A case of impaired naming and knowledge of body parts. Are limbs a separate subcategory?

A left hemisphere stroke patient presented a disproportionate difficulty for body part knowledge without autotopagnosia. The deficit concerned the lexical-semantic representation of body parts and was more severe for limbs.The ability to gesture was spared and action naming was not more impaired than object naming. On the basis of normal naming latencies we conclude that limbs are the most vulnerable component of the overall category of body parts. This vulnerability is not explained by unbalanced nuisance variables. More cognitive effort is probably required for the appropriate differentiation of limbs during semantic provessing and lexical access