Allographic agraphia: A case study

Alina Menichelli, Brenda Rapp, Carlo Semenza

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We report the case of patient MN, diagnosed with frontotemporal dementia, who exhibited a severe impairment in writing letters and words in upper-case print in the face of accurate production of the same stimuli in lower-case cursive. In contrast to her written production difficulties, MN was unimpaired in recognizing visually presented letters and words in upper-case print. We find a modest benefit of visual form cueing in the written production of upper-case letters, despite an inability to describe or report visual features of letters in any case or font. This case increases our understanding of the allographic level of letter-shape representation in written language production. It provides strong support for previous reports indicating the neural independence of different types of case and font-specific letter-shape information; it provides evidence that letter-shape production does not require explicit access to information about the visual attributes of letter shapes and, finally, it reveals the possibility of interaction between processes involved in letter-shape production and perception.

Original languageEnglish
Pages (from-to)861-868
Number of pages8
JournalCortex
Volume44
Issue number7
DOIs
Publication statusPublished - 2008

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Agraphia
Frontotemporal Dementia
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Keywords

  • Allograph
  • Allographic agraphia
  • Graphemic representations
  • Letter case
  • Letter font

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Neuropsychology and Physiological Psychology
  • Cognitive Neuroscience
  • Neuroscience(all)

Cite this

Menichelli, A., Rapp, B., & Semenza, C. (2008). Allographic agraphia: A case study. Cortex, 44(7), 861-868. https://doi.org/10.1016/j.cortex.2007.06.002

Allographic agraphia : A case study. / Menichelli, Alina; Rapp, Brenda; Semenza, Carlo.

In: Cortex, Vol. 44, No. 7, 2008, p. 861-868.

Research output: Contribution to journalArticle

Menichelli, A, Rapp, B & Semenza, C 2008, 'Allographic agraphia: A case study', Cortex, vol. 44, no. 7, pp. 861-868. https://doi.org/10.1016/j.cortex.2007.06.002
Menichelli A, Rapp B, Semenza C. Allographic agraphia: A case study. Cortex. 2008;44(7):861-868. https://doi.org/10.1016/j.cortex.2007.06.002
Menichelli, Alina ; Rapp, Brenda ; Semenza, Carlo. / Allographic agraphia : A case study. In: Cortex. 2008 ; Vol. 44, No. 7. pp. 861-868.
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