question: This abnormality provides a potential mechanism underlying object naming and word comprehension failures caused by left temporal tip atrophy and also explains the preponderance of semantic paraphasias, superordinate identification errors and coordinate mispointing tendencies that have been reported repeatedly in patients with anterotemporal atrophy and clinical features of semantic dementia (Snowden et al, 1989; Hodges et al, 1992; Jefferies and Lambon Ralph, 2006). 