My left brain and me: a dissociation in the perception of self and others

Brady, Nuala; Campbell, Mark J.; Flaherty, Mary

doi:10.1016/j.neuropsychologia.2004.02.007

Cited by 70 publications

(53 citation statements)

References 24 publications

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“…An earlier PET study looking at the effects of active recognition versus passive recognition of the selfface found activity in a bilateral network (Sugiura et al, 2000). Behavioral evidence in favor of LH dominance (Brady et al, 2004) also exists, and we found dual hemispheric competence in recognition of the self in normals (Uddin et al, 2002) as well as in split-brains (Uddin et al, 2003). These inconsistencies may in part be accounted for by differences in methodologies and control tasks utilized.…”

Section: Introductionsupporting

confidence: 70%

Self-face recognition activates a frontoparietal “mirror” network in the right hemisphere: an event-related fMRI study

et al. 2005

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Self-recognition has been demonstrated by a select number of primate species and is often used as an index of self-awareness. Whether a specialized neural mechanism for self-face recognition in humans exists remains unclear. We used event-related fMRI to investigate brain regions selectively activated by images of one's own face. Ten righthanded normal subjects viewed digital morphs between their own face and a gender-matched familiar other presented in a random sequence. Subjects were instructed to press a button with the right hand if the image looked like their own face, and another button if it looked like a familiar or scrambled face. Contrasting the trials in which images contain more bselfQ with those containing more familiar botherQ revealed signal changes in the right hemisphere (RH) including the inferior parietal lobule, inferior frontal gyrus, and inferior occipital gyrus. The opposite contrast revealed voxels with higher signal intensity for images of botherQ than for bselfQ in the medial prefrontal cortex and precuneus. Additional contrasts against baseline revealed that activity in the bselfQ minus botherQ contrasts represent signal increases compared to baseline (null events) in bselfQ trials, while activity in the botherQ minus bselfQ contrasts represent deactivations relative to baseline during bselfQ trials. Thus, a unique network involving frontoparietal structures described as part of the bmirror neuron systemQ in the RH underlies self-face recognition, while regions comprising the bdefault/resting stateQ network deactivate less for familiar others. We provide a model that reconciles these findings and previously published work to account for the modulations in these two networks previously implicated in social cognition. D 2004 Elsevier Inc. All rights reserved.

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Section: Introductionsupporting

confidence: 70%

Self-face recognition activates a frontoparietal “mirror” network in the right hemisphere: an event-related fMRI study

et al. 2005

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“…Finally, evidence from split brain patients already present in the pioneering work of the Nobel laureate Roger Sperry, showed that interrupting communication across the hemispheres due to the resection of the corpus callosum, did not prevent the identification of others' faces and self-recognition (Sperry et al 1979). This special case, the recognition of one's own face, has resurrected more recently as a topic of interest in the study of split brain patients and normal subjects, providing conflicting evidence on the hemispheric biases of self-recognition, much resembling the contradictory results obtained in the case of face familiarity: some studies have reported a right-hemispheric lateralization (Preilowski 1977;Keenan et al 2001Keenan et al , 2003, other studies a left-hemispheric lateralization (Turk et al 2002;Brady et al 2004) and others no asymmetry (Uddin et al 2005). Neuropsychological data on both prosopagnosic and split brain patients have also concerned the specific issue of perception of emotion expression, and the overall pattern of evidence, taken together with that derived from behavioural studies in normal subjects, confirms that the identification and recognition of facial affect and emotion expression is separate from identity recognition, and might be more strongly lateralized in favour of the right hemisphere (Bowers et al 1985;Stone et al 1996;Adolphs et al 2001;Coolican et al 2008).…”

Section: Visual Modality: Lateralization Of Face and Gaze Perceptionmentioning

confidence: 99%

Asymmetries of the human social brain in the visual, auditory and chemical modalities

Brancucci

Lucci

Mazzatenta

et al. 2008

Phil. Trans. R. Soc. B

104

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Structural and functional asymmetries are present in many regions of the human brain responsible for motor control, sensory and cognitive functions and communication. Here, we focus on hemispheric asymmetries underlying the domain of social perception, broadly conceived as the analysis of information about other individuals based on acoustic, visual and chemical signals. By means of these cues the brain establishes the border between 'self ' and 'other', and interprets the surrounding social world in terms of the physical and behavioural characteristics of conspecifics essential for impression formation and for creating bonds and relationships. We show that, considered from the standpoint of single-and multi-modal sensory analysis, the neural substrates of the perception of voices, faces, gestures, smells and pheromones, as evidenced by modern neuroimaging techniques, are characterized by a general pattern of right-hemispheric functional asymmetry that might benefit from other aspects of hemispheric lateralization rather than constituting a true specialization for social information.

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“…On the opposite, detection of the familiar person was better when the images were presented to the right than to the left hemisphere. More recently, healthy participants were asked to choose which of two chimeric faces (one made from the left half and one made from the right half of their face) looked more like themselves (Brady et al, 2004). They showed a bias for the composite made from the half face that lies in their right visual field when they look at themselves in the mirror.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, hearing our own voice played back does not account for bone conductance and therefore a recording of our voice rarely sounds like our own voice heard from inside. Moreover, manipulating voices and faces is hardly comparable 1 . Hence, in addition to the self-face, the self-body was used instead of the own name or voice.…”

Section: Introductionmentioning

confidence: 99%

Here I am: The cortical correlates of visual self-recognition

et al. 2007

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Recently, interest in the neural correlates of self-recognition has grown. Most studies concentrate on self-face recognition. However, there is a lack of convergence as to precise neuroanatomical locations underlying self-face recognition. In addition, recognition of familiar persons from bodies has been relatively neglected. In the present study, cerebral activity while participants performed a task in which they had to indicate the real appearance of themselves and of a gender-matched close colleague among intact and altered pictures of faces and bodies was measured. The right frontal cortex and the insula were found to be the main regions specifically implicated in visual self-recognition compared with visual processing of other highly familiar persons. Moreover, the right anterior insula along with the right anterior cingulate seemed to play a role in the integration of information about oneself independently of the stimulus domain. The processing of self-related pictures was also compared to scrambled versions of these pictures. Results showed that different areas of the occipito-temporal cortex were more or less recruited depending on whether a face or a body was perceived, as it has already been reported by several recent studies. The implication of present findings for a general framework of person identification is discussed.

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My left brain and me: a dissociation in the perception of self and others

Cited by 70 publications

References 24 publications

Self-face recognition activates a frontoparietal “mirror” network in the right hemisphere: an event-related fMRI study

Self-face recognition activates a frontoparietal “mirror” network in the right hemisphere: an event-related fMRI study

Asymmetries of the human social brain in the visual, auditory and chemical modalities

Here I am: The cortical correlates of visual self-recognition

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