Although object orientation in the human brain has been discussed extensively in the
literature, the nature of the underlying cognitive representation (s) remains uncertain. We
investigated orientation perception in BC, a patient with bilateral occipital and parietal
damage from a herpes encephalitis infection. Our results show that in addition to general
inaccuracy in discriminating and reproducing line orientations, her errors take the form of left–
right mirror reflections across a vertical coordinate axis. We propose that in BC, the cognitive …