Inconsistent language lateralisation – Testing the dissociable language laterality hypothesis using behaviour and lateralised cerebral blood flow

Parker, Adam J; Woodhead, Zoe; Carey, David P.; Groen, Margriet A.; Gutiérrez-Sigut, Eva; Hodgson, Jessica; Hudson, John M.; Karlsson, Emma; MacSweeney, Mairéad; Payne, Heather; Simpson, Nuala H.; Thompson, Paul A.; Watkins, Kate E.; Egan, Ciara; Grant, Jack H.; Harte, Sophie; Hudson, B.; Sablik, Maria; Badcock, Nicholas A.; Bishop, Dorothy V. M.

doi:10.1016/j.cortex.2022.05.013

Cited by 17 publications

(6 citation statements)

References 64 publications

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“…We additionally over sampled left-handers at this point (33 left-handers; 48.5% of the sample). The decision to over sample left-handers followed previous work (COLA Consortium, 2022;Parker et al, 2021).…”

Section: Participantsmentioning

confidence: 99%

Opposite perceptual biases in analogous auditory and visual tasks are unique to consonant-vowel strings and are unlikely a consequence of repetition

Parker,

Hontaru,

Lin

et al. 2023

Preprint

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Despite wide reporting of a right ear (RE) advantage on dichotic listening tasks and a right visual field advantage (RVF) of visual half-field tasks, we know very little about the relationship between these perceptual biases. Previous studies that have investigated perceptual asymmetries for analogous auditory and visual consonant-vowel tasks have indicated a serendipitous finding: a RE advantage and a left visual field (LVF) advantage with poor cross-modal correlations. In this study we examined the possibility that this LVF for visual processing of consonant-vowel strings may be a consequence of repetition by examining perceptual biases in analogous auditory and visual tasks for both consonant-vowel strings and words. We replicated opposite perceptual biases for consonant-vowel strings (RE and LVF advantages). This did not extend to word stimuli where we found RE and RVF advantages. Furthermore, these perceptual biases did not differ across three experimental blocks. Thus, we can firmly conclude that this LVF is unique to consonant-vowel strings and is not a consequence of the repetition of a relatively limited number of stimuli. Finally, a test of covariances indicated cross-modal relationships between laterality indices suggesting that perceptual biases are dissociable within individuals and cluster on mode of presentation (auditory vs. visual).

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Section: Participantsmentioning

confidence: 99%

Opposite perceptual biases in analogous auditory and visual tasks are unique to consonant-vowel strings and are unlikely a consequence of repetition

Parker,

Hontaru,

Lin

et al. 2023

Preprint

View full text Add to dashboard Cite

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“…For example, language is multidimensional, and the strength of cerebral lateralization differs according to the different tasks used to assess it (e.g., phonological decision, sentence generation, syntactic decision tasks ;Woodhead et al, 2019). Therefore, one should be cautious when studying functional lateralization since it appears to be task-dependent (Parker et al, 2022;Planton et al, 2022). Another difference between the left and right hemispheres is that the former processes information locally and analytically, whereas the latter processes information globally and holistically (Brederoo et al, 2017;.…”

Section: Handedness and Cerebral Lateralizationmentioning

confidence: 99%

“…Functional lateralization can vary depending on the degree and the direction of handedness (Johnstone et al, 2021;Parker et al, 2022). Right-handers are generally strongly lateralized, whereas lefthanders exhibit a bilateral hemispheric representation or even a right hemisphere dominance (Carey & Johnstone, 2014;Isaacs et al, 2006;Pujol et al, 1999;.…”

