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Updated: Jan 3, 2026

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
Published on: April 11, 2025
Progressive impairment of constructional abilities: a visuospatial sketchpad deficit?
1Dipartimento di Psicologia, Università di Milano-Bicocca, Edificio U6, Piazza dell'Ateneo Nuovo 1, Italy. costanza.papagno@unimib.it
Abstract:
The case of a patient, PC, with an impairment of constructional abilities due to a progressive degenerative disease is described. Ideomotor apraxia was also present. PC showed difficulties in all tasks requiring a "manipulation" of a visual model or requiring a visual model to address a specific movement or a choice among alternatives. The spatial component of mental imagery was also severely impaired. The conclusion was that the patient presented a deficit of the rehearsal component of the visuospatial sketchpad (VSSP). This produced an impairment of spatial learning, but spatial retrograde memory was preserved, as well as object recognition. The most prominent sites of atrophy were located in the parietal lobe bilaterally. A 3-year follow-up is reported, showing a progressive impairment of verbal abilities.
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