Column Stability and Mobility Relationship Quiz

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A column with 3 flexible curvatures has a resistance of R=10.

False

Normal curvatures of the spinal column have an index of 95% within the normal limits of 94-96.

True

Exaggerated curvatures (dynamic type) have a Delmas index higher than 94%.

False

Attenuated curvatures (static type) have an index greater than 96%.

True Signup and view all the answers

The intervertebral disk is composed of a central portion called the annulus fibrosus.

False Signup and view all the answers

Water and proteoglycans concentrations are highest in the annulus fibrosus of the intervertebral disk.

False Signup and view all the answers

Collagen concentrations are highest in the annulus fibrosus of the intervertebral disk.

True Signup and view all the answers

The collagen fibers of the annulus are arranged in parallel sheets called lamellae.

False Signup and view all the answers

The collagen fibers in the intervertebral disk run nearly vertically to effectively resist sliding forces.

False Signup and view all the answers

Distraction forces are components of horizontal plane movements.

False Signup and view all the answers

The greater the ratio between disk thickness and height of the vertebral body, the lower the mobility of the segment.

False Signup and view all the answers

The nucleus position in the intervertebral disc should be closer to the periphery for better shock-absorbing capabilities.

False Signup and view all the answers

Compression force raises hydrostatic pressure in the nucleus pulposus of the intervertebral disk.

True Signup and view all the answers

Increasing nuclear pressure inhibits radial expansion of the annulus fibrosus in the intervertebral disk.

True Signup and view all the answers

Torsional forces in the intervertebral disk only affect fibers oriented in the direction of twist, leaving fibers in other layers unaffected.

False Signup and view all the answers

Shear forces in the intervertebral disk are produced during vertical separation.

False Signup and view all the answers

The pressure within the nucleus reinforces the peripheral annulus fibrosus.

True Signup and view all the answers

Pressure in the Nucleus Pulposus disc is lower when bending forward while holding a load.

False Signup and view all the answers

Lifting a load with the knees flexed places more pressure on the lumbar disc than lifting with straight knees.

False Signup and view all the answers

Horizontal facet surfaces in apophyseal joints favor lateral flexion.

False Signup and view all the answers

Sitting in an erect position produces greater disc pressure than sitting forward-slouched.

False Signup and view all the answers

Each apophyseal joint is formed by the articulation between opposing facet surfaces.

True Signup and view all the answers

Most apophyseal joint surfaces are oriented either horizontal or vertical.

False Signup and view all the answers

Shapes of the vertebrae do not influence the predominant motion at each spinal region.

False Signup and view all the answers

The attachment of ribs or ligaments has no effect on spinal motion.

False Signup and view all the answers

Local muscle actions do not impact the motion at different regions of the vertebral column.

False Signup and view all the answers

Column Stability and Mobility Relationship Quiz

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Questions and Answers

A column with 3 flexible curvatures has a resistance of R=10.

Normal curvatures of the spinal column have an index of 95% within the normal limits of 94-96.

Exaggerated curvatures (dynamic type) have a Delmas index higher than 94%.

Attenuated curvatures (static type) have an index greater than 96%.

The intervertebral disk is composed of a central portion called the annulus fibrosus.

Water and proteoglycans concentrations are highest in the annulus fibrosus of the intervertebral disk.

Collagen concentrations are highest in the annulus fibrosus of the intervertebral disk.

The collagen fibers of the annulus are arranged in parallel sheets called lamellae.

The collagen fibers in the intervertebral disk run nearly vertically to effectively resist sliding forces.

Distraction forces are components of horizontal plane movements.

The greater the ratio between disk thickness and height of the vertebral body, the lower the mobility of the segment.

The nucleus position in the intervertebral disc should be closer to the periphery for better shock-absorbing capabilities.

Compression force raises hydrostatic pressure in the nucleus pulposus of the intervertebral disk.

Increasing nuclear pressure inhibits radial expansion of the annulus fibrosus in the intervertebral disk.

Torsional forces in the intervertebral disk only affect fibers oriented in the direction of twist, leaving fibers in other layers unaffected.

Shear forces in the intervertebral disk are produced during vertical separation.

The pressure within the nucleus reinforces the peripheral annulus fibrosus.

Pressure in the Nucleus Pulposus disc is lower when bending forward while holding a load.

Lifting a load with the knees flexed places more pressure on the lumbar disc than lifting with straight knees.

Horizontal facet surfaces in apophyseal joints favor lateral flexion.

Sitting in an erect position produces greater disc pressure than sitting forward-slouched.

Each apophyseal joint is formed by the articulation between opposing facet surfaces.

Most apophyseal joint surfaces are oriented either horizontal or vertical.

Shapes of the vertebrae do not influence the predominant motion at each spinal region.

The attachment of ribs or ligaments has no effect on spinal motion.

Local muscle actions do not impact the motion at different regions of the vertebral column.

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