Dynamic Object Representations in Infants with and Without Fragile X Syndrome
Overview
Authors
Affiliations
Our visual world is dynamic in nature. The ability to encode, mentally represent, and track an object's identity as it moves across time and space is critical for integrating and maintaining a complete and coherent view of the world. Here we investigated dynamic object processing in typically developing (TD) infants and infants with fragile X syndrome (FXS), a single-gene disorder associated with deficits in dorsal stream functioning. We used the violation of expectation method to assess infants' visual response to expected versus unexpected outcomes following a brief dynamic (dorsal stream) or static (ventral stream) occlusion event. Consistent with previous reports of deficits in dorsal stream-mediated functioning in individuals with this disorder, these results reveal that, compared to mental age-matched TD infants, infants with FXS could maintain the identity of static, but not dynamic, object information during occlusion. These findings are the first to experimentally evaluate visual object processing skills in infants with FXS, and further support the hypothesis of dorsal stream difficulties in infants with this developmental disorder.
Perche O, Lesne F, Patat A, Raab S, Twyman R, Ring R J Neurodev Disord. 2021; 13(1):45.
PMID: 34625026 PMC: 8501595. DOI: 10.1186/s11689-021-09375-0.
Altered brain-wide auditory networks in a zebrafish model of fragile X syndrome.
Constantin L, Poulsen R, Scholz L, Favre-Bulle I, Taylor M, Sun B BMC Biol. 2020; 18(1):125.
PMID: 32938458 PMC: 7493858. DOI: 10.1186/s12915-020-00857-6.
Impaired Attention Orienting in Young Children With Fragile X Syndrome.
Chernenok M, Burris J, Owen E, Rivera S Front Psychol. 2019; 10:1567.
PMID: 31354578 PMC: 6635477. DOI: 10.3389/fpsyg.2019.01567.
Sensory Processing Phenotypes in Fragile X Syndrome.
Rais M, Binder D, Razak K, Ethell I ASN Neuro. 2018; 10:1759091418801092.
PMID: 30231625 PMC: 6149018. DOI: 10.1177/1759091418801092.
Visual motion processing deficits in infants with the fragile X premutation.
Gallego P, Burris J, Rivera S J Neurodev Disord. 2014; 6(1):29.
PMID: 25093044 PMC: 4121307. DOI: 10.1186/1866-1955-6-29.