Trunk Structure + Function QUIZ

Question 1

during axila loading on the spinal column

-the annulus becomes slack due to decreased disc height
-this is motion around an axis
-the zygapophysial joints are the primary weight bearing structures
-the annulus becomes taut, increasing stability of the motion segment

Answer 1

the annulus becomes taut, increasing stability of the motion segment

Question 2

the fibers in the annulus fibrosis are most at risk for injury during

-compressive loading
-lateral shearing of the vertebral bodies
-torsion + flexion
-distraction of the vertebrae

Answer 2

torsion + flexion

Question 3

intradiscal pressure is lowest when a person is

-sitting
-standing
-doing back arches
-doing sit ups

Answer 3

standing

Question 4

during forward flexion of the lumbar spine, all of the following are subjected to tensile (stretching) stresses EXCEPT

-posterior longitudinal ligament
-dura mata in the spinal cord
-psoas major
-posterior portion of the annulus fibrosis

Answer 4

psoas major

Question 5

on examination you note that the patient is experiencing a sensory loss over their left thumb + index finger implicating the C6 nerve root. the place for you to find this nerve is

-C4-5 motion segment
-C5-6 motion segment
-C6-7 motion segment
-C7-T1 motion segment

Answer 5

C5-6 motion segment

-c-spine: exit above vertebra (C6 exits between C5-6)
-t-spine: below (T1 exits between T1-2)
-l-spine: below

Question 6

when considering close-chain motions of the trunk, which of the following would you expect to see?

-lumbar extension + hip extension during anterior pelvic tilt
-lumbar flexion + hip extension during anterior pelvic tilt
-lumbar extension + hip extension during posterior pelvic tilt
-lumbar flexion + hip extension during posterior pelvic tilt

Answer 6

lumbar flexion + hip extension during posterior pelvic tilt