Permutation entropy applied to movement behaviors of Drosophila melanogaster

Yuedan Liu, Tae Soo Chon, Hunki Baek, Younghae Do, Jin Hee Choi, Yun Doo Chung

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25 Scopus citations


Movement of different strains in Drosophila melanogaster was continuously observed by using computer interfacing techniques and was analyzed by permutation entropy (PE) after exposure to toxic chemicals, toluene (0.1 mg/m3) and formaldehyde (0.01 mg/m3). The PE values based on one-dimensional time series position (vertical) data were variable according to internal constraint (i.e. strains) and accordingly increased in response to external constraint (i.e. chemicals) by reflecting diversity in movement patterns from both normal and intoxicated states. Cross-correlation function revealed temporal associations between the PE values and between the component movement patterns in different chemicals and strains through the period of intoxication. The entropy based on the order of position data could be a useful means for complexity measure in behavioral changes and for monitoring the impact of stressors in environment.

Original languageEnglish
Pages (from-to)1133-1142
Number of pages10
JournalModern Physics Letters B
Issue number12-13
StatePublished - 30 May 2011


  • Movement patterns
  • behavioral monitoring
  • cross-correlation
  • formaldehyde
  • strains
  • toluene


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