Deficits of knowledge versus executive control in semantic cognition: insights from cued naming.

@article{Jefferies2008DeficitsOK,
  title={Deficits of knowledge versus executive control in semantic cognition: insights from cued naming.},
  author={Elizabeth Jefferies and Karalyn Patterson and Matthew A. Lambon Ralph},
  journal={Neuropsychologia},
  year={2008},
  volume={46 2},
  pages={649-58}
}
Deficits of semantic cognition in semantic dementia and in aphasia consequent on CVA (stroke) are qualitatively different. Patients with semantic dementia are characterised by progressive degradation of central semantic representations, whereas multimodal semantic deficits in stroke aphasia reflect impairment of executive processes that help to direct and control semantic activation in a task-appropriate fashion [Jefferies, E., & Lambon Ralph, M. A. (2006). Semantic impairment in stroke aphasia… CONTINUE READING