J Neurol Neurosurg Psychiatry 49:1160-1164 doi:10.1136/jnnp.49.10.1160
  • Research Article

Hypergraphia: a right hemisphere syndrome.


A new right hemisphere symptom is reported. Five stroke patients with lesions in the perisylvian cortico-subcortical or thalamic region of the right hemisphere produced linguistically correct but semantically loose writing. The behaviour was initiated by subtle prompting and continued semiautomatically. A possible mechanism underlying this hypergraphia is discussed.