Giuseppe Vallar, MD, is a neurologist, Professor of Psychobiology and Physiological Psychology in the Department of Psychology, and a member of the NeuroMi, Milan Center for Neuroscience, of the University of Milano-Bicocca, Milan, Italy; he is the head of the Neuropsychological Laboratory of the IRCCS Italian Auxological Institute. He has worked in the Universities of Milano, and Sapienza in Rome. His main interests concern human neuropsychology, particularly: spatial and bodily cognition, their disorders (unilateral spatial neglect, somatoparaphrenia), and their neural correlates; the modulation of higher cognitive functions by sensory and transcranial magnetic and electrical stimulation; short-term (immediate) verbal memory, its disorders after brain damage, and its neural correlates; the assessment and rehabilitation of neuropsychological deficits, particularly unilateral spatial neglect. G. Vallar is the author of over 200 scientific publications, the editor of the books The cognitive and neural bases of spatial neglect (2002, with Hans-Otto Karnath and A. David Milner), of Neuropsychological disorders associated with subcortical lesions (1992, with Stefano F. Cappa and Claus W. Wallesch), of Neuropsychological impairments of short-term memory (1990, with Tim Shallice), and of two special issues of the Journal Cortex: Neuroplasticity: behavioral and neural aspects (2014, with Costanza Papagno), and Spatial Neglect. A representational disorder? A Festschrift for Edoardo Bisiach (2004, with John C. Marshall).
H. Branch Coslett, MD, is the William N. Kelley Professor of Neurology at the Perelman School of Medicine of the University of Pennsylvania in Philadelphia, Pennsylvania, USA. He also serves as Chief of Neurology at the Michael J Crescenz VA Medical Center in Philadelphia and previously worked at Temple University School of Medicine. His work has focused on a variety of topics in human cognitive neuroscience as well as non-invasive brain stimulation with Transcranial Magnetic Stimulation (TMS) and transcranial Direct Current Stimulation (tDCS). Studies with patients with brain lesions have included theoretically motivated explorations of cognitive disorders such as aphasia, alexia, neglect, apraxia, motor planning and disruptions of body cognition. He has also explored the anatomic bases of these disorders using techniques such as Voxel-Based Lesion-Symptom Mapping and support vector regression. He has used non-invasive brain stimulation both as therapy for neurologic disorders and to address questions regarding the neural basis of cognitive functions such as interval timing. Dr. Coslett is the author of more than 200 manuscripts and edited The Roots of Cognitive Neuroscience (with Anjan Chatterjee) as well as multiple special issues of journals. He is a founding editor of Neurocase (with John Hodges and Ian Roberts) and has served on multiple editorial boards.