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@ARTICLE{Ameli:19830,
author = {Ameli, M. and Kemper, F. and Sarfel, A.S. and Kessler, J.
and Fink, G.R. and Nowak, D.A.},
title = {{A}rbitrary visuo-motor mapping during object manipulation
in mild cognitive impairment and {A}lzheimer's disease: {A}
pilot study},
journal = {Clinical neurology and neurosurgery},
volume = {113},
issn = {0303-8467},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PreJuSER-19830},
pages = {453 - 458},
year = {2011},
note = {Record converted from VDB: 12.11.2012},
abstract = {Empirical evidence for an essential role of the hippocampal
system in arbitrary visuo-motor mapping suggests that
acquisition and retrieval of arbitrary visuo-motor mapping
might be impaired in mild cognitive impairment (MCI) and
Alzheimer's disease (AD). The present pilot study
investigated whether MCI of amnestic type or AD impact upon
the capacity to scale grip force in a predictive manner to
the mass of an object to be lifted based on learned
associations between arbitrary colour cues and mass.
Patients with MCI (n=8) and AD (n=8) grasped and lifted two
different masses (400g and 600g) in random order using a
precision grip between index finger and thumb. In a "no cue"
experiment, a non-informative neutral visual stimulus was
presented prior to each lift, thereby disallowing any
prediction about which of the two masses was going to be
lifted in the next trial. In a "cue" experiment an arbitrary
colour cue provided advance information about which of the
two masses to be lifted. In the "no cue" condition patients
scaled their grip force according to the mass of the
preceding lift. In the "cue" experiment neither patients
with amnestic MCI nor those with AD were able to adjust
their grip force based on visuo-motor mappings with
arbitrary colour cues. These preliminary data suggest that
the hippocampal system plays an essential role for arbitrary
visuo-motor mapping in the grip-lift task.},
keywords = {Aged / Aged, 80 and over / Alzheimer Disease:
physiopathology / Amnesia: physiopathology / Amnesia:
psychology / Brain Mapping: methods / Cognition Disorders:
physiopathology / Color / Cues / Data Interpretation,
Statistical / Female / Hand Strength: physiology /
Hippocampus: physiopathology / Humans / Learning: physiology
/ Male / Middle Aged / Movement: physiology / Pilot Projects
/ Psychomotor Performance: physiology / Weight Perception:
physiology / J (WoSType)},
cin = {INM-3},
ddc = {610},
cid = {I:(DE-Juel1)INM-3-20090406},
pnm = {Funktion und Dysfunktion des Nervensystems (FUEK409) /
89572 - (Dys-)function and Plasticity (POF2-89572)},
pid = {G:(DE-Juel1)FUEK409 / G:(DE-HGF)POF2-89572},
shelfmark = {Clinical Neurology / Surgery},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:21353384},
UT = {WOS:000292437100004},
doi = {10.1016/j.clineuro.2011.01.011},
url = {https://juser.fz-juelich.de/record/19830},
}