Structural Flashcards
(31 cards)
Sella Turcica
A-P normal range 5-16 mm
Average 11mm
S-I normal range 4-12 mm
Average 8mm
Sella Turcica Indicates
Indicates Space Occupying Lesion
ADI
Adult 1-3
Child 1-5
ADI Indicates
Instability of atlas/axis
Adult: Rheumatoid Arthritis
Child: Chronic Bacterial Infection
Georges Line
Posterior of Vertebral Bodies
Posterior Cervical Line
Line drawn at the Spinal-Laminar Junction
Basilar Angle
Normal Range 123-152
>152 Platybasia
McGregors Line
Drawn Sup/Post aspect hard plate to inferior most aspect of occiput
Chamberlains Line
> 3mm
*more indicates Platybasia
Macraes Line
Occipital bone extend across the foreman magnum
Platybasia
- Basilar Angle
- McGreggors Line
- Chamberlains Line
- McCraes Line
Cobb Lippman
0-20 Degrees-Observe Progression
20-40 Degrees-Bracing
>40 Degrees- Surgical Intervention
Risser/Ferguson
No Numbers
Remember has X’s through Vertebra
Cervical Lordosis
35-45 Degrees
40 Degree Avg
Thoracic Kyphosis
Angles vary by age
Angles increase with age
Angles increase more in females
Lumbar Lordosis
Normal Range 50-60 degrees
Average 55 degrees
Sacral Inclination
Normal Range 30-72 Degrees
Avg 46 Degrees
Lumbosacral angle
Normal Range 26-57
Average: 41 Degrees
Lumbosacral Disc Angle
10-15 Degrees
15 Facet Impaction
Ullmanns Line
If last lumbar crosses the perpendicular line Indicates Spondyloisthesis
Meyerdings Grading
Grade 1-4
Fergusons Weight
Line should not cross the anterior 1/3 of Sacral Base
Teardrop Distance
Normal Range 6-11 mm
Average: 9mm
>11mm Arthritis
Hip Joint Width
Superior
Axial: Double the amount
Medial: Same as Teardrop