INVESTIGADORES
MANES Facundo Francisco
congresos y reuniones científicas
Título:
EMOTIONAL RECOGNITION OF UNRECOGNIZED VISUAL STIMULI IN A PERSON WITH POSTERIOR CORTICAL ATROPHY
Autor/es:
GONZALEZ GADEA, ML; DAMM, J; RICHLY, P; GELORMINI, C; MANES, F; IBAÑEZ, A; ROCA, M
Lugar:
Boston
Reunión:
Conferencia; Alzheimers Association 2013 International Conference; 2013
Institución organizadora:
Alzheimer?s Association
Resumen:
Non-conscious visual recognition has been described in patients with visual agnosia, indicating the existence of some kind of "pre-attentive" visual processing. However, few studies have investigated the role of "implicit" visual processing in the recognition of emotions generated by unrecognized visual stimuli. Methods: We recorded the skin conductance response (SCR) of a 67 year-old patient with posterior Cortical Atrophy (PCA), as well as 5 matched controls, during the presentation of neutral, positive and negative affective stimuli. We compared SCR of pictures depicting persons and objects selected from the International Affective Picture System (IAPS).We also recorded the SCR while the participants observed the same stimulus being degraded or camouflaged. After the presentation of each picture, the subjects were instructed to describe the picture and to indicate its valence (positive, negative or neutral). Results: Compared to controls, the patient with PCA exhibited the same pattern of SCR modulation between negative and positive stimulus, even when the stimulus presented was not recognized. In addition, while the controls failed to indicate the valence of degraded pictures, the patient with PCA was able to identify them. Conclusions: These results suggest that this patient could implicitly recognize emotions in the absence of visual conscious knowledge. Furthermore, we found the patient made successful use of compensatory strategies to recognize the valence of visual stimuli despite the visual deficits.