Are babies born with left-hemisphere language dominance? An fNIRS study.

Phetsamone, Vannasing; Anne, Gallagher; Paquette, Natacha; Tremblay, Julie; Florea, Olivia; Safi, Dima; Rene, Bland; Leporé, Franco; Lassonde, Maryse

doi:10.3389/conf.fnhum.2015.217.00312

Cited by 1 publication

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“…Previous studies have shown that the left hemisphere of the human brain is dominant in the language processing (Ojemann et al 1989;Phetsamone et al 2015) and typically develops faster than the right hemisphere, especially in language-related regions in early life (Qiu et al 2015;Reynolds et al 2019). One reason for this difference in development is that language and speech centers tend to develop in this part of brain.…”

Section: Disrupted Development Of Network Efficiency Properties In Th...mentioning

confidence: 99%

Developmental Alterations in Brain Network Asymmetry in 3- to 9-Month Infants with Congenital Sensorineural Hearing Loss

Liu

Zhou

et al. 2023

Preprint

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Auditory exposure plays crucial roles in shaping healthy brain development and generating lateralization of functional network organization. However, little is known about whether and how an initial lack of auditory exposure in early infancy may disrupt development of functional network lateralization. We addressed this issue by recruiting 55 infants with congenital sensorineural hearing loss (SNHL) and 60 typically developing (TD) controls. Resting-state fNIRS imaging data were acquired to construct hemispheric cerebral networks, and graph theory was applied to quantify the topological characteristics of hemispheric networks. The infants with SNHL exhibited efficient small-world characteristic within each hemispheric network, however, the lateralization of functional network efficiency was substantially disrupted. Compared with TD infants with significantly increased network efficiency lateralized toward left hemisphere with age, the SNHL infants did not exhibit the emergence and development of such cerebral lateralization. Furthermore, the increased leftward asymmetry in nodal efficiency with age was found in TD but not in SNHL infants. Interestingly, the degree of hearing loss had no correlation with lateralization strength in the SNHL group. These results suggest that SNHL infants exhibited disrupted development of cortical lateralization in functional network organization, and highlight the importance of auditory stimulation-promoted multisensory functional integration in early infancy.

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