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An open source device for operant licking in rats.

Matthew Longley1, Ethan L Willis2, Cindy X Tay3

  • 1Undergraduate Program, University of Memphis , Memphis , TN , United States.

Peerj
|February 24, 2017
PubMed
Summary

Researchers developed an open-source Raspberry Pi-based system for precise operant licking experiments and environmental monitoring in behavioral studies. This innovative technology enhances data collection and analysis for neuroscience research.

Keywords:
Behavior testing deviceEnvironment variablesLicking responseOpen sourceOperant behaviorSingle board computer

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Area of Science:

  • Behavioral Neuroscience
  • Biotechnology
  • Computational Biology

Background:

  • Operant conditioning experiments are crucial for understanding learning and decision-making.
  • Accurate recording of licking behavior and environmental variables is essential for reliable results.
  • Existing systems can be expensive or lack flexibility for diverse research needs.

Purpose of the Study:

  • To develop an accessible and versatile open-source system for operant licking experiments.
  • To create a complementary device for real-time environmental monitoring.
  • To provide researchers with customizable tools for behavioral studies.

Main Methods:

  • Utilized Raspberry Pi for data acquisition from sensors (RFID, touch, motion) and control of output devices (LEDs, pumps).
  • Developed an operant licking device and an environmental monitoring device.
  • Trained rats using various reinforcement schedules (fixed ratio, variable ratio, progressive ratio) with sucrose or water rewards.
  • Implemented local data storage with optional wireless transfer to a remote server.

Main Results:

  • The operant device demonstrated high precision and temporal resolution for recording rapid licking behavior in rats.
  • Environmental monitoring data showed reliable and accurate measurements.
  • The system successfully supported operant conditioning experiments under different reinforcement schedules.

Conclusions:

  • The developed open-source system offers a cost-effective and adaptable solution for behavioral research.
  • The devices provide precise data collection for operant behavior and environmental factors.
  • Sharing the source code and 3D designs under an open-source license aims to foster innovation in the field.