Sphenobasilar Synchondrosis Dysfunction

Question 1

About which axis do SBS torsions rotate?

Answer 1

A-P axis

Question 2

Torsions occur along an ________ axis with the sphenoid and occiput rotation in ________ directions.

Answer 2

A-P, opposite

Question 3

Which of the following is a non-physiologic SBS strain?

Left torsion
Right lateral strain
Left side-bending and rotation
Flexion
Extension

Answer 3

Right lateral strain

Question 4

In side-bending and rotation, the occiput and sphenoid rotate in ________ directions around ________ axes. However, the occiput and sphenoid rotate in the same direction around ________ axes.

Answer 4

Opposite, parallel vertical, A-P

Question 5

Torsions are named for the greater wing of the sphenoid that is ________.

Answer 5

Superior

Question 6

The physiologic strains are ________, ________, and ________.

Answer 6

Flexion/extension, torsions, side-bending and rotation

Question 7

What axes and direction of motion are involved in a patient with a lateral SBS strain?

Answer 7

Vertical - same direction

Question 8

During cranial flexion, the temporal bone ________ along an axis along the petrous portion.

Answer 8

Externally rotates

Question 9

In vertical strains, the sphenoid and occiput rotate in the same direction around their own ________ axes.

Answer 9

Transverse

Question 10

A head with a flexion dysfunction will have an increased ________ and a decreased ________.

Answer 10

Width, length (Ernie shaped head)

Question 11

During cranial flexion, the occiput rotates about a ________ axis. The basilar part and condyles move _______ and ________ while the squamous portion moves ________ and ________.

Answer 11

Transverse, anteriorly, superiorly, posteriorly, slightly laterally

Question 12

Non-physiologic dysfunctions are typically associated with ________.

Answer 12

Trauma

Question 13

Describe what your hands will feel when palpating a patient’s head with a right SBS torsion.

Answer 13

Right index finger will be higher

Question 14

Cranial motion patterns are described around the reference point known as the ________.

Answer 14

Sphenobasilar synchondrosis (SBS)

Question 15

SBS side-bending and rotation strain involves three axes. One is a vertical axis through the foramen magnum. Another is an A-P axis through the cranial vault. What is the third axis?

Answer 15

A vertical axis through the body of the sphenoid

Question 16

What axes do the sphenoid and occiput rotate about in vertical strains?

Answer 16

Transverse

Question 17

The manifestation of the primary respiratory mechanism in the head is called the ________.

Answer 17

Cranial rhythmic impulse

Question 18

Side-bending and rotation are named for the side of the ________.

Answer 18

Convexity

Question 19

Vertical strains are named according to the position of the basilar process of the ________.

Answer 19

Sphenoid (basisphenoid relative to the basiocciput)

Question 20

Lateral strains are named for the direction the ________ shifts.

Answer 20

Basisphenoid

Question 21

A parallelogram shaped head in an infant refers to a ________ strain.

Answer 21

Lateral

Question 22

During cranial flexion, the sphenoid rotates about a ________ axis. The greater wings move ________, ________ and ________.

Answer 22

Transverse, anteriorly, inferiorly, slightly laterally

Question 23

In a SBS torsion strain, the sphenoid and occiput rotate in the same direction.

True or False?

Answer 23

False

Question 24

During cranial flexion, the parietal bones move ________.

Answer 24

Laterally

Question 25

A head with an extension dysfunction will have an increased ________ and a decreased ________.

Answer 25

Length, width (Bert head)

Question 26

How is side-bending and rotation SBS strain pattern named?

Answer 26

For the side of the convexity

Question 27

Lateral strains can be felt by the ________ fingers moving left or right.

Answer 27

Little

Question 28

When the sphenoid and occiput are forced together, it is called ________.

Answer 28

Compression

Question 29

The cranial vault hold consists of placing the four fingers in specific locations on each side of the skull. These locations are as follows: Index fingers —> ________ Long finger —> ________ Ring finger —> ________ Little finger —> ________

Answer 29

Greater wing of the sphenoid Temporal bone anterior to ear Temporal bone posterior to ear Occiput

Question 30

In lateral strains, the sphenoid and occiput rotate in the same direction around two parallel ________ axes.

Answer 30

Vertical