A 51-year-old right-handed man with dilated cardiomyopathy, sleep apnea and atrial fibrillation suddenly suffered from transient color imperception, which completely recovered next morning. During the attack, both color naming and color pointing were severely disturbed, while he could correctly
Higher visual disorders as discussed in this paper comprise visual hallucinations, palinopsy, hemineglect, Balint Holmes syndrome, prosopagnosia, visual objectagnosia, alexia without agraphia and cerebral achromatopsia. Such disorders are frequently caused by ischemia, but tumors, trauma and