Hallo!!!
Ich lese gerade eine englische Studie und rätsel über die Bedeutung von „fractional anisotropy“.
Hier einmal der Satz:
Another marker of fiber integrity, fractional anisotropy (FA)
decreases with age in centrum semiovale and parietal
pericallosal regions, the genu of the corpus callosum and in
some samples, in the splenium.
Dann frage ich mich, was „FA“ damit zu tun hat:
Notably, in addition to a
consistent age trend in FA decreases in the white matter,
the gray matter (especially the lentiform nucleus) values
increase with age (Furutani et al., 2005; Zhang et al., 2005).
Ist die graue Substanz also stärker vom Alter betroffen?
Was bdeudetet der "average diffusion coefficient?
Advanced age is associated with an increase in average diffusion coefficient
(ADC) of the whole brain, frontal white matter and
lentiform nucleus but not in the parietal white matter,
posterior limb of internal capsule, thalamus, and corpus
callosum.
Daaaaaaaaaaaaaaaaaaaanke!
Gruß