Nash-Moe Grade (Vertebral Rotation)
The Nash-Moe method of grading vertebral rotation in scoliosis, by the position of the convex-side pedicle on the AP radiograph, grades 0-4.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Nash-Moe grade
- 2 - convex pedicle in the middle third
Result: Nash-Moe grade 2: the convex pedicle lies within the middle third of the vertebral body.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Grade 0
- Both pedicles symmetric; no rotation.
- Grade 1
- Convex pedicle slightly toward the midline; concave pedicle disappearing.
- Grade 2
- Convex pedicle in the middle third; concave pedicle no longer visible.
- Grade 3
- Convex pedicle in the central segment, near the midline.
- Grade 4
- Convex pedicle past the midline, onto the concave side.
What you enter
- Nash-Moe grade
How this is calculated
Nash CL Jr, Moe JH. A study of vertebral rotation. J Bone Joint Surg Am. 1969;51(2):223-229. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.