So are they contradicting this? from April, 2011.
Mental Practice With Motor Imagery Does Not Help In Stroke Recovery
http://nnr.sagepub.com/content/26/5/470.abstract?etoc
Abstract
Background. Motor imagery (MI) is increasingly recognized as a treatment option after stroke, but not all stroke patients are able to
perform MI. Objective. To examine if severe somatosensory deficits would affect MI ability. Methods.
The Box and Block Test (BBT) was used to evaluate mental chronometry as
1 component of MI. Two groups of stroke patients
and an age-matched healthy control group (CG) were
studied. Patient group 1 (n = 10, PG1) had a severe somatosensory
impairment
on the affected side and PG2 (n = 10) had pure
motor strokes. All subjects first performed the BBT in a mental and in a
real
version. The time needed to move 15 blocks from 1
side of the box to the other was measured. To compare the groups
independently
of their performance level, a (real performance −
MI)/(real performance) ratio was calculated. Corticospinal excitability
was measured by transcranial magnetic stimulation
at rest and while the subjects performed an imagined pinch grip. Results.
The CG performed the BBT faster than both patient groups, and PG1 was
slower than PG2. MI ability was impaired in PG1 but
only for the affected hand. Transcranial magnetic
stimulation data showed an abnormally low MI-induced corticospinal
excitability
increase for the affected hand in PG1, but not in
PG2. Conclusions. Severe somatosensory deficits impaired mental chronometry. A controlled study is necessary to clarify if these patients
benefit at all from MI as an additional treatment.
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