Neurophysiology study of early visual processing of face and non-face recognition under simulated prosthetic vision.

Yuan Yang, Hong Guo, Shanbao Tong, Yisheng Zhu, Yihong Qiu

Research output: Contribution to journalArticle

Abstract

Behavioral researches have shown that the visual function can be partly restored by phosphene-based prosthetic vision for the non-congenital blinds. However, the early visual processing mechanisms of phosphene object recognition is still unclear. This paper aimed to investigate the electro-neurophysiology underlying the phosphene face and non-face recognition. The modulations of latency and amplitude of N170 component in the event-related potential (ERP) were analyzed. Our preliminary results showed that (1) both normal and phosphene face stimuli could elicit prominent N170; nevertheless, phosphene stimuli caused notable latency delay and amplitude suppression on N170 compared with normal stimuli and (2) under phosphene non-face stimuli, a slight but significant latency delay occurred compared with normal stimuli, while amplitude suppression was not observed. Therefore, it was suggested that (1) phosphene perception caused a disruption of the early visual processing for non-canonical images of objects, which was more profound in phosphene face processing; (2) the face-specific processing was reserved under prosthetic vision and (3) holistic processing was the major stage in early visual processing of phosphene face recognition, while part-based processing was attenuated due to the loss of the details.

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Phosphenes
Neurophysiology
Prosthetics
Processing
Behavioral research
Object recognition
Behavioral Research
Face recognition
Recognition (Psychology)
Evoked Potentials
Modulation

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

Cite this

@article{840bdfce838c4fa3b9ec2c854b29d6f8,
title = "Neurophysiology study of early visual processing of face and non-face recognition under simulated prosthetic vision.",
abstract = "Behavioral researches have shown that the visual function can be partly restored by phosphene-based prosthetic vision for the non-congenital blinds. However, the early visual processing mechanisms of phosphene object recognition is still unclear. This paper aimed to investigate the electro-neurophysiology underlying the phosphene face and non-face recognition. The modulations of latency and amplitude of N170 component in the event-related potential (ERP) were analyzed. Our preliminary results showed that (1) both normal and phosphene face stimuli could elicit prominent N170; nevertheless, phosphene stimuli caused notable latency delay and amplitude suppression on N170 compared with normal stimuli and (2) under phosphene non-face stimuli, a slight but significant latency delay occurred compared with normal stimuli, while amplitude suppression was not observed. Therefore, it was suggested that (1) phosphene perception caused a disruption of the early visual processing for non-canonical images of objects, which was more profound in phosphene face processing; (2) the face-specific processing was reserved under prosthetic vision and (3) holistic processing was the major stage in early visual processing of phosphene face recognition, while part-based processing was attenuated due to the loss of the details.",
author = "Yuan Yang and Hong Guo and Shanbao Tong and Yisheng Zhu and Yihong Qiu",
year = "2009",
month = "12",
day = "1",
language = "English (US)",
pages = "3952--3955",
journal = "Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings",
issn = "1557-170X",
publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Neurophysiology study of early visual processing of face and non-face recognition under simulated prosthetic vision.

AU - Yang, Yuan

AU - Guo, Hong

AU - Tong, Shanbao

AU - Zhu, Yisheng

AU - Qiu, Yihong

PY - 2009/12/1

Y1 - 2009/12/1

N2 - Behavioral researches have shown that the visual function can be partly restored by phosphene-based prosthetic vision for the non-congenital blinds. However, the early visual processing mechanisms of phosphene object recognition is still unclear. This paper aimed to investigate the electro-neurophysiology underlying the phosphene face and non-face recognition. The modulations of latency and amplitude of N170 component in the event-related potential (ERP) were analyzed. Our preliminary results showed that (1) both normal and phosphene face stimuli could elicit prominent N170; nevertheless, phosphene stimuli caused notable latency delay and amplitude suppression on N170 compared with normal stimuli and (2) under phosphene non-face stimuli, a slight but significant latency delay occurred compared with normal stimuli, while amplitude suppression was not observed. Therefore, it was suggested that (1) phosphene perception caused a disruption of the early visual processing for non-canonical images of objects, which was more profound in phosphene face processing; (2) the face-specific processing was reserved under prosthetic vision and (3) holistic processing was the major stage in early visual processing of phosphene face recognition, while part-based processing was attenuated due to the loss of the details.

AB - Behavioral researches have shown that the visual function can be partly restored by phosphene-based prosthetic vision for the non-congenital blinds. However, the early visual processing mechanisms of phosphene object recognition is still unclear. This paper aimed to investigate the electro-neurophysiology underlying the phosphene face and non-face recognition. The modulations of latency and amplitude of N170 component in the event-related potential (ERP) were analyzed. Our preliminary results showed that (1) both normal and phosphene face stimuli could elicit prominent N170; nevertheless, phosphene stimuli caused notable latency delay and amplitude suppression on N170 compared with normal stimuli and (2) under phosphene non-face stimuli, a slight but significant latency delay occurred compared with normal stimuli, while amplitude suppression was not observed. Therefore, it was suggested that (1) phosphene perception caused a disruption of the early visual processing for non-canonical images of objects, which was more profound in phosphene face processing; (2) the face-specific processing was reserved under prosthetic vision and (3) holistic processing was the major stage in early visual processing of phosphene face recognition, while part-based processing was attenuated due to the loss of the details.

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