Behaviourally modulated hippocampal theta oscillations in the ferret persist during both locomotion and immobility
Open accessAbstract
Theta oscillations are a hallmark of hippocampal activity across mammals and play a critical role in many hippocampal models of memory and spatial navigation. To reconcile the cross-species differences observed in the presence and properties of theta, we recorded hippocampal local field potentials in rats and ferrets during auditory and visual localisation tasks designed to vary locomotion and sensory attention. Here, we show that theta oscillations occur during locomotion in both ferrets and rats, however during periods of immobility, theta oscillations persist in the ferret, contrasting starkly with the switch to large irregular activity (LIA) in the rat. Theta during immobility in the ferret is identified as analogous to Type 2 theta that has been observed in rodents due to its sensitivity to atropine, and is modulated by behavioural state with the strongest theta observed during reward epochs. These results demonstrate that even under similar behavioural conditions, differences exist between species in the relationship between theta and behavioural state.
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Classical work in rodents demonstrated two mechanistically distinct types of theta oscillations: fast Type-1 (atropine-insensitive) theta oscillations (7-11 Hz) during locomotion, and slower Type-2 (atropine-sensitive) oscillations (4-7 Hz) thought to occur preferentially during immobility.
“Classical work in rodents has demonstrated the existence of two mechanistically distinct types of theta oscillations: fast Type-1 (atropine-insensitive) theta oscillations (7–11 Hz), which are observed during locomotion, and slower Type-2 (atropine-sensitive) oscillations (4–7 Hz), which are thought to preferentially occur during immobility26–28,42,50,97.”
From Place and behavioral modulation of hippocampal neurons during immobility (2026) · cites this paper as [50]
The Introduction (page unavailable) describes two types of rat theta with distinct behavioural correlates and pharmacology: atropine-resistant Type 1 during locomotion and atropine-sensitive Type 2 during immobility at 4–7 Hz. It says Type 1 is faster than Type 2, but does not give the claimed 7–11 Hz range for Type 1 or explicitly establish that the two rodent types arise from distinct mechanisms. (LLM, conf=0.85)
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Self-citation
Flagged first, then by citations
Research works printed but not linked: 1
- [107]Paxinos, G. & Watson, C. The Rat Brain in Stereotaxic Coordinates. (Elsevier Academic Press, 2005).
Cited by
Sorted by citations
Place and behavioral modulation of hippocampal neurons during immobility
Sartorato, N., Zouridis, I. S., Narantsatsralt, U.-U., Blanco-Hernández, E., & Burgalossi, A. (2026) · Nature Communications · doi:10.1038/s41467-026-75492-w · Cited by 1 · see citing works
- Authors
- Dunn, S. L. S., Town, S. M., Bizley, J. K., & Bendor, D.
- Affiliations
- University College London (GB)
- Corresponding author
- Dunn, Soraya L. S.
- Venue
- Nature Communications
- Published
- 2022-10-07
- Volume
- 13
- Issue
- 1
- Pages
- 5905-5905
- ISSN
- 2041-1723 (ISSN-L)
- PMC
- PMC9547075
- OpenAlex
- W4303022253
- Cited by
- 17
- References
- 104
- Citations by year
- 2026: 3 · 2025: 4 · 2024: 3 · 2023: 5 · 2022: 2
- FWCI
- 1.81
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Nature Communications (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Wellcome Trust (098418/Z/12/Z)
- Biotechnology and Biological Sciences Research Council (BB/R004420/1)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Keywords
- hippocampal theta oscillations, behavioral state, locomotion, immobility, atropine sensitivity, sound localization, visual localization, reward, rats, ferrets, local field potentials
- MeSH terms
- Animals, Atropine, Ferrets, Hippocampus, Locomotion, Theta Rhythm, Rats
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