Impurity scattering of warm holes in germanium and silicon

Abstract

Each year in the United States roughly 80,000 persons suffer an acquired aphasia (Brody, 1992). Some small percentage of these cases involves deaf individuals whose primary means of communication is a visual-manual language; in the United States, this is likely to be American Sign Language (ASL). Studies of sign language aphasia have advanced our understanding of the contributions of symbolic, motoric, and linguistic processes in human language. Importantly, these studies have helped alert the medical profession to the potential effects of this malady in the deaf population. This chapter provides an overview of the effects of left-and right-hemisphere damage in users of signed languages, and explores the theoretical implications of these findings. One aim of this chapter is to document the current status of the field and to foreshadow issues that are likely to be of interest in future studies.