Brainstem and Cerebellar Volume Loss and Associated Clinical Features in Progressive Supranuclear Palsy

Area of Science:

• Neuroscience
• Neuropathology

Background:

• Progressive Supranuclear Palsy (PSP) is a tauopathy affecting basal ganglia and midbrain.
• Cerebellar involvement in PSP is suggested by tau spread, but atrophy patterns are unclear.

Purpose of the Study:

• To investigate volume loss in the cerebellum and brainstem regions beyond the midbrain in PSP patients.
• To correlate regional brain volume with clinical features in PSP.

Main Methods:

• Cross-sectional observational study using MRI volumetric analysis.
• Compared 37 PSP patients with 38 Parkinson's disease (PD) patients and 35 healthy controls (HC).
• Correlated regional volumes with disease severity and cognitive scores.

Main Results:

• PSP patients showed smaller midbrain, corpus medullare, and flocculonodular lobe compared to HC.
• PSP patients had smaller midbrain, pons, and superior cerebellar peduncle (SCP) compared to PD.
• Cerebellar lobe volumes correlated with cognitive scores (FAB), and SCP/midbrain volumes correlated with PSP rating scale.

Conclusions:

• PSP involves significant brainstem and cerebellar volume loss, extending beyond the midbrain.
• Cerebellar atrophy is linked to cognitive deficits in PSP.
• Findings emphasize the cerebellum's involvement in PSP and warrant further research into its changes over time.