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Suvi Karjalainen

@suvikarjalainen

🧠 Postdoctoral researcher | PhD | Psychologist 🏒 University of JyvΓ€skylΓ€, Finland πŸ” Body-brain interaction, neurodiversity, mental health

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Latest posts by Suvi Karjalainen @suvikarjalainen

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Today I am excited to introduce respyra - an open-source Python toolbox for respiratory tracking experiments in interoception research!

Now on PyPI (pip install respyra) with a preprint on PsyArXiv:
osf.io/preprints/ps...

GitHub: github.com/embodied-com...

27.02.2026 12:55 πŸ‘ 98 πŸ” 25 πŸ’¬ 2 πŸ“Œ 2

Body and brain signalling during naturalistic learning situations https://www.biorxiv.org/content/10.64898/2026.01.09.698657v1

11.01.2026 05:15 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Body and brain signalling during naturalistic learning situations A central challenge in supporting learning and designing learning environments is to understand individual differences in learning experiences. However, despite growing interest in examining learning ...

New preprint! πŸ§ πŸ«€

Combining #EEG and #HRV, we examined how students' and instructors' cardiac and brain activity varied across the progression of a naturalistic learning situation in aviation and forestry contexts.

@uniofjyvaskyla.bsky.social @tiinapa.bsky.social #neuroskyence

12.01.2026 12:25 πŸ‘ 9 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
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WARN-D machine learning competition is live Β» Eiko Fried If you share one single thing of our team in 2026β€”on social media or per email with your colleaguesβ€”please let it be this machine learning competition. It was half a decade of work to get here, especi...

After 5 years of data collection, our WARN-D machine learning competition to forecast depression onset is now LIVE! We hope many of you will participateβ€”we have incredibly rich data.

If you share a single thing of my lab this year, please make it this competition.

eiko-fried.com/warn-d-machi...

07.01.2026 19:39 πŸ‘ 187 πŸ” 159 πŸ’¬ 5 πŸ“Œ 5
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various computational neuroscience / MEEG / LFP short courses and summer schools

πŸ“† updated for 2026!

list of summer schools & short courses in the realm of (computational) neuroscience or data analysis of EEG / MEG / LFP: πŸ”— docs.google.com/spreadsheets...

19.12.2025 16:37 πŸ‘ 100 πŸ” 60 πŸ’¬ 3 πŸ“Œ 0
Redirecting

Very proud to announce that the final chapter of my thesis is now out in Cell Reports! How do neurophysiological traits that characterize individuals evolve across the lifespan? We combined data from over 1,000 individuals aged 4–89 to answer this question. (1/6) πŸ§ πŸ‘ΆπŸ‘¦πŸ‘§πŸ‘±πŸ‘©β€πŸ¦±πŸ§”β€β™‚οΈπŸ§“πŸ‘΄
doi.org/10.1016/j.ce...

15.12.2025 14:42 πŸ‘ 15 πŸ” 8 πŸ’¬ 1 πŸ“Œ 2
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πŸ“£ New Event!

🧠 #turkubrainandmind is collaborating with JyvÀskylÀ Brain & Mind to host a BrainBreak webinar on Big Data in Brain & Biobank Research.

πŸ“… January 19, 2026
⏰ 3:00 PM - 4:00 PM
🌐 Online (Zoom)

Register here: buff.ly/v45DLPn

@uniofjyvaskyla.bsky.social
@utu.fi
#brainbreak

16.12.2025 12:17 πŸ‘ 1 πŸ” 1 πŸ’¬ 1 πŸ“Œ 1
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Physical proximity, social familiarity, and acoustic environment modulate heart rate synchrony in real-world social interactions Human social behaviour unfolds in complex real-world environments shaped by social and acoustic factors, yet markers of social engagement and connection remain elusive. Interpersonal physiological syn...

πŸ«€ New preprint alert! πŸŒ†
Thrilled to share the first paper of my PhD on heart-rate synchrony during social interactions in urban environments. @sinelabdtu.bsky.social
www.biorxiv.org/content/10.6...

07.12.2025 08:57 πŸ‘ 17 πŸ” 6 πŸ’¬ 2 πŸ“Œ 3
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New preprint: "Bodily Rhythms Gate Action–Perception Coupling"

Cardiorespiratory cycles gate when it's best to sense & act on the world, shaping when precision peaks

Active sensing + Interoception + Active inference 🧠

πŸ”— bit.ly/3MinQIi

w/ @micahgallen.com; Lucas Naranjo; @jameskilner.bsky.social

09.12.2025 08:13 πŸ‘ 49 πŸ” 20 πŸ’¬ 3 πŸ“Œ 4
Stylized logo of the MindBrainBody Symposium

Stylized logo of the MindBrainBody Symposium

*13th MindBrainBody Symposium*

πŸ“† Mar 9-11, 2026
🏠 #Berlin & virtual
(deadline: Jan 8, 2026)

Keynotes:
- @ulrikebingel.bsky.social
- Karl Friston (online)
- @tinalonsdorf.bsky.social
- Sonja Kotz
- Julian Thayer

...& so much more: prizes, posters, talks, food, drinks, encounters.

Let's meet!

