Table 2.

The mean and standard deviation of the $T_1$ values in ms per structure and age group

Structure	Young		Middle-aged		Elderly
	Mean	SD	Mean	SD	Mean	SD
STR
Left	1643.71	39.53	1703.71	71.78	1721.40	62.53
Right	1723.51	41.30	1762.79	70.91	1774.38	73.01
Overall	1683.61	56.79	1733.25	76.20	1747.01	71.35
GPe
Left	1245.14	28.61	1287.44	48.81	1328.26	64.87
Right	1277.72	30.54	1304.99	45.35	1344.61	63.03
Overall	1261.43	33.62	1296.22	47.09	1336.44	62.61
GPi
Left	1223.43	32.29	1279.28	48.88	1310.55	56.11
Right	1241.45	31.76	1284.55	41.49	1316.10	55.39
Overall	1232.44	33.03	1281.91	44.57	1313.33	54.16
RN
Left	1235.49	38.80	1296.25	61.35	1319.50	30.74
Right	1225.58	34.18	1291.36	55.81	1315.22	30.16
Overall	1230.54	36.60	1293.80	57.60	1317.36	29.62
STN
Left	1182.41	36.77	1215.14	74.46	1238.13	49.13
Right	1202.12	39.10	1228.43	74.75	1292.45	39.81
Overall	1192.26	38.92	1221.79	73.52	1265.29	51.61
SN
Left	1303.52	43.87	1338.69	55.87	1337.68	48.30
Right	1326.41	40.16	1353.00	68.91	1355.96	48.97
Overall	1314.97	43.27	1345.84	61.98	1346.82	48.12
PAG	1750.91	74.30	1907.00	84.29	1952.60	47.68

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