👉 Injoint, also known as an interhemispheric lesion, is a condition where two or more brain regions are affected simultaneously. This can occur in various neurological disorders and conditions, including stroke, Parkinson's disease, multiple sclerosis, and certain types of cancer. The term "injoint" comes from the Latin word "injunctus," which means "interference." In joint terms, an injoint is a region where two or more brain regions are affected at the same time.