Wake-like skin patterning and neural activity during octopus sleep

Nature, Journal Year: 2023, Volume and Issue: 619(7968), P. 129 - 134

Published: June 28, 2023

Abstract While sleeping, many vertebrate groups alternate between at least two sleep stages: rapid eye movement and slow wave 1–4 , in part characterized by wake-like synchronous brain activity, respectively. Here we delineate neural behavioural correlates of stages octopuses, marine invertebrates that evolutionarily diverged from vertebrates roughly 550 million years ago (ref. 5 ) have independently evolved large brains sophistication. ‘Quiet’ octopuses is rhythmically interrupted approximately 60-s bouts pronounced body movements changes skin patterning texture 6 . We show these are homeostatically regulated, rapidly reversible come with increased arousal threshold, representing a distinct ‘active’ stage. Computational analysis active reveals diverse dynamics through set patterns conserved across strongly resembling those seen while awake. High-density electrophysiological recordings the central reveal local field potential (LFP) activity during resembles waking. LFP differs regions, strongest superior frontal vertical lobes, anatomically connected regions associated learning memory function 7–10 During quiet sleep, relatively silent but generate oscillations mammalian spindles 11,12 frequency duration. The range similarities indicates aspects two-stage may represent convergent features complex cognition.

Language: Английский

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The Case for Octopus Consciousness: Temporality

NeuroSci, Journal Year: 2022, Volume and Issue: 3(2), P. 245 - 261

Published: May 3, 2022

Temporality is one of the criteria that Birch has advanced for areas cognitive ability may underlie animal sentience. An to integrate and use information across time must be more than simply learning pieces retrieving them. This paper looks at such wider by octopuses time. It evaluates accumulation about one's place in space, as used immediate egocentric localization cuttlefish medium distance navigation octopuses. Information useful items environment can incorporated future octopuses, including shelter antipredator situations. Finding prey not random but predicted environmental cues, especially contingencies. Finally, examines unlimited associative constraints on learning, cephalopods explore seek out information, even play, use.

Language: Английский

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Recording electrical activity from the brain of behaving octopus

Current Biology, Journal Year: 2023, Volume and Issue: 33(6), P. 1171 - 1178.e4

Published: Feb. 23, 2023

Language: Английский

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Cuttlefish favour their current need to hide rather than their future need for food

Learning & Behavior, Journal Year: 2025, Volume and Issue: 53(1), P. 128 - 135

Published: Jan. 6, 2025

Language: Английский

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MicroRNAs are deeply linked to the emergence of the complex octopus brain

Science Advances, Journal Year: 2022, Volume and Issue: 8(47)

Published: Nov. 23, 2022

Soft-bodied cephalopods such as octopuses are exceptionally intelligent invertebrates with a highly complex nervous system that evolved independently from vertebrates. Because of elevated RNA editing in their tissues, we hypothesized regulation may play major role the cognitive success this group. We thus profiled messenger RNAs and small three cephalopod species including 18 tissues Octopus vulgaris. show innovation soft-bodied is an expansion microRNA (miRNA) gene repertoire. These evolutionarily novel miRNAs were primarily expressed adult neuronal during development had conserved likely functional target sites. The only comparable miRNA expansions happened, notably, Thus, propose intimately linked to evolution animal brains.

Language: Английский

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Biomechanics, motor control and dynamic models of the soft limbs of the octopus and other cephalopods

Journal of Experimental Biology, Journal Year: 2023, Volume and Issue: 226(Suppl_1)

Published: April 21, 2023

ABSTRACT Muscular hydrostats are organs composed entirely of packed arrays incompressible muscles and lacking any skeletal support. Found in both vertebrates invertebrates, they great interest for comparative biomechanics from engineering evolutionary perspectives. The arms cephalopods (e.g. octopus squid) particularly interesting muscular because their flexibility ability to generate complex behaviors exploiting elaborate nervous systems. Several lines evidence studies point the use brain arm-embedded motor control strategies that have evolved simplify complexities associated with flexible hyper-redundant limbs bodies. Here, we review earlier more recent experimental on arm neural control. We several dynamic models used predict kinematic characteristics basic motion primitives, noting shortcomings current accounting behavioral observations. also discuss significance impedance (stiffness viscosity) controlling octopus's behavior. These factors considered light new muscle could be future research gain a better understanding octopus. There is need updated encompass stiffness viscosity designing soft robotic arms. field robotics has boomed over past 15 years would benefit significantly further progress biomechanical other hydrostats.

