Estimation of frequency of occurrence of abstract designs after frontal or temporal lobectomy.
Patients with unilateral frontal- or temporal-lobe excisions and normal control subjects were shown a series of abstract designs. Within the series, the designs differed in the number of times that they appeared. The frontal-lobe groups (right more so than left) were impaired in recalling the frequency of occurrence of the designs. Recognition deficits were found only in the patients with right temporal-lobe lesions. The impairment in frequency estimation may reflect a disorderly search process in memory, or a deficit in cognitive estimation, or both.
Smith
M L
ML
Montreal Neurological Institute, McGill University, Quebec, Canada.
Milner
B
B
D005556:Form Perception / Q000502:physiology*; D005625:Frontal Lobe / Q000601:surgery*; D006801:Humans; D008568:Memory / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology*; D011612:Psychosurgery; D012640:Seizures / Q000601:surgery; D013702:Temporal Lobe / Q000601:surgery*