Table 5.

Functional neuroimaging results from the session (retest ‐ training) by age condition (Young vs. Older) interaction for clusters of voxels correlated with sleep spindle density, duration, amplitude and frequency in the young nap (YN) and older nap (ON) groups

Hemisphere	Region	Subregion	cluster	X	Y	Z	z	P
Retest‐Training Session: Effect of Age
1. Regression: spindle density (YN‐ON)
Right	Striatum	Putamen	76	24	18	−8	4.39	0.000
Left	Parietal	Superior	56	−22	−48	72	4.14	0.000
Left	Thalamus		11	−4	−8	−2	3.67	0.000
Right	Insula		3	28	18	−12	3.62	0.000
Left	Temporal	Inferior	3	−56	−10	−30	3.47	0.000
Left	Temporal	Inferior	4	−50	−14	−30	3.40	0.000
Right	Thalamus		4	6	−8	−2	3.33	0.000
Left	Cerebellum	VI	1	−22	−52	−30	3.32	0.000
Left	Cerebellum	Crus II	10	−42	−70	−48	3.28	0.001
Left	Temporal	Inferior	4	−46	−10	−26	3.28	0.001
Right	Temporal	Inferior	1	42	−42	−14	3.21	0.001
Left	Temporal	Superior Pole	2	−36	12	−24	3.18	0.001
Left	Temporal	Inferior	2	−48	8	−40	3.18	0.001
Left	Parietal	Somatosensory	3	−20	−30	74	3.15	0.001
Left	Cerebellum	VIIb	1	−28	−66	−52	3.10	0.001
2. Regression: spindle density (ON‐YN)
Right	Cerebellum	Crus I	32	42	−74	−26	3.64	0.000
Right	Cerebellum	VI	11	24	−68	−16	3.46	0.000
Right	Cerebellum	VI	10	14	−80	−18	3.30	0.000
Right	Frontal	Primary Motor Cortex	1	56	−10	50	3.26	0.001
Right	Parietal	Calcarine	2	30	−58	6	3.21	0.001
Right	Cerebellum	Crus I	1	34	−76	−20	3.10	0.001
3. Regression: spindle duration (YN‐ON)
No significant voxels
4. Regression: spindle duration (ON‐YN)
Left	Parietal	Postcentral	5	−22	−44	54	3.31	0.000
Right	Occipital	Calcarine	3	28	−64	12	3.21	0.001
Right	Cerebellum	VIIIb	2	26	−50	−48	3.14	0.001
Right	Cerebellum	VIIb	1	38	−48	−50	3.11	0.001
5. Regression: spindle amplitude (YN‐ON)
No significant voxels
6. Regression: spindle amplitude (ON‐YN)
No significant voxels
7. Regression: spindle frequency (YN‐ON)
No significant voxels
8. Regression: spindle frequency (ON‐YN)
No significant voxels

Note: Statistics thresholded at P < 0.001 (unc.).