Grigorios Nasios graduated from the Medical School of Ioannina University, Greece, in 1990, completed his specialty in neurology in 1996, and received his doctoral degree in Medicine from the same university in 2001. He is an associate professor at the Department of Speech and Language Therapy, University of Ioannina, Greece. His research interests mainly focus on cognitive and behavioral neurology, neurophysiology, aphasiology, disorders of communication in neurological diseases, dysphagia in stroke and neurocognitive disorders, and cognitive rehabilitation.