01.12.2025 07:28 πŸ‘ 41 πŸ” 29 πŸ’¬ 1 πŸ“Œ 5
Recording setup and data analysis. Top left panel: Schematic of the position of the electrodes to record EEG (white), ESI (black), ECG (red), somatosensory activity at Erb’s points (green), and the positions of Common Mode Sense (CMS) (blue) and DRL (orange) electrodes. Note that Erb and ECG electrodes were placed on the chest, while ESI electrodes were placed on the back. Top right and bottom panels: Flowchart describing the analysis procedure. (1 and 2) Raw ESI signals are first re-referenced to the most caudal dorsal electrode (S64). (3) The artifact caused by the electrical stimulation of the median nerve is removed by linear interpolation. (4) The ECG is used to identify ESI time windows contaminated by the QRS complex (orange). This allows subsequent selection of ESI time windows to retain. (5) These time windows are epoched around the somatosensory stimulus. (6) An amplitude-based threshold is used to identify and remove artifactual epochs (red). (7) Resulting artifact-free epochs are averaged across stimuli of each block. Subject-level average waveforms are subsequently averaged across participants. (8) Images of the spatial distribution of spinal cord activity are calculated by spline interpolation across ESI electrodes. The figurine depicts spinal cord activity at the latency of the N13 wave.

Recording setup and data analysis. Top left panel: Schematic of the position of the electrodes to record EEG (white), ESI (black), ECG (red), somatosensory activity at Erb’s points (green), and the positions of Common Mode Sense (CMS) (blue) and DRL (orange) electrodes. Note that Erb and ECG electrodes were placed on the chest, while ESI electrodes were placed on the back. Top right and bottom panels: Flowchart describing the analysis procedure. (1 and 2) Raw ESI signals are first re-referenced to the most caudal dorsal electrode (S64). (3) The artifact caused by the electrical stimulation of the median nerve is removed by linear interpolation. (4) The ECG is used to identify ESI time windows contaminated by the QRS complex (orange). This allows subsequent selection of ESI time windows to retain. (5) These time windows are epoched around the somatosensory stimulus. (6) An amplitude-based threshold is used to identify and remove artifactual epochs (red). (7) Resulting artifact-free epochs are averaged across stimuli of each block. Subject-level average waveforms are subsequently averaged across participants. (8) Images of the spatial distribution of spinal cord activity are calculated by spline interpolation across ESI electrodes. The figurine depicts spinal cord activity at the latency of the N13 wave.

The role of the #SpinalCord in relaying brain-body signals has been hard to study noninvasively. @giuliog.bsky.social &co develop Electrical Spinal Imaging (ESI), enabling high-resolution, noninvasive recordings, revealing how #attention modulates spinal activity @plosbiology.org πŸ§ͺ plos.io/3MswZOf

28.11.2025 17:25 πŸ‘ 16 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
Exemplary analysis pipeline for respiratory data

Exemplary analysis pipeline for respiratory data

'Robust circular cluster-based statistics
for respiration-brain coupling'

New preprint, and what a way to welcome @teresaberther.bsky.social to the #neuroskyence community. With @eliobalestrieri.bsky.social, she developed CBPT for circular #bodybrain analyses.

Paper: osf.io/preprints/ps...

πŸ§΅πŸ”½

26.11.2025 15:15 πŸ‘ 49 πŸ” 17 πŸ’¬ 2 πŸ“Œ 2

** Recruiting a postdoc ** We are looking for a postdoc to work on emotion, mental health, and interoception, based in London at @ucl.ac.uk in my lab (Clinical and Affective Neuroscience). Part of a large Wellcome Grant (co-led with the brilliant @camillanord.bsky.social)

24.11.2025 12:22 πŸ‘ 86 πŸ” 87 πŸ’¬ 1 πŸ“Œ 1

πŸ₯³πŸ‘

17.11.2025 07:31 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Transparent and comprehensive statistical reporting is critical for ensuring the credibility, reproducibility, and interpretability of psychological research. This paper offers a structured set of guidelines for reporting statistical analyses in quantitative psychology, emphasizing clarity at both the planning and results stages. Drawing on established recommendations and emerging best practices, we outline key decisions related to hypothesis formulation, sample size justification, preregistration, outlier and missing data handling, statistical model specification, and the interpretation of inferential outcomes. We address considerations across frequentist and Bayesian frameworks and fixed as well as sequential research designs, including guidance on effect size reporting, equivalence testing, and the appropriate treatment of null results. To facilitate implementation of these recommendations, we provide the Transparent Statistical Reporting in Psychology (TSRP) Checklist that researchers can use to systematically evaluate and improve their statistical reporting practices (https://osf.io/t2zpq/). In addition, we provide a curated list of freely available tools, packages, and functions that researchers can use to implement transparent reporting practices in their own analyses to bridge the gap between theory and practice. To illustrate the practical application of these principles, we provide a side-by-side comparison of insufficient versus best-practice reporting using a hypothetical cognitive psychology study. By adopting transparent reporting standards, researchers can improve the robustness of individual studies and facilitate cumulative scientific progress through more reliable meta-analyses and research syntheses.

Transparent and comprehensive statistical reporting is critical for ensuring the credibility, reproducibility, and interpretability of psychological research. This paper offers a structured set of guidelines for reporting statistical analyses in quantitative psