Table 2. Significant correlations between the SWJ rate and areas with reduced brain volumes in PSP and PD patients.

	SWJ recording condition	Side	Area	MNI			Cluster size	t
				x	y	z
PSP	Target on	Left	Middle temporal gyrus	−56	−42	3	47	13.29
		Left	Inferior temporal gyrus	−65	−33	−24	30	8.39
	Target off	Right	Inferior temporal gyrus	59	−30	−21	20	10.44
		Left	Superior temporal gyrus	−59	3	−5	35	10.03
		Right	Superior occipital gyrus	30	−81	23	17	8.29
PD	Target on	Left	Putamen/pallidum	−11	3	−5	62	9.90
		Right	Pallidum	21	0	3	27	7.93
	Target off		No significant correlations

p<0.001.

MNI: coordinates according to the Montreal Neurological Institute brain atlas, PD: Parkinson's disease, PSP: progressive supranuclear palsy, SWJ: square-wave jerk.