Octopuses Have Sleep Cycles, Too

Curiosity Weekly

Warner Bros. Discovery

Science

4.6 • 963 Ratings

🗓️ 18 May 2021

⏱️ 12 minutes

🔗️ Recording | iTunes | RSS

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Summary

Learn about imaginary beams of motion coming from people’s eyes; where lost luggage ends up; and octopus sleep cycles.

Following someone's gaze may involve imagining a beam of motion from their eyes by Grant Currin

Our Brains “See” Beams Of Motion Emanating From People’s Faces Towards The Object Of Their Attention. (2021, February 25). Research Digest; Research Digest. https://digest.bps.org.uk/2021/02/25/our-brains-see-beams-of-motion-emanating-from-peoples-faces-towards-the-object-of-their-attention/
Guterstam, A., & Graziano, M. S. A. (2020). Visual motion assists in social cognition. Proceedings of the National Academy of Sciences, 117(50), 32165–32168. https://doi.org/10.1073/pnas.2021325117
Guterstam, A., & Graziano, M. S. A. (2020). Implied motion as a possible mechanism for encoding other people’s attention. Progress in Neurobiology, 190, 101797. https://doi.org/10.1016/j.pneurobio.2020.101797
Guterstam, A., Wilterson, A. I., Wachtell, D., & Graziano, M. S. A. (2020). Other people’s gaze encoded as implied motion in the human brain. Proceedings of the National Academy of Sciences, 117(23), 13162–13167. https://doi.org/10.1073/pnas.2003110117

This Is Where Most of the Lost Luggage in the US Ends Up originally aired May 10, 2018 https://omny.fm/shows/curiosity-daily/everything-repellent-clothing-resonant-breathing-a

We finally discovered alternating sleep states in an octopus by Cameron Duke

Medeiros, S. L. de S., Paiva, M. M. M. de, Lopes, P. H., Blanco, W., Lima, F. D. de, Oliveira, J. B. C. de, Medeiros, I. G., Sequerra, E. B., Souza, S. de, Leite, T. S., & Ribeiro, S. (2021). Cyclic alternation of quiet and active sleep states in the octopus. IScience, 0(0). https://doi.org/10.1016/j.isci.2021.102223
Schnell, A. (2021, April 1). Sleeping octopuses might experience fleeting dreams – new study. The Conversation. https://theconversation.com/sleeping-octopuses-might-experience-fleeting-dreams-new-study-158237#:~:text=During%20quiet%20sleep%2C%20octopuses%20are

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Transcript

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0:00.0	Hi, you're about to get smarter in just a few minutes with Curiosity Daily from Curiosity.com.
0:06.0	I'm Cody Goff.
0:07.0	And I'm Ashley Hamer.
0:08.0	Today you learn about imaginary beams of motion coming from people's eyes,
0:12.6	get ready for that, where most of the lost luggage in the US ends up,
0:16.8	and why it's a big deal that we discovered alternating sleep states
0:20.7	in an octopus.
0:22.1	Let's satisfy some curiosity.
0:24.0	Do your eyes, you know, shoot out invisible beams that scan the world?
0:30.0	I mean, if you asked a little kid how vision works they might say yeah or at least
0:34.6	something along those lines the funny thing is ancient thinkers like
0:38.9	Ptolemy and Galen thought the same thing and a good number of college students who had just taken a psychology class
0:47.0	also thought something along those lines,
0:49.0	at least according to one study.
0:51.0	Eyes shooting out invisible beams that scan the world is kind of the opposite of how it works.
0:57.0	But the misconception is so common that some psychologists argue that our brains must be predisposed to thinking that way.
1:06.0	In fact, there's some evidence that points in that direction.
1:10.0	One study found that when people look at an image of someone gazing at an object,
1:15.0	they're slower to recognize subtle movement between the person's eyes and that object,
1:20.0	as if their brains were already visualizing movement in that direction.
1:25.8	Another study found that seeing someone gaze at an object activated the same motion areas
1:30.4	of the brain as actual motion does.
	...

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