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A systematic review of frontal lobe volume in autism spectrum disorder revealing distinct trajectories

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journal contribution
posted on 01.01.2022, 00:00 authored by J Crucitti, Christian HydeChristian Hyde, Peter EnticottPeter Enticott, Mark StokesMark Stokes
Frontal lobe volume has been extensively researched in individuals with Autism spectrum disorder (ASD), though findings are yet to be summarised to explain the developmental trends of frontal lobe volume. The aim of the present study is to consolidate all existing frontal lobe volume and age data of autistic individuals below 30 years of age, and compare this data to non-autistic (N-ASD) controls. Following a systematic review, frontal lobe volume data were obtained from seven papers. Raw data, or the means and standard deviations of frontal lobe volume, and age, were obtained from the studies giving 372 autistic and 190 N-ASD participants. Data were plotted and analysed. Findings revealed that regression lines of fit for ASD (R2L⁢i⁢n⁢e⁢a⁢r = 0.33; R2Q⁢u⁢a⁢d⁢r⁢a⁢t⁢i⁢c = 0.52) and N-ASD (R2L⁢i⁢n⁢e⁢a⁢r = 0.14; R2Q⁢u⁢a⁢d⁢r⁢a⁢t⁢i⁢c = 0.39) were significantly different by diagnosis (linear p = 0.002, quadratic p = 0.02) with quadratic models providing significantly better fit within ASD (p < 0.001) and N-ASD (p < 0.001). Additional analyses revealed that frontal lobe volume was greater in autistic individuals than N-ASD between two and four years (F(1,31) = 12.965, p < 0.005, η2 = 0.291). In the present study, there were distinct developmental trends for frontal lobe volume between ASD and N-ASD.

History

Journal

Journal of integrative neuroscience

Volume

21

Issue

2

Article number

57

Pagination

1 - 10

Publisher

I M R Press

Location

Hong Kong

ISSN

0219-6352

Language

eng

Publication classification

C1 Refereed article in a scholarly journal