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Updated: Jun 26, 2026

Rating L-DOPA-Induced Dyskinesias in the Unilaterally 6-OHDA-Lesioned Rat Model of Parkinson's Disease
Published on: October 4, 2021
Unilateral RLS with predominantly ipsilateral PLMS and variable response to dopaminergic drugs: a variant of
P O Valko1, M M Siccoli, C L Bassetti
1Department of Neurology, University Hospital of Zurich, Zurich, Switzerland.
Background:
Restless legs syndrome (RLS) is characterized by sensorimotor symptoms that usually are localized in both legs, but may present considerable asymmetry. Patients with strictly and persisting unilateral manifestations have not yet been reported.
Methods:
We describe the clinical and electrophysiological characteristics of three RLS patients with unilateral symptoms.
Results:
All essential RLS criteria were fulfilled in each patient. Neuroimaging and electrophysiological studies did not reveal structural lesions. All patients showed a predominance of periodic limb movements in sleep (PLMS) ipsilaterally to the RLS symptoms. Treatment response to dopaminergic drugs was favourable only in one patient.
Controls:
Our observations suggest the existence of unilateral RLS with predominantly ipsilateral PLMS as a (so-far unrecognized) variant of RLS.
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