Assertion: tremor's symptom | /r/RelatedTo | non-dopaminergic mechanisms
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text: Evidence from PET and SPECT molecular imaging studies have shown that dopamine transporter is less affected in tremor-dominant compared with akinetic-rigid patients and that tremor does not correlate with dopamine transporter levels, assessed with [123I]FP-CIT SPECT (Asenbaum et al., 1998), dopamine terminal capacity, assessed with [18F]FDOPA PET (Brooks et al., 1992), nor dopamine D2 receptor availability, assessed with [11C]raclopride PET (Pavese et al., 2006), which suggests that this symptom could be associated with non-dopaminergic mechanisms.