Tim Charnock Tim suffered a stroke, and now has dysarthria. Although he doesn't have aphasia, he finds the charity hugely helpful. And he has supported the charity from day one. Dysarthria often is characterised by slurred or slow speech that can be difficult to understand. Common causes of dysarthria include nervous system (neurological) disorders such as stroke, brain injury, brain tumours, and conditions that cause facial paralysis or tongue or throat muscle weakness. Tim is still okay with reading writing and numbers. The charity helps to keep his mind busy.