Heart rate asymmetry and emotional response to robot-assist task challenges in post-stroke patients

Herbert Jelinek, Katherine G. August, Md Hasan Imam, Ahsan H. Khandoker, Alexander Koenig, Robert Riener

Research output: Book chapter/Published conference paperConference paperpeer-review

9 Citations (Scopus)


The level of motivation or stress influences learning the use of a robot-assist device for walking. Heart rate asymmetry (HRA) indicates the level of parasympathetic (HRA<0.5) and sympathetic (HRA>0.5) involvement in heart rate regulation. Three patients and seven controls were presented increasing levels of task difficulty. During training patients showed an increase in stress as indicated by the HRA index (0.524±0.02) in contrast to control participants (0.485±0.03). As the task complexity increased, the HRA in the patient group was atypical and falling below 0.5, compared to control (HRA>0.5). The latter result reflects an increased cognitive involvement and a higher sympathetic predominance in accordance with an increased task difficulty. Thus stroke affected the response to the task challenges in that the patient response to increasing task challenge leads to an inversion of HRA associated with a decreased mental engagement and higher risk of sudden cardiac death.
Original languageEnglish
Title of host publicationComputing in Cardiology 2011
Subtitle of host publicationVolume 38
Place of PublicationUnited States
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages4
ISBN (Print)9781457706127
Publication statusPublished - 2011
Event38th Computing in Cardiology Conference, CinC 2011
- Zhejiang University, Hangzhou, China
Duration: 18 Sept 201121 Sept 2011
http://cinc.org/2011/ (Conference website)
http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6156579 (Conference proceedings)

Publication series

ISSN (Print)0276-6574


Conference38th Computing in Cardiology Conference, CinC 2011
OtherComputing in Cardiology provides an international forum for scientists and professionals from the fields of medicine, physics, engineering and computer science, and has been held annually since 1974.
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