An effective clustering procedure of neuronal response profiles in graded thermal stimulation

Seoung Bum Kim, Panaya Rattakorn, Yuan Bo Peng

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Functional data analysis has gained significant attention from a variety of disciplines. In the present study we propose an effective clustering procedure to categorize a number of profiles that are formed with nonlinear functions. The proposed clustering procedure first smoothes the data and then transforms the smoothed data to obtain their functional form. The coefficients of the function obtained from the preceding transformation step are used for clustering. Simulation studies under various scenarios indicated that our proposed clustering procedure correctly identified the true clusters and yielded better clustering results than a latent class cluster analysis, one of the existing clustering methods. Furthermore, the effectiveness of the proposed clustering procedure was demonstrated using real pain data in which the main objective is to characterize the responses of 144 spinal cord dorsal horn neurons with graded thermal stimuli that range from 37 °C to 51 °C in 2 °C increments. The results showed that the proposed clustering strategy can successfully elicit natural grouping of the neurons with similar response patterns to graded thermal stimuli.

Original languageEnglish
Pages (from-to)5818-5826
Number of pages9
JournalExpert Systems With Applications
Issue number8
Publication statusPublished - 2010 Aug


  • Clustering
  • Data mining
  • Functional data
  • Heat stimulation
  • Neuroscience
  • Smoothing
  • Transformation

ASJC Scopus subject areas

  • Engineering(all)
  • Computer Science Applications
  • Artificial Intelligence


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