In the case of a stroke, what side of the body is typically affected by damage from a left-sided brain injury?

In the case of a stroke, a left-sided brain injury typically affects the right side of the body. This is due to the way the central nervous system is organized, where each hemisphere of the brain primarily controls the opposite side of the body. Thus, damage on the left side of the brain can lead to weakness, numbness, or paralysis on the right side. Neurological pathways cross over in the brainstem, meaning that signals originating from the left hemisphere will influence the right side of the body and vice versa. This is a fundamental principle in neuroanatomy and is critical for understanding the effects of brain injuries and strokes.