Summary: <p>This month Robert Wilson, Rush University Medical Center, Chicago, USA, on how dementia affects our knowledge of words, and the neuropathology which underlies this.</p><p>Also, the use of deep brain stimulation to treat Parkinson’s disease. Tom Foltynie describes the image guided, rather than microelectrode guided, technique used at the National Hospital of Neurology and Neurosurgery, London, UK, and the success they’ve had.</p><p>See also:</p><p>MRI-guided STN DBS in Parkinson’s disease without microelectrode recording: efficacy and safety http://tinyurl.com/a5nnod9</p><p>Loss of basic lexical knowledge in old age http://tinyurl.com/a3fpnjc</p>
