Failure to evoke visual images in a case of long-lasting cortical blindness

Erica Policardi, Daniela Perani, Stefano Zago, Franco Grassi, Ferruccio Fazio, Elisabetta Làdavas

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The paper reports the investigation of a 26-year-old man affected by cortical blindness for over 4 years. The patient showed a remarkable preservation of intelligence, language skills and a very mild memory disorder. He was, however, unable to perform any tasks requiring the use of information related to the visual appearance of places, symbols, objects and animals. In contrast, the performance on tasks exploring his knowledge of functional aspects of objects, animals and vegetables was unimpaired. This neuropsychological profile could be explained by an inability to derive internal visual images from long-term memory, which would drastically reduce the ability to retrieve visual semantic memories. Assessments of cerebral metabolism with [18F]FDG and PET revealed a calcarine and associative occipital hypometabolism, extending to the inferior and mesial temporal cortex.

Original languageEnglish
Pages (from-to)381-393
Number of pages13
JournalNeurocase
Volume2
Issue number5
Publication statusPublished - 1996

Fingerprint

Cortical Blindness
Aptitude
Long-Term Memory
Fluorodeoxyglucose F18
Memory Disorders
Task Performance and Analysis
Temporal Lobe
Intelligence
Semantics
Vegetables
Language
Animals
Visual Image
Blindness

ASJC Scopus subject areas

  • Clinical Neurology
  • Psychiatry and Mental health
  • Neurology
  • Psychology(all)

Cite this

Policardi, E., Perani, D., Zago, S., Grassi, F., Fazio, F., & Làdavas, E. (1996). Failure to evoke visual images in a case of long-lasting cortical blindness. Neurocase, 2(5), 381-393.

Failure to evoke visual images in a case of long-lasting cortical blindness. / Policardi, Erica; Perani, Daniela; Zago, Stefano; Grassi, Franco; Fazio, Ferruccio; Làdavas, Elisabetta.

In: Neurocase, Vol. 2, No. 5, 1996, p. 381-393.

Research output: Contribution to journalArticle

Policardi, E, Perani, D, Zago, S, Grassi, F, Fazio, F & Làdavas, E 1996, 'Failure to evoke visual images in a case of long-lasting cortical blindness', Neurocase, vol. 2, no. 5, pp. 381-393.
Policardi, Erica ; Perani, Daniela ; Zago, Stefano ; Grassi, Franco ; Fazio, Ferruccio ; Làdavas, Elisabetta. / Failure to evoke visual images in a case of long-lasting cortical blindness. In: Neurocase. 1996 ; Vol. 2, No. 5. pp. 381-393.
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