Language: Английский

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Past, present, and future trends in octopus research

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 421 - 454

Published: Jan. 1, 2024

Language: Английский

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Octopus body language: body patterns of Abdopus capricornicus during social interactions

Marine Biology, Journal Year: 2025, Volume and Issue: 172(2)

Published: Jan. 31, 2025

Abstract Octopus are well known for their rapidly changing and diverse body patterning achieved through combinations of chromatic, textural, postural locomotory components. The function octopus patterns includes camouflage prey ambush predator avoidance, aposematic display to startle intruders predators, potentially intraspecific communication. However, as many species often solitary, during social interactions is largely unexplored. Here we provide the first detailed description associated components expressed diurnal reef-dwelling species, Abdopus capricornicus . This study aimed at disentangling used from those was by staging between pairs under controlled conditions in a bare sand environment devoid rocks or algae. While most studies on focused mating behaviour, this intrasexual (e.g. male-male, female-female) intersexual interactions. Notably, A. shows richest repertoire among coastal octopuses studied so far, including 10 which comprise 27 8 In addition, 18 types encounters were identified. Numerous specifically also identified, suggesting that complexity visual stimuli experienced , cues frequent interactions, may contribute its rich patterning.

Language: Английский

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Transcriptomic responses in the nervous system and correlated behavioural changes of a cephalopod exposed to ocean acidification

BMC Genomics, Journal Year: 2024, Volume and Issue: 25(1)

Published: June 25, 2024

Abstract Background The nervous system is central to coordinating behavioural responses environmental change, likely including ocean acidification (OA). However, a clear understanding of neurobiological OA lacking, especially for marine invertebrates. Results We evaluated the transcriptomic response (CNS) and eyes two-toned pygmy squid ( Idiosepius pygmaeus ) conditions, using de novo transcriptome assembly created with long read PacBio ISO-sequencing data. then correlated patterns gene expression CO 2 treatment levels OA-affected behaviours in same individuals. induced within related various different types neurotransmission, neuroplasticity, immune function oxidative stress. These molecular changes may contribute OA-induced changes, as suggested by correlations among profiles, behaviours. Conclusions This study provides first insights into effects on cephalopod correlates whole animal responses, helping bridge gaps our knowledge between change responses.

Language: Английский

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Functional organization of visual responses in the octopus optic lobe

Current Biology, Journal Year: 2023, Volume and Issue: 33(13), P. 2784 - 2793.e3

Published: June 20, 2023

Cephalopods are highly visual animals with camera-type eyes, large brains, and a rich repertoire of visually guided behaviors. However, the cephalopod brain evolved independently from those other species, such as vertebrates; therefore, neural circuits that process sensory information profoundly different. It is largely unknown how their powerful but unique system functions, there have been no direct measurements responses in brain. In this study, we used two-photon calcium imaging to record evoked primary processing center octopus central brain, optic lobe, determine basic features scene represented organized. We found spatially localized receptive fields for light (ON) dark (OFF) stimuli, which were retinotopically organized across demonstrating hallmark organization shared many species. An examination these revealed transformations representation layers including emergence OFF pathway increased size selectivity. also identified asymmetries spatial ON suggest circuit mechanisms form may suit specific demands an underwater scene. This study provides insight into functional system, highlighting both aspects, lays foundation future studies mediate behavior cephalopods.

Language: Английский

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