“…The frontal lobe regions most often implicated in performance of the WCST are either more posterior or inferior than those we have identi®ed (e.g. Tien, Schlaper, Orr & Pearlson, 1998;Catefau, Parellada, Lomena, Bernardo, Setoain, Catarineu, Pavia & Herranz, 1998;Barcelo, Sanz, Molvia & Rubia, 1997). Similarly, the frontal regions implicated in verbal¯uency performance include Brodmann areas 6, 11, 44 and 46 of the left hemisphere (e.g.…”