Sleep in Gerstmann-Straüssler-Scheinker disease.

Area of Science:

• Neurology
• Sleep Medicine
• Prion Diseases

Background:

• Gerstmann-Sträussler-Scheinker (GSS) is a rare, heterogeneous prion disease.
• Sleep abnormalities are common in other prion diseases but poorly understood in GSS.

Purpose of the Study:

• To evaluate sleep patterns in genetically confirmed GSS cases.
• To compare sleep characteristics in GSS with other prionopathies.

Main Methods:

• Clinical history, sleep scales, and video-polysomnography were used.
• Neurological and neuropsychological assessments, CSF analysis, MRI, and PET scans were performed.

Main Results:

• Two GSS patients reported insomnia; one reported no sleep issues.
• Video-polysomnography revealed normal sleep staging but reduced sleep efficiency in two patients.
• Obstructive apneas and periodic leg movements in sleep were observed in some GSS patients.

Conclusions:

• Normal sleep staging in GSS suggests different brain region involvement compared to fatal familial insomnia.
• Non-specific sleep alterations like obstructive apneas and periodic leg movements in GSS require further investigation.
• Larger studies with neuropathological data are needed to clarify sleep disturbances in GSS.