Fryette Mechanics

Question 1

18) A 33-year-old woman suffers a trauma to her lumbar spine. The trauma occurs while her spine is in an extended position. Which of the following dysfunctions would she most likely have?

Answer 1

Extended ( Rot x SB x)

Question 2

A 30-year-old man presents to your office with a lumbar segmental dysfunction. L5 is ERLSL. In which direction is L5’s motion restricted?

Answer 2

Flexion, Rotation Right, SB right

Question 3

A 27-year-old woman presents to your office with neck pain. Segmental motion testing reveals a dysfunction of C4. C4 moves most easily when translated from left to right. Testing this same motion in the flexed or extended positions makes the motion more symmetric. Which of the following dysfunctions does this patient have?

Answer 3

C4 - NRSL

Question 4

A 24-year-old man presents to your office with low back pain. You discover a Type I dysfunction extending from L1 to L5. Motion has occurred to the right around an anteroposterior axis within the coronal plane. In which direction has motion around a vertical axis within the transverse plane occurred?

Answer 4

Left

Question 5

Right rotation of C-1 occurs in which of the following planes?

Answer 5

Horizontal

Question 6

rotation occurs in what axis?

Answer 6

Vertical axis/transverse plane

Question 7

Sidebending occurs in what axis?

Answer 7

AP/coronal plane

Question 8

What Segmental Motion occurs in a sagittal plane about a trans

Answer 8

sagittal plane/transverse axis

Question 9

what plane and axis does extension act on?

Answer 9

sagittal plane and transverse axis

Question 10

Fryette mechanics apply only to ____ and ______ but not to the _______

Answer 10

lumbar and thoracic but not the neck

Question 11

Fryette’s 3rd law is?

Answer 11

III – Initiating motion of a vertebral segment in any plane of motion will modify the movement of that segment in other planes of motion

Question 12

Review over the neck

Answer 12

Motion is controlled by the shape of the bone, particularly the articular facets.
Occiput on C-1
Always follows Type I Like Mechanics
C-1 on C-2
Considered to Only Rotate, all other motions are negligible
C2 to C6
Always follows Type II Like Mechanics
C7
Tends to Follow Classical Fryette Mechanics

Question 13

Exception to the rules of fryer are (4yk)

Answer 13

Trauma, DDD, congenital abnormalities, and Facet tropism.