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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Brain Stimul. 2015 Jan 24;8(3):613–623. doi: 10.1016/j.brs.2015.01.407

Figure 1.

Figure 1

Experimental paradigm. A. Figure-8 coil is positioned obliquely near the transverse plane superior to the visual cortex (1.5~2cm apart from the cortical surface). Its midpoint is aligned to the left visual cortex craniotomy (Horsley-Clarke coordinates P4 L2). Tungsten electrode penetration is made at an angle of A45, M0. B. We examine how rTMS alters selectivity of cells in the visual cortex. To do this, we measure orientation, spatial frequency, and contrast tuning properties of cells and compare the properties between pre- and post-TMS conditions. For orientation tuning run, 7~10 differently oriented circular grating patches (stimulus duration: 2 seconds, inter-stimulus interval: 2 seconds) are presented in a cell’s classical receptive field in each trial (depicted as squares below the time arrow). 4Hz TMS pulse train is delivered for 4 seconds in the inter-trial interval (10 seconds) between 15th and 16th trials. Black and gray colors are used to represent pre- and post-TMS conditions, respectively.