图示脑萎缩主要发生在额叶和顶骨区域，表现为典型的脑回变窄和脑沟变宽。这里萎缩归因于Alzheimer老年痴呆（Alzheimer病）。
The cerebral atrophy seen here mainly in the frontal and parietal regions is characterized by narrowed gyri and widened sulci. The atrophy seen here was due to senile dementia of the Alzheimer's type (Alzheimer's disease).