Pure apraxic agraphia with abnormal writing stroke sequences: report of a Japanese patient with a left superior parietal haemorrhage
- aCerebrovascular Division, Department of Internal Medicine, National Cardiovascular Center, Japan, bDepartment of Neurology, Brain Research Institute, Niigata University, Japan, cDepartment of Speech Therapy, Takeda General Hospital, Japan
- Dr Mika Otsuki, Cerebrovascular Division, Department of Internal Medicine, National Cardiovascular Center, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565, Japan. Telephone 0081 6 833 5012; fax 0081 6 872 7486.
- Received 30 April 1998
- Revised 10 August 1998
- Accepted 25 August 1998
Abstract
A 67 year old Japanese male patient had pure agraphia after a haemorrhage in the left superior parietal lobule. He developed difficulty in letter formation but showed no linguistic errors, consistent with the criteria of apraxic agraphia. He manifested a selective disorder of sequencing writing strokes, although he was able to orally state the correct sequences. The patient’s complete recovery after 1 month, without new learning, showed that he had manifested a selective disorder of writing stroke sequences. These findings indicate that the final stage of the execution of writing according to acquired sequential memory shown as a stroke sequence can be selectively disturbed, and should be considered to be distinct from the ability of character imagery and the knowledge of the writing stroke sequence itself. This case also indicates that the left superior parietal lobule plays an important part in the execution of writing.
