Biomedical Engineering Reference
In-Depth Information
trained, and the sensitivity was computed as in (
4.35
). For the two-dimensional (2D) cursor task,
sensitivities were averaged over the
x
/
y
coordinates and an arbitrary 3000 sample window because
no clear marker of movement/nonmovement could be discriminated. The sorted position, velocity,
and gripping force neuronal sensitivities for each session's ensemble of neurons is plotted in Fig-
ure
4.9a
and
b
. Like the reaching task cellular analysis, an initially sharp decrease from maximum
FIgURE 4.9:
Sensitivity-based neuronal ranking for HP and HV for two recording sessions using an
RMLP: (a) session 1 and (b) session 2. The cortical areas corresponding to the 10 highest ranking HP,
HV, and GF neurons are given by the color map. HV, hand velocity; GF, grip force.
