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Entropy 2015, 17(10), 6854-6871; doi:10.3390/e17106854

Analysis of Neural Oscillations on Drosophila’s Subesophageal Ganglion Based on Approximate Entropy

1
Department of Biomedical Engineering, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
2
Department of Anatomy and Neurobiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
3
College of Medical Engineering and Technology, Xinjiang Medical University, Urumqi 830011, China
4
Department of Neurology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
5
College of Public Health, Xinjiang Medical University, Urumqi 830011, China
*
Author to whom correspondence should be addressed.
Academic Editor: Raúl Alcaraz Martínez
Received: 13 August 2015 / Accepted: 30 September 2015 / Published: 10 October 2015
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Abstract

The suboesophageal ganglion (SOG), which connects to both central and peripheral nerves, is the primary taste-processing center in the Drosophila’s brain. The neural oscillation in this center may be of great research value yet it is rarely reported. This work aims to determine the amount of unique information contained within oscillations of the SOG and describe the variability of these patterns. The approximate entropy (ApEn) values of the spontaneous membrane potential (sMP) of SOG neurons were calculated in this paper. The arithmetic mean (MA), standard deviation (SDA) and the coefficient of variation (CVA) of ApEn were proposed as the three statistical indicators to describe the irregularity and complexity of oscillations. The hierarchical clustering method was used to classify them. As a result, the oscillations in SOG were divided into five categories, including: (1) Continuous spike pattern; (2) Mixed oscillation pattern; (3) Spikelet pattern; (4) Busting pattern and (5) Sparse spike pattern. Steady oscillation state has a low level of irregularity, and vice versa. The dopamine stimulation can distinctly cut down the complexity of the mixed oscillation pattern. The current study provides a quantitative method and some critera on mining the information carried in neural oscillations. View Full-Text
Keywords: Drosophila; oscillation; approximate entropy; subesophageal ganglion; clustering; dopamine Drosophila; oscillation; approximate entropy; subesophageal ganglion; clustering; dopamine
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Mei, T.; Qiao, J.; Zhou, Y.; Gu, H.; Chen, Z.; Tian, X.; Gu, K. Analysis of Neural Oscillations on Drosophila’s Subesophageal Ganglion Based on Approximate Entropy. Entropy 2015, 17, 6854-6871.

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