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Oral exploratory behaviors are traditionally grouped with the Klüver–Bucy syndrome (KBS; psychic blindness, oral tendencies, hypermetamorphosis, placidity, change of sexual behavior, altered dietary habits).1 Among the six symptoms, the oral tendency is most frequently observed and is thought to be the core symptom.1
We report two patients who showed oral exploratory behaviors but had lesions in the frontal, not temporal lobes. These findings suggest that oral tendencies may be manifest as one of the behavior disorders caused by a frontal lobe lesion.
Case reports.
Patient 1.
The patient was a 75-year-old right-handed woman with a history of hypertension who suddenly developed right hemiplegia and aphasia on July 6, 1995. She was taken to a nearby hospital, where she was diagnosed with a cerebral hemorrhage and underwent an operation to remove the hematoma. She was transferred to our hospital on September 11, 1995. On admission, she was fully conscious and had no dysarthria or dysphagia. She had a right hemiparesis and mixed transcortical aphasia. The orbicularis oris reflex was positive, and forced grasping with the …
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