Case Report
Intermittent Alien Hand Syndrome and Callosal Apraxia in Multiple
Sclerosis: Implications for Interhemispheric Communication
Table 1
DA performance on neuropsychological testing (the star indicates scores below cutoffs).
| Cognitive functions | NPSYCH tests | Raw score (corrected) | Range | Cutoff scores |
| Language | Naming | 30 | 0–30 | | Fluency by phoneme | 33 | — | ≤17.35 | Fluency by category | 42 | — | ≤24 |
| Short-term and working memory | Visual span | | | | -Corsi test | 4 (3.50)* | 0–10 | ≤3.75 | Digit span | | | | (i) Forward | 6 (5.75) | 0–10 | ≤3.75 | (ii) Backward | 4 | 0–10 | |
| Long-term memory | | | | | (i) Verbal LTM | List of words | | | | (i) Immediate recall | 49 (46.3) | 0–80 | ≤25.14 | (ii) Delayed recall | 12 (11.2) | 0–16 | ≤3.44 | (ii) Visual LTM | Story recall | 9.7 (8.95) | 0–16 | ≤4.50 | Delayed recall of Rey’s figure | 13 (13.25) | 0–36 | ≤9.46 |
| Attention and information processing | Trail making test (TMT) | | | | (i) Part A | 93′′ (83) | — | ≥94 | (ii) Part B | 148′′ (111) | — | ≥282 | Symbol digit modalities test | | | | -Oral form | 21* | 0–100 | |
| Executive functions | Raven’s CPM | 33 (30.8) | 0–36 | ≤18.96 | London tower | 28 | 0–36 | | Modified card sorting test | | | | (i) Categories | 6 | 0–6 | ≤2 | (ii) Perseverative errors | 1 (1) | — | ≥6.41 | Cognitive estimates | | | | (i) Errors | 19* | 0–42 | ≥18 | (ii) Bizarre errors | 4* | 0–21 | ≥4 |
| Praxis | Figure copying | 9 (9.1) | 0–12 | ≤7.18 | Rey-Osterrieth complex figure | 31 (30.25) | 0–36 | ≤28.87 | Clock test | 9 | 0–10 | ≤7 |
| Visual processing | Minimal feature view task | 25 | 0–25 | |
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