Lateral Asymmetries and Interhemispheric Transfer in Aging: A Review and Some New Data

Beaton, Alan A.; Hugdahl, Kenneth; Ray, Philip.

doi:10.1007/0-306-46884-0_5

Cited by 19 publications

(17 citation statements)

References 206 publications

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“…However, they all confirmed that they were ''over 50'' which, although they may have been considerably older, was considered a tactful way of enabling the experimenter to estimate at least a lower age limit. In any case, in at least some experiments, changes in lateralised performance with age have been observed in participants under 60 years of age (e.g., Beaton et al, 2000). Moreover, we note that there was a statistically significant overall difference in accuracy of performance and in response times between our two groups of participants, albeit that the difference was not large.…”

Section: Discussionsupporting

confidence: 56%

“…According to the right hemisphere ageing hypothesis (Goldstein & Shelly, 1981), all functions mediated predominantly or exclusively by the right hemisphere undergo more pronounced decline with age than those subserved by the left hemisphere (for reviews see Alves et al, 2008;Beaton, Hugdahl, & Ray, 2000;Cabeza, 2002;Dolcos, Rice, & Cabeza, 2002;Nebes, 1990). In a functional imaging study in which young and older adults were presented 490 BEATON ET AL.…”

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confidence: 99%

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Processing emotion from the eyes: A divided visual field and ERP study

Beaton

Fouquet

Maycock

et al. 2011

Laterality: Asymmetries of Body, Brain and Cognition

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The right cerebral hemisphere is preferentially involved in recognising at least some facial expressions of emotion. We investigated whether there is a laterality effect in judging emotions from the eyes. In one task a pair of emotionally expressive eyes presented in central vision had to be physically matched to a subsequently presented set of eyes in one or other visual hemifield (eyes condition). In the second task a word was presented centrally followed by a set of eyes to left or right hemifield and the participant had to decide whether the word correctly described the emotion portrayed by the laterally presented set of eyes (word condition). Participants were a group of undergraduate students and a group of older volunteers (> 50). There was no visual hemifield difference in accuracy or raw response times in either task for either group, but log-transformed times showed an overall left hemifield advantage. Contrary to the right hemisphere ageing hypothesis, older participants showed no evidence of a relative right hemisphere decline in performance on the tasks. In the younger group mean peak amplitude of the N170 component of the EEG at lateral posterior electrode sites was significantly greater over the right hemisphere (T6/PO2) than the left (T5/PO1) in both the perceptual recognition task and the emotional judgement task. It was significantly greater for the task of judging emotion than in the eyes-matching task. In future it would be useful to combine electrophysiological techniques with lateralised visual input in studying lateralisation of emotion with older as well as younger participants.

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Section: Discussionsupporting

confidence: 56%

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confidence: 99%

Processing emotion from the eyes: A divided visual field and ERP study

Beaton

Fouquet

Maycock

et al. 2011

Laterality: Asymmetries of Body, Brain and Cognition

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“…A clear majority of the population ( ϳ 90%) prefers the right hand for manual activities, with superior fine motor control and motor strength. 1 Thus, the example with left-and right-handedness poses an important conceptual distinction between structural, or object, symmetry and functional, or activity-related, asymmetry. Two objects may show mirror symmetry with regard to shape and structure, although the functions of the two are clearly asymmetrical.…”

Section: Structural Versus Functional Symmetry and Asymmetrymentioning

confidence: 99%

Symmetry and asymmetry in the human brain

Hugdahl¹

2005

European Review

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Structural and functional asymmetry in the human brain and nervous system is reviewed in a historical perspective, focusing on the pioneering work of Broca, Wernicke, Sperry, and Geschwind. Structural and functional asymmetry is exemplified from work done in our laboratory on auditory laterality using an empirical procedure called dichotic listening. This also involves different ways of validating the dichotic listening procedure against both invasive and non-invasive techniques, including PET and fMRI blood flow recordings. A major argument is that the human brain shows a substantial interaction between structurally, or ‘bottom-up’ asymmetry and cognitively, or ‘top-down’ modulation, through a focus of attention to the right or left side in auditory space. These results open up a more dynamic and interactive view of functional brain asymmetry than the traditional static view that the brain is lateralized, or asymmetric, only for specific stimuli and stimulus properties.

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“…102,103) , outros mencionam que a assimetria permanece inalterada com a idade (e.g. 37,104) e, outros ainda, que a assimetria manual ao longo da idade depende do tipo de tarefas usadas bem como da sua complexidade (e.g. 100,105) .…”

Section: Assimetrias Manuais: Adultos E Idososunclassified

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Bento¹

2010

RPCD

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Lateral Asymmetries and Interhemispheric Transfer in Aging: A Review and Some New Data

Cited by 19 publications

References 206 publications

Processing emotion from the eyes: A divided visual field and ERP study

Processing emotion from the eyes: A divided visual field and ERP study

Symmetry and asymmetry in the human brain

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