University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Microstructural development: organizational differences of the fiber architecture between children and adults in dorsal and ventral visual streams.

Loenneker, T, Klaver, P, Bucher, K, Lichtensteiger, J, Imfeld, A and Martin, E (2011) Microstructural development: organizational differences of the fiber architecture between children and adults in dorsal and ventral visual streams. Hum Brain Mapp, 32 (6). pp. 935-946.

Full text not available from this repository.

Abstract

Visual perceptual skills are basically mature by the age of 7 years. White matter, however, continues to develop until late adolescence. Here, we examined children (aged 5-7 years) and adults (aged 20-30 years) using diffusion tensor imaging (DTI) fiber tracking to investigate the microstructural maturation of the visual system. We characterized the brain volumes, DTI indices, and architecture of visual fiber tracts passing through white matter structures adjacent to occipital and parietal cortex (dorsal stream), and to occipital and temporal cortex (ventral stream). Dorsal, but not ventral visual stream pathways were found to increase in volume during maturation. DTI indices revealed expected maturational differences, manifested as decreased mean and radial diffusivities and increased fractional anisotropy in both streams. Additionally, fractional anisotropy was increased and radial diffusivity was decreased in the adult dorsal stream, which can be explained by specific dorsal stream myelination or increasing fiber compaction. Adult dorsal stream architecture showed additional intra- and interhemispheric connections: Dorsal fibers penetrated into contralateral hemispheres via commissural structures and projection fibers extended to the superior temporal gyrus and ventral association pathways. Moreover, intra-hemispheric connectivity was particularly strong in adult dorsal stream of the right hemisphere. Ventral stream architecture also differed between adults and children. Adults revealed additional connections to posterior lateral areas (occipital-temporal gyrus), whereas children showed connections to posterior medial areas (posterior parahippocampal and lingual gyrus). Hence, in addition to dorsal stream myelination or fiber compaction, progressing maturation of intra- and interhemispheric connectivity may contribute to the development of the visual system.

Item Type: Article
Authors :
NameEmailORCID
Loenneker, TUNSPECIFIEDUNSPECIFIED
Klaver, Pp.klaver@surrey.ac.ukUNSPECIFIED
Bucher, KUNSPECIFIEDUNSPECIFIED
Lichtensteiger, JUNSPECIFIEDUNSPECIFIED
Imfeld, AUNSPECIFIEDUNSPECIFIED
Martin, EUNSPECIFIEDUNSPECIFIED
Date : June 2011
Identification Number : https://doi.org/10.1002/hbm.21080
Uncontrolled Keywords : Adult, Anisotropy, Child, Child, Preschool, Diffusion Tensor Imaging, Female, Humans, Image Interpretation, Computer-Assisted, Male, Nerve Fibers, Visual Pathways, Young Adult
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 10:40
Last Modified : 17 May 2017 14:51
URI: http://epubs.surrey.ac.uk/id/eprint/828709

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800