Table 5.

The maximum and mean percentage overlap per linearly registered structure and age group

Structure	Young		Middle-aged		Elderly
	Maximum	Mean	Maximum	Mean	Maximum	Mean
STR
Left	100.00	42.94	100.00	47.01	100.00	46.82
Right	100.00	42.66	100.00	43.80	100.00	45.47
GPe
Left	100.00	26.79	100.00	30.88	100.00	35.41
Right	100.00	26.26	100.00	30.10	100.00	35.22
GPi
Left	100.00	22.09	99.14	26.52	100.00	23.89
Right	99.18	21.82	100.00	25.44	100.00	23.95
RN
Left	100.00	25.14	100.00	30.87	100.00	28.72
Right	100.00	25.22	100.00	28.37	95.90	28.00
STN
Left	65.09	9.11	49.27	8.53	61.14	14.24
Right	63.31	9.96	54.38	8.79	53.52	10.81
SN
Left	90.42	18.10	98.22	22.93	99.40	25.84
Right	78.02	16.70	89.57	20.89	88.89	22.59
PAG	95.31	19.91	99.83	24.48	93.34	21.62

STR striatum, GPe globus pallidus externa, GPi globus pallidus interna, RN red nucleus, STN subthalamic nucleus, SN substantia nigra, PAG periaqueductal grey