Objective To assess the efficacy of bilateral pedunculopontine nucleus (PPN) deep brain stimulation (DBS) as a treatment for primary progressive freezing of gait (PPFG).
Methods A patient with PPFG underwent bilateral PPN-DBS and was followed clinically for over 14 months.
Results The PPFG patient exhibited a robust improvement in gait and posture following PPN-DBS. When PPN stimulation was deactivated, postural stability and gait skills declined to pre-DBS levels, and fluoro-2-deoxy-d-glucose positron emission tomography revealed hypoactive cerebellar and brainstem regions, which significantly normalised when PPN stimulation was reactivated.
Conclusions This case demonstrates that the advantages of PPN-DBS may not be limited to addressing freezing of gait (FOG) in idiopathic Parkinson's disease. The PPN may also be an effective DBS target to address other forms of central gait failure.
- Primary progressive gait failure
- deep brain stimulation
- pedunculopontine nucleus
- freezing of gait
- movement disorders
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Funding This study was self-funded by the authors as an extension of the patient's clinical management and not supported by specific funding. RAW, TC and PS received financial support from Medtronic Australasia to attend the Australasian Deep Brain Stimulation Meeting in 2009.
Competing interests None.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.