spinal column?

• 23

• 26

• 20

• 30

What is the primary function of the intervertebral discs?

• Support muscle attachment

• Act as shock absorbers

• Store nutrients

• Facilitate blood flow

What is the central part of the intervertebral disc called?

• Vertebral endplate

• Nucleus pulposus

• Annulus fibrosus

• Spinal canal

Which component of the intervertebral disc is responsible for resisting compression?

• Endplate

• Vertebral body

• Nucleus pulposus

• Annulus fibrosus

What percentage of water does the nucleus pulposus contain in youth?

• 70% to 90%

• 90% to 100%

• 60% to 70%

• 50% to 60%

What is the orientation of collagen rings in the annulus fibrosus?

• 65 degrees from vertical

• 45 degrees from vertical

• 25 degrees from horizontal

• 90 degrees from horizontal

What happens to the intervertebral disc when subjected to axial compression?

• It rotates

• It expands

• It flattens

• It thickens

What is the role of the vertebral endplates?

• Facilitate movement

• Prevent herniation

• Support muscle attachment

• Store nutrients

What is the effect of bending on the intervertebral disc?

• Increased tensile force anteriorly

• Decreased compressive force posteriorly

• No effect on the disc

• Increased shear force laterally