Research library

Papers about aphantasia and mental imagery, with summaries in plain words. The summaries are generated by AI and may contain errors.

2 papers match “Ortiz”. Clear the search

2023

Feedback signals in visual cortex during episodic and schematic memory retrieval and their potential implications for aphantasia

Bergmann and Ortiz-Tudela · Neuroscience & Biobehavioral Reviews

Researchers propose that aphantasia stems from specific deficits in high-level feedback signals along the visual "what" stream during memory retrieval. This suggests that memory impairments in aphantasia are tied to the inability to reinstate precise object features rather than a general episodic memory failure.

2022

Cortical activity involved in perception and imagery of visual stimuli in a subject with aphantasia. An EEG case report

Furman and colleagues · Neurocase

A 35-year-old man with lifelong aphantasia scored in the normal range or above on standard tests and high on mental rotation, which he said he solved with a body-based, non-visual strategy. His EEG was recorded as he looked at a face and then tried to picture it. For picturing, estimated brain activity began in left temporal rather than frontal areas, with no significant activity in rear visual areas or in a parietal area linked to imagery within 300 milliseconds. It is a single case with no comparison person, which the authors call only a first step.

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