Sensory abnormalities in unaffected relatives in familial adult-onset dystonia.
cross_sectional · Level IV
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Abstract
Somatosensory abnormalities are found in adult-onset primary torsion dystonia (PTD). Therefore we assessed spatial discrimination thresholds (SDT), a measure of spatial acuity, in four multiplex families with adult-onset PTD. In family members aged 20 to 45 years vs controls (mean + 2.5 SD), abnormal SDTs were found in four of five affected with adult-onset PTD and in 12 of 49 unaffected relatives. Sensory abnormalities may be an endophenotype, possibly expressed later as adult-onset PTD.
Medical subject headings
- Dystonic Disorders
- Genetic Carrier Screening
- Genetic Predisposition to Disease
- Perceptual Disorders