Table 2.
Neuroimaging measurements.
| ACTS | AC | TS | NC | |
|---|---|---|---|---|
| Protrusion right tonsilla (mm) | 4.8 (±1.3) | 5.9 (±2) | not applicable | not applicable |
| Protrusion left tonsilla (mm) | 4.5 (±2.6.) | 5.8 (±2.5) | not applicable | not applicable |
| Upper posterior cranial fossa area | 1129.6 (±193.4) | 1099.2 (±128.9) | 1197.2 (±231.6) | 1142.9 (±159.9) |
| Lower posterior cranial fossa area | 1971.5 (±305) | 1717.7 (±557.8) | 1982.6 (±257) | 1997.8 (±431.4) |
| Total posterior cranial fossa area | 3101.1 (±323.3) | 2738.7 (±487.7) | 3265.6 (±288.7) | 3362.7 (±274.2) |
| Basal angle | 135.2 (±4.1) | 136.4 (±2.7) | 131.7 (±6) | 131.7 (±6) |
| Boogaard angle | 118.7 (±7.4) | 124.7 (±6.3) | 120.3 (±,7) | 118.1 (±4.7) |
| Occipital angle | 137.5 (±7.2) | 132.3 (±7.4) | 137.1 (±8.8) | 137.2 (±7.8) |
| Tentorial angle | 77.7 (±6.8) | 79.8 (±10.8) | 82.5 (±8.2) | 83.9 (±8.4) |
Standard deviation is shown between parenthesis. ACTS, Arnold Chiari + Tourette Syndrome; AC, Arnold Chiari.