Skip to content

Research at St Andrews

Dissociating neural activity associated with the subjective phenomenology of monocular stereopsis: an EEG study

Research output: Contribution to journalArticle

Open Access Status

  • Embargoed (until 26/04/20)

Author(s)

Makoto Uji, Ines Jentzsch, James Redburn, Dhanraj Vishwanath

School/Research organisations

Abstract

The subjective phenomenology associated with stereopsis, of solid tangible objects separated by a palpable negative space, is conventionally thought to be a by-product of the derivation of depth from binocular disparity. However, the same qualitative impression has been reported in the absence of disparity, e.g., when viewing pictorial images monocularly through an aperture. Here we aimed to explore if we could identify dissociable neural activity associated with the qualitative impression of stereopsis, in the absence of the processing of binocular disparities. We measured EEG activity while subjects viewed pictorial (non-stereoscopic) images of 2D and 3D geometric forms under four different viewing conditions (Binocular, Monocular, Binocular aperture, Monocular aperture). EEG activity was analysed by oscillatory source localization (beamformer technique) to examine power change in occipital and parietal regions across viewing and stimulus conditions in targeted frequency bands (alpha: 8–13Hz & gamma: 60–90Hz). We observed expected event-related gamma synchronization and alpha desynchronization in occipital cortex and predominant gamma synchronization in parietal cortex across viewing and stimulus conditions. However, only the viewing condition predicted to generate the strongest impression of stereopsis (monocular aperture) revealed significantly elevated gamma synchronization within the parietal cortex for the critical contrasts (3D vs. 2D form). These findings suggest dissociable neural processes specific to the qualitative impression of stereopsis as distinguished from disparity processing.
Close

Details

Original languageEnglish
Pages (from-to)357-371
JournalNeuropsychologia
Volume129
Early online date26 Apr 2019
DOIs
Publication statusPublished - Jun 2019

    Research areas

  • Stereopsis, Monocular aperture, EEG, Qualitative impression, Parietal cortex, Gamma synchronization

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Eye fixation during multiple object attention is based on a representation of discrete spatial foci

    Fluharty, M., Jentzsch, I., Spitschan, M. & Vishwanath, D., 26 Aug 2016, In : Scientific Reports. 6, 13 p., 31832.

    Research output: Contribution to journalArticle

  2. Identifying cortical substrates underlying the phenomenology of stereopsis and realness: a pilot fMRI study

    Uji, M., Lingnau, A., Cavin, I. & Vishwanath, D., 11 Jul 2019, In : Frontiers in Neuroscience. 13, 14 p., 646.

    Research output: Contribution to journalArticle

  3. A shape-level flanker facilitation effect in contour integration and the role of shape complexity

    Gillespie, C. & Vishwanath, D., May 2019, In : Vision Research. 158, p. 221-236

    Research output: Contribution to journalArticle

  4. Exploring the role of self/other perspective-shifting in theory of mind with behavioural and EEG measures

    Bradford, E. E. F., Gomez, J-C. & Jentzsch, I., 2019, In : Social Neuroscience. 14, 5, p. 530-544 15 p.

    Research output: Contribution to journalArticle

Related by journal

  1. Distorted gaze direction input to the attentional priority map in spatial neglect

    Balslev, D. & Odoj, B., Aug 2019, In : Neuropsychologia. 131, p. 119-128 10 p.

    Research output: Contribution to journalArticle

  2. Elements of person knowledge: Episodic recollection helps us to identify people but not to recognize their faces

    MacKenzie, G. & Donaldson, D. I., 1 Dec 2016, In : Neuropsychologia. 93, A, p. 218-228 11 p.

    Research output: Contribution to journalArticle

  3. Improved effectiveness of performance monitoring in amateur instrumental musicians

    Jentzsch, I., Mkrtchian, A. & Kansal, N., Jan 2014, In : Neuropsychologia. 52, p. 117-124 8 p.

    Research output: Contribution to journalArticle

  4. Inconsistent emotion recognition deficits across stimulus modalities in Huntington's disease

    Rees, E. M., Farmer, R., Cole, J. H., Henley, S. M. D., Sprengelmeyer, R., Frost, C., Scahill, R. I., Hobbs, N. Z. & Tabrizi, S. J., Nov 2014, In : Neuropsychologia. 64, p. 99-104 6 p.

    Research output: Contribution to journalArticle

ID: 258758557

Top