Apraxia: see Chapter 2.

Gerstmann syndrome: agraphia, acalculia, left-right confusion, finger agnosia; infarct of angular or supramarginal gyrus.

Hemineglect: patient ignores contralateral half of external space or own body, sometimes denies hemiplegia on that side (anosognosia), or cannot recognize affected limb as one’s own (asomatognosia); usually parietal lobe lesion.

Altered spatial perception: difficulty copying simple diagrams (constructional apraxia), interpreting maps or maintaining physical orientation (topographagnosia), putting on clothing (dressing apraxia); convexity lesions, especially parietal.