Glutamate-Mediated Primary Somatosensory Cortex Excitability Correlated with Circulating Copper and Ceruloplasmin

Table 2

M20 and M30 ECD positions and strengths.

	x [mm]	y [mm]	z [mm]	𝑠[nA⋅m]
M20	−42	−13	69	17.6
ECD	(10)	(11)	(13)	(9.3)
M30	−38	−12	71	21.5
ECD	(9)	(9)	(10)	(16.3)

Mean (standard deviation) position (𝑥,𝑦,𝑎𝑛𝑑𝑧) and strength (𝑠) of left M20 and M30 ECDs. Coordinate system is defined on the basis of anatomical landmarks so that central axis passes through the midline between the two hemispheres, the positive 𝑦-axis passes through the nasion and the midpoint between the two preauricular points, and the positive 𝑧-axis passes through the vertex perpendicular to 𝑦-axes; thus, the positive 𝑥-axis is rightward.