Adults with dyscalculia show hyper-connectivity between primary visual cortex and inferior occipital cortex and fusiform gyrus¶

Claim · All claims
Evidence · 1 study · associational r2 · q3
Currency · newest study 2019 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2024: baselines and conditions change

Subclaims¶

q3 i? Functional connectivity between PVC and IOC and between PVC and FG is higher in adults with dyscalculia than controls. → Bulthé Jessica 2019

Evidence¶

Bulthé Jessica 2019¶

Bulthé Jessica, Prinsen Jellina, Vanderauwera Jolijn, Duyck Stefanie, Daniels Nicky, Gillebert Céline R., Mantini Dante, Op de Beeck Hans P., De Smedt Bert. (2019). Multi-method brain imaging reveals impaired representations of number as well as altered connectivity in adults with dyscalculia. Neuroimage, 190, 289-302. https://doi.org/10.1016/j.neuroimage.2018.06.012

q3 · i? · associational · r2

Resting-state functional connectivity analysis between the eight level-III seed ROIs in 24 dyscalculia and 24 control participants; Pearson correlations were Fisher r-to-Z transformed and group differences tested with t-tests at pFDR < 0.05.

"there were significant group differences for the connectivity between PVC (primary visual cortex) and IOC (t46 = −3.17, pFDR = 0.04) and between PVC and FG (t46 = −3.47, pFDR = 0.03) with higher connectivity in individuals with dyscalculia than in controls"

Discussion¶

Learner Variables¶

• Learning Disabilities and Developmental Differences — predictor: learners who differ on it differ in outcomes

Related Claims¶

• No white-matter structural connectivity differences between adults with dyscalculia and controls in the examined tracts — related
• Children with DD show greater brain activation than TD children in parietal, occipito-temporal and prefrontal regions during both addition and subtraction — related
• Children with DD show hyper-connectivity, not reduced connectivity, between the IPS and fronto-parietal and default mode networks during arithmetic — related
• Neuroimaging shows adults with DD exhibit stronger frontal activations during number semantics, reduced right parietal grey matter, and altered functional connectivity during non-symbolic magnitude comparison — related
• Adults with dyscalculia show less distinct non-symbolic number representations than matched controls in anterior parietal, frontal and temporal cortex — related
• Adults with DD show a smaller subitizing range and impaired enumeration of random sets across visual and tactile modalities — related
• DD children fail to disengage the default mode network during demanding arithmetic, showing aberrant coupling with task-positive IPS regions — related
• Math achievement correlates with ventral occipital-temporal NRE in both children and adults, with children relying on extrastriate and adults on anterior higher-order visual regions — related
• No univariate activation-level differences between adults with dyscalculia and controls during symbolic or non-symbolic number processing — related