scholarly journals Multimodal representations of person identity individuated with fMRI

Cortex ◽  
2017 ◽  
Vol 89 ◽  
pp. 85-97 ◽  
Author(s):  
Stefano Anzellotti ◽  
Alfonso Caramazza
Keyword(s):  
Person Identity ◽  
Multimodal Representations

scholarly journals Multimodal representations of person identity individuated with fMRI

2016 ◽  
Author(s):  
Stefano Anzellotti ◽  
Alfonso Caramazza
Keyword(s):  
Social Interactions ◽  
Superior Temporal Sulcus ◽  
Visual Modality ◽  
Auditory Information ◽  
Multivariate Classification ◽  
Person Identity ◽  
Multimodal Representations ◽  
Image Transformations ◽  
Posterior Superior Temporal Sulcus

AbtractRecognizing the identity of a person is fundamental to guide social interactions. We can recognize the identity of a person looking at her face, but also listening to her voice. An important question concerns how visual and auditory information come together, enabling us to recognize identity independently of the modality of the stimulus. This study reports converging evidence across univariate contrasts and multivariate classification showing that the posterior superior temporal sulcus (pSTS), previously known to encode polymodal visual and auditory representations, encodes information about person identity with invariance within and across modality. In particular, pSTS shows selectivity for faces, selectivity for voices, classification of face identity across image transformations within the visual modality, and classification of person identity across modality.

scholarly journals Pendidikan Kristiani sebagai Instrumen Penyadaran Pentingnya Pertumbuhan Spiritualitas dalam Konteks Budaya Populer

2016 ◽  
Vol 1 (2) ◽  
pp. 123
Author(s):  
Daniel Syafaat Siahaan
Keyword(s):  
Black Hole ◽  
Popular Culture ◽  
Christian Education ◽  
Spiritual Growth ◽  
Self Identity ◽  
Person Identity ◽  
Culture Concept

This article is written based on my observation and experience, who "sucked"� into populer culture. People inevitably will always "sucked"� into the black hole of culture. In popular culture, people are considered to be humans if only they satisfy their libido. So, popular culture can blurring self identity in the society, because communal similarity is preferred. Self identity formed from communal understanding of popular culture concept and force� someone to follow it. Therefore, the challenge of popular culture to spirituality is very obvious because it concerns a person identity. Spirituality always departs from the inside to the outside. While the phenomenon of popular culture, the meaning is controlled by the community and adapted into self. This article written to realizing the importance of spiritual growth in the context of popular culture, which can be done firstly through Christian Education.

scholarly journals Prediction-error signals to violated expectations about person identity and head orientation are doubly-dissociated across the dorsal and ventral visual streams

2018 ◽  
Author(s):  
Jonathan E. Robinson ◽  
Will Woods ◽  
Sumie Leung ◽  
Jordy Kaufman ◽  
Michael Breakspear ◽  
...  
Keyword(s):  
Error Detection ◽  
Visual Processing ◽  
Prediction Error ◽  
Predictive Coding ◽  
Angular Gyrus ◽  
Head Orientation ◽  
Visual Stream ◽  
Person Identity ◽  
Violated Expectations ◽  
Double Dissociations

AbstractPredictive coding theories of perception suggest the importance of constantly updated internal models of the world in predicting future sensory inputs. One implication of such models is that cortical regions whose function is to resolve particular stimulus attributes should also signal prediction violations with respect to those same stimulus attributes. Previously, through carefully designed experiments, we have demonstrated early-mid latency EEG/MEG prediction-error signals in the dorsal visual stream to violated expectations about stimulus orientation/trajectory, with localisations consistent with cortical areas processing motion and orientation. Here we extend those methods to simultaneously investigate the predictive processes in both dorsal and ventral visual streams. In this MEG study we employed a contextual trajectory paradigm that builds expectations using a series of image presentations. We created expectations about both face orientation and identity, either of which can subsequently be violated. Crucially this paradigm allows us to parametrically test double dissociations between these different types of violations. The study identified double dissociations across the type of violation in the dorsal and ventral visual streams, such that the right fusiform gyrus showed greater evidence of prediction-error signals to Identity violations than to Orientation violations, whereas the left angular gyrus and postcentral gyrus showed the opposite pattern of results. Our results suggest comparable processes for error checking and context updating in high-level expectations instantiated across both perceptual streams. Perceptual prediction-error signalling is initiated in regions associated with the processing of different stimulus properties.Significance StatementVisual processing occurs along ‘what’ and ‘where’ information streams that run, respectively along the ventral and dorsal surface of the posterior brain. Predictive coding models of perception imply prediction-error detection processes that are instantiated at the level where particular stimulus attributes are parsed. This implies that, for instance, when considering face stimuli, signals arising through violated expectations about the person identity of the stimulus should localise to the ventral stream, whereas signals arising through violated expectations about head orientation should localise to the dorsal stream. We test this in a magnetoencephalography source localisation study. The analysis confirmed that prediction-error signals to identity versus head-orientation occur with similar latency, but activate doubly-dissociated brain regions along ventral and dorsal processing streams.

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