The coil orientation dependency of the electric field induced by TMS for M1 and other brain areas

Table 3 Mean electric field values for standard and optimal coil orientation

Location	Mean electric field strength [V m ⁻¹ ]
Location	Ē _standard	Ē _optimal *(% standard)*	Ē _⊥ _standard	Ē _⊥ _optimal *(% standard)*
MR	80.3	98.3 (122)	74.9	76.1 (102)
PMR	131.5	138.0 (105)	119.0	138.7 (117)
PFR	111.7	112.4 (101)	83.8	84.9 (101)
PFL	123.7	127.3 (100)	76.2	76.7 (100)
PML	107.7	114.3 (106)	40.6	73.6 (181)
IL	106.5	115.7 (109)	52.9	52.9 (100)
OL	100.6	102.9 (102)	65.0	66.6 (102)
SM2	86.7	109.7 (127)	64.9	64.9 (100)
SM1	74.4	89.8 (121)	54.2	55.7 (103)
OR	80.2	87.0 (108)	64.3	66.6 (104)
OM	98.9	99.2 (100)	51.4	51.4 (100)
CL	68.6	71.2 (104)	4.9	18.7 (382)
CR	81.8	82.2 (100)	−7.2	9.3 (−129)
CM	88.4	89.8 (101)	42.7	45.0 (105)

The mean electric field values for \( \left|\overrightarrow{\mathrm{E}}\right| \) and E_⊥ within the target region. For each location the value for the standard coil orientation and the optimized coil orientation are given. The optimized values are determined for both outcome measures (\( \left|\overrightarrow{\mathrm{E}}\right| \) and E_⊥) individually. The cortical target location coding can be found in Table 1.

ISSN: 1743-0003