But it does seem clear that the general theories of
movement control advanced for the oculomotor system
do have analogues in the skeletomuscular system.
Further, injuries to any of these systems, in either
humans or monkeys, leads to permanent deficits not
in the musculature but in the ability to produce movements.
Finally, a small number of fMRI studies have
shown value-related signals in the posterior parietal
cortex, although these signals are almost always of
weaker magnitude than in more frontal areas. This, of
course, raises the possibility that the weaker fMRI signal
reflects the temporal dynamics of choice observed
in the Louie and Glimcher (2006) study. Because subjective
value is only represented until a decision is
made, in these areas the magnitude of the SV signal,
integrated over an entire trial, may be much less than
in areas located more frontally where SV is represented
throughout a trial.