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Olfactory function in restless legs syndrome

C H Adler1, K A Gwinn, S Newman

  • 1Parkinson's Disease and Movement Disorders Center, Department of Neurology, Mayo Clinic Scottsdale, Arizona 85259, USA.

Movement Disorders : Official Journal of the Movement Disorder Society
|June 5, 1998
PubMed
Summary
This summary is machine-generated.

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Restless leg syndrome (RLS) does not appear to be linked to Parkinson's disease (PD). Olfactory function is normal in RLS patients, unlike in PD patients, suggesting different underlying causes.

Area of Science:

  • Neurology
  • Neuroscience
  • Sleep Medicine

Background:

  • Restless leg syndrome (RLS) and Parkinson's disease (PD) share similarities, including response to dopaminergic medications.
  • The underlying pathophysiology connecting RLS and PD remains unclear.
  • Parkinson's disease is known to be associated with olfactory dysfunction.

Purpose of the Study:

  • To investigate the potential shared pathophysiology between RLS and PD by comparing olfactory function.
  • To determine if RLS is a preclinical manifestation or variant of PD.

Main Methods:

  • Olfactory function was assessed in patients with idiopathic RLS, PD patients, and control groups.
  • The University of Pennsylvania Smell Identification Test (UPSIT) was utilized for olfactory testing.

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Main Results:

  • Patients with idiopathic RLS exhibited normal olfactory function.
  • Patients with Parkinson's disease showed significantly reduced olfactory function compared to controls and RLS patients.

Conclusions:

  • The distinct olfactory function profiles suggest that the pathophysiology of RLS differs from that of PD.
  • RLS is unlikely to be a preclinical sign or variant of Parkinson's disease.