J. Shin et A. Talnov, A single trial analysis of hippocampal theta frequency during nonsteady wheel running in rats, BRAIN RES, 897(1-2), 2001, pp. 217-221
It has been suggested that hippocampal theta rhythm codes some aspects of m
otor behavior, but previous studies of the correlation between theta freque
ncy and steady whole body locomotion speed using both linear tracks and whe
els have provided inconsistent if not contradictory results. Because the re
lationship between temporal dynamics of theta frequency and non-steady (or
dynamic) whole body locomotion speed can help clarify this issue, single tr
ials of hippocampal EEG were analyzed together with nonsteady wheel running
speed recorded during rats perform spontaneous normal locomotion in a whee
l. Changes in theta frequency within single trials show positive or negativ
e correlation with nonsteady wheel running speed. As the mean running speed
increases and the standard deviation of running speed decreases in a singl
e trial, the correlation between temporal dynamics of theta frequency and n
onsteady wheel running speed within the single trial tends to be positive.
In addition, we found that the amount of deceleration is also related to th
e polarity of the correlation coefficients. (C) 2001 Elsevier Science B.V.
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