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Recent research suggests that faces contain the most information in the horizontal orientation band (Dakin & Watt, J Vis 2009), and the size of the behavioural face inversion effect (bFIE) is correlated with changes in horizontal tuning following inversion (Pachai et al., VSS 2011). Moreover, ERP studies have shown that 1) the N170 is delayed and sometimes increased in amplitude following inversion, 2) the N170 and bFIE are correlated (Jacques and Rossion, NeuroImage 2007), and 3) the N170 inversion effect decreases when horizontal information is scrambled (Jacques et al., VSS 2011). However, the question remains whether the N170 is associated with horizontal tuning, and how that association varies with face inversion. To answer these questions, observers completed a 10AFC identification task using filtered faces. In the full-face condition, faces contained information at all orientations. In the horizontal …