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Recording electrical activity from the brain of behaving octopus
Tamar Gutnick1, Andreas Neef2, Andrii Cherninskyi3
1Okinawa Institute of Science and Technology, Graduate University, Physics and Biology Unit, 904 0495 Okinawa, Japan; Department of Biology, University of Naples Federico II, Via Cintia 26, 80126 Napoli, Italy.
Current Biology : CB
|February 24, 2023
Summary
Researchers developed a new method to record brain activity in octopuses. This technique allows for long-term, in vivo recordings in untethered, behaving octopuses, revealing novel neural patterns.
Area of Science:
- Neuroscience
- Marine Biology
- Animal Behavior
Background:
- Octopuses are highly intelligent invertebrates with complex nervous systems.
- Previous methods for recording brain activity in animals are not feasible for octopuses due to their lack of rigid structures and their ability to remove foreign objects.
- Understanding octopus brain function is crucial for invertebrate intelligence research.
Purpose of the Study:
- To develop a novel technique for recording brain activity in unanesthetized, untethered, behaving octopuses.
- To establish a platform for correlating neural activity with observed behaviors in octopuses.
- To identify distinct brain activity patterns in octopuses.
Main Methods:
- A portable data logger and electrodes were implanted into the octopus's vertical lobe system.
- Brain activity was recorded for up to 12 hours in freely moving octopuses.
- Simultaneous video recordings captured behavior for synchronization with neural data.
Main Results:
- Successfully recorded brain activity from unanesthetized, untethered octopuses for extended periods.
- Identified consistent, distinct neural activity patterns across all subjects.
- Observed novel oscillatory patterns, including 2 Hz large amplitude oscillations, not previously reported in octopuses.
Conclusions:
- The developed technique enables in vivo neural recordings in behaving octopuses, overcoming previous technical challenges.
- The study provides a foundation for future research into the neural mechanisms underlying octopus behavior.
- Novel brain activity patterns were discovered, offering new insights into cephalopod neurobiology.
