<unk>  is most often due to a lesion located in the dominant (usually left) hemisphere of the brain, typically in the frontal and parietal lobes. Lesions may be due to stroke, acquired brain injuries, or neurodegenerative diseases such as Alzheimer's disease or other dementias, Parkinson's disease, or Huntington's disease. It is also possible for<unk>  to be caused by lesions in other areas of the brain. Ideomotor<unk>  is typically due to a decrease in blood flow to the dominant hemisphere of the brain and particularly the parietal and premotor areas. It is frequently seen in patients with corticobasal degeneration. Ideational<unk>  has been observed in patients with lesions in the dominant hemisphere near areas associated with aphasia; however, more research is needed on ideational<unk>  due to brain lesions. The localization of lesions in areas of the frontal and temporal lobes would provide explanation for the difficulty in motor planning seen in ideational<unk>  as well as its difficulty to distinguish it from certain aphasias. Constructional<unk>  is often caused by lesions of the inferior non-dominant parietal lobe, and can be caused by brain injury, illness, tumor or other condition that can result in a brain lesion.
Apraxia
Pallor
Dyslexia
Diplophonia
Agnosia
Social-emotional agnosia
Anhedonia
Musical anhedonia