Table 1.
Summary of group effects tested using a piecewise linear mixed‐effects model in 19 patients and 19 age‐matched controls (initial sample)
| Visual | Motor | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Effect | Df | Est. | SE | χ2 | P‐value | Est. | SE | χ2 | P‐value |
| 20‐s CBF increase (%) | |||||||||
| Group (global) | 6 | / | / | 16.59 | 0.0109 | / | / | 11.46 | 0.0753 |
| Group: Age | 1 | −1.546 | 1.302 | 1.384 | 0.2395 | −1.113 | 0.993 | 1.234 | 0.2666 |
| Group: Sequence | 1 | 0.257 | 0.846 | 0.092 | 0.7614 | 0.837 | 0.793 | 1.116 | 0.2908 |
| Group: Dynamics | 3 | / | / | 14.09 | 0.0028 | / | / | 5.746 | 0.1246 |
| 40‐s CBF increase (%) | |||||||||
| Group (global) | 10 | / | / | 30.41 | 0.0007 | / | / | 46.87 | 1E‐06 |
| Group: Age | 1 | −1.572 | 1.323 | 1.385 | 0.2393 | −1.222 | 1.034 | 1.37 | 0.2419 |
| Group: Sequence | 1 | 0.812 | 0.496 | 2.68 | 0.1016 | 1.665 | 0.508 | 10.71 | 0.0011 |
| Group: Dynamics | 7 | / | / | 25.08 | 0.0007 | / | / | 29.33 | 0.0001 |
| 20‐s P100 amplitude (μV) | |||||||||
| Group (global) | 7 | / | / | 5.924 | 0.5486 | ||||
| Group: Age | 1 | −0.087 | 0.097 | 0.804 | 0.37 | ||||
| Group: Sequence | 1 | 0.15 | 0.233 | 0.41 | 0.5217 | ||||
| Group: Dynamics | 4 | / | / | 4.614 | 0.3292 | ||||
| 40‐s P100 amplitude (μV) | |||||||||
| Group (global) | 11 | / | / | 3.882 | 0.9733 | ||||
| Group: Age | 1 | −0.037 | 0.065 | 0.325 | 0.5688 | ||||
| Group: Sequence | 1 | −0.002 | 0.084 | 4E‐04 | 0.9848 | ||||
| Group: Dynamics | 8 | / | / | 3.421 | 0.9052 | ||||
CBF variations measured during 20‐ and 40‐sec activations of the visual and sensorimotor cortex were tested. P100 amplitude in the visual cortex in response to 20‐ and 40‐sec visual stimulations were also tested. Df, degree of freedom. Estimated values (Est.) are only provided for effects related to a single parameter (i.e., Df = 1). Red values indicate P‐values less than 5% based on likelihood ratio tests.