He examined the differentiation between deeply recessed cortical tissue and underlying, subcortical nuclei. The limbic system is where the subcortical structures meet the cerebral cortex. The ventral pallidum lies within the basal ganglia, a group of subcortical nuclei. The amygdala receives visual information from the thalamus via the subcortical pathways. Axons from these leave the cortex and connect with subcortical structures including the basal ganglia. Conduction aphasia can also be seen in cases of cortical damage without subcortical extensions. The dorsal striatum is located in the subcortical region of the forebrain. There is a difference between cortical and subcortical dementia. The basal ganglia are a set of subcortical structures that direct intentional movements. This drive originates in the subcortical and limbic portions of the brain. MT is connected to a wide array of cortical and subcortical brain areas. An increase in cortical and subcortical NGF has been found in patients with Alzheimer's disease. The hippocampus also receives a number of subcortical inputs. Patients may develop subcortical dementia syndrome. These are distinct subcortical nuclei with differences in function.