The general problem of carbon monoxid asphyxia is reviewed. The serious neurological complications are enumerated. Special attention is given to the reports of aphasic disturbances. The fact that the damage to the nervous system can be widespread, and not simply confined to the globus pallidus, is pointed out.A case is reported, where the patient was revived after a suicidal attempt. He showed loss of the ability to perform certain skilled acts. Agraphia was present. A convulsive disorder has more recently supervened. Due to severe visuo-motor incoordination, he was unable to learn through concrete example, and a carefully planned retraining program, in which all instructions were completely verbalized, was the means by which the function of written speech was returned to the patient.