Section: Handedness and Cerebral Lateralizationmentioning

confidence: 99%

Development of laterality: Asymmetrical human behaviors and perceptual biases

Hamaoui¹

2022

Preprint

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Many asymmetries characterize human functioning at the behavioral level, such as handedness (right-handedness, left-handedness, mixed-handedness) and the cerebral level. Atypical laterality is frequently mentioned in scientific literature as part of the clinical picture of several neurodevelopmental and psychiatric disorders. Thus, understanding the neurodevelopmental mechanisms underlying laterality could shed light on the etiology of cognitive and motor difficulties. The goal of this thesis is twofold. Firstly, the theoretical objective was to investigate the involvement of the prenatal environment in the development of handedness. The influence of the vestibular system, fetal presentation, and other perinatal factors related to pregnancy complications and birth stressors were tested. Our results show no influence of the fetal presentation on the subsequent development of handedness. Perinatal adversities such as prematurity, low birthweight, and poor neonatal health reflected by very low Apgar scores however, appear to be risk factors which increase the prevalence of atypical handedness and motor impairments. Secondly, the applied objective was to simultaneously detect the different perceptual biases implicated in graphomotor productions. A 3D-2D transcription graphic task was proposed for identifying global patterns of drawing asymmetries, underpinned by cerebral lateralization, biomechanical constraints, and sociocultural influences. Our results suggest that cerebral lateralization, modulated by handedness and sex, influence graphomotor asymmetries in both children and adults. However, this influence is weaker in adults, which could be due to sociocultural influences.

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“…For example, there has been interest in whether hemispheric asymmetries during linguistic processing are different when children with DLD are compared to TD children (Bishop, 2013). While laterality per se has not proved conclusive (Parker et al, 2022), one of the most consistent findings in the functional fMRI literature with DLD children is that left frontal and temporal cortical areas show reduced activation during language processing (Asaridou & Watkins, 2022, for review). Children with DLD also show microstructural differences in dorsal anatomical pathways that connect frontal and temporal areas, as well as structurally-atypical basal ganglia (Badcock et al, 2012; Lee et al, 2013; Watkins et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Neural processing of rhythmic speech by children with developmental language disorder (DLD): An EEG study

Keshavarzi,

Richards,

Feltham

et al. 2024

Preprint

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Sensitivity to rhythmic and prosodic cues in speech has been described as a precursor of language acquisition. Consequently, atypical rhythmic processing during infancy and early childhood has been considered a risk factor for developmental language disorders. This is the ‘atypical rhythm risk’ (ARR) hypothesis. The neural processing of rhythmic speech has not yet been explored in children with developmental language disorder (DLD). Here we utilise EEG and a rhythmic speech paradigm previously utilised for dyslexia to investigate the ARR hypothesis in 9-year-old children with and without DLD. We investigate angular velocity, power, ERPs, phase-amplitude coupling (PAC) and phase-phase coupling (PPC), at three frequency bands, delta, theta and low gamma. Both groups demonstrated significant and equivalent phase entrainment in the delta and theta bands, but only the control children showed significant phase entrainment in the low gamma band. Further, while angular velocity in the delta and theta bands was equivalent by group, there was a significant gamma-band difference. The children with DLD also exhibited significantly more theta and gamma power compared to the control children. Regarding PAC and PPC, both groups showed significant and equivalent coupling strength. However, group resultant phase differences showed that low-frequency phase (delta and theta) affected gamma oscillations differently by group. The EEG data show important differences between children with and without DLD in the neural mechanisms underpinning the processing of rhythmic speech. The findings are discussed in terms of auditory theories of DLD.

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Inconsistent language lateralisation – Testing the dissociable language laterality hypothesis using behaviour and lateralised cerebral blood flow

Cited by 17 publications

References 64 publications

Opposite perceptual biases in analogous auditory and visual tasks are unique to consonant-vowel strings and are unlikely a consequence of repetition

Opposite perceptual biases in analogous auditory and visual tasks are unique to consonant-vowel strings and are unlikely a consequence of repetition

Development of laterality: Asymmetrical human behaviors and perceptual biases

Neural processing of rhythmic speech by children with developmental language disorder (DLD): An EEG study

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