Apathy in patients with Parkinson’s disease following deep brain stimulation of the subthalamic nucleus

Research output: Contribution to journalSpecial issuepeer-review


  • Isabel Hindle Fisher
  • Hardev Pall
  • Rosalind D Mitchell
  • Jamilia Kausar
  • Andrea E Cavanna

Colleges, School and Institutes


Apathy has been reported as a possible adverse effect of deep brain stimulation of the subthalamic nucleus (STN-DBS). We investigated the prevalence and severity of apathy in 22 patients with Parkinson’s disease (PD) who underwent STN-DBS, as well as the effects of apathy on quality of life (QOL). All patients were assessed with the Lille Apathy Rating Scale (LARS), the Apathy Scale (AS), and the Parkinson’s Disease Questionnaire and were compared to a control group of 38 patients on pharmacotherapy alone. There were no significant differences in the prevalence or severity of apathy between patients who had undergone STN-DBS and those on pharmacotherapy alone. Significant correlations were observed between poorer QOL and degree of apathy, as measured by the LARS (p<0.001) and the AS (p=0.021). PD-related disability also correlated with both apathy ratings (p<0.001 and p=0.017, respectively). Our findings suggest that STN-DBS is not necessarily associated with apathy in the PD population; however, more severe apathy appears to be associated with a higher level of disability due to PD and worse QOL, but no other clinico-demographic characteristics.


Original languageEnglish
Pages (from-to)258-264
JournalCNS spectrums
Issue number3
Early online date6 May 2016
Publication statusE-pub ahead of print - 6 May 2016