TY - JOUR
T1 - White matter microstructural organization is higher with age in adult superior cerebellar peduncles
AU - Kanaan, Richard A.
AU - Allin, Matthew
AU - Picchioni, Marco M.
AU - Shergill, Sukhwinder S.
AU - McGuire, Philip K.
PY - 2016/4/14
Y1 - 2016/4/14
N2 - Using diffusion tensor imaging, we conducted an exploratory investigation of the relationship between white matter tract microstructure and age in 200 healthy adult subjects using tract-based spatial statistics (TBSS). Though most tracts showed the slight decline in microstructural organization with age widely noted, in both superior cerebellar peduncles (SCP) it correlated positively with age, a result not previously reported. We confirmed this by using an alternative method, and by repeating our TBSS analysis in an additional sample of 133 healthy adults. In exploring this surprising result we considered the possibility that this might arise from the continual cognitive and motor refinement that is enacted in the cerebellum: we found that tract microstructure in both SCPs was also strongly correlated with IQ, again in contrast with all other tracts, and its relationship with age mediated by IQ, as a training model would predict.
AB - Using diffusion tensor imaging, we conducted an exploratory investigation of the relationship between white matter tract microstructure and age in 200 healthy adult subjects using tract-based spatial statistics (TBSS). Though most tracts showed the slight decline in microstructural organization with age widely noted, in both superior cerebellar peduncles (SCP) it correlated positively with age, a result not previously reported. We confirmed this by using an alternative method, and by repeating our TBSS analysis in an additional sample of 133 healthy adults. In exploring this surprising result we considered the possibility that this might arise from the continual cognitive and motor refinement that is enacted in the cerebellum: we found that tract microstructure in both SCPs was also strongly correlated with IQ, again in contrast with all other tracts, and its relationship with age mediated by IQ, as a training model would predict.
KW - Aging
KW - Diffusion tensor imaging
KW - Fractional anisotropy
KW - Intelligence
KW - Training
UR - http://www.scopus.com/inward/record.url?scp=84974530705&partnerID=8YFLogxK
U2 - 10.3389/fnagi.2016.00071
DO - 10.3389/fnagi.2016.00071
M3 - Article
AN - SCOPUS:84974530705
SN - 1663-4365
VL - 8
JO - Frontiers in Aging Neuroscience
JF - Frontiers in Aging Neuroscience
IS - APR
M1 - 71
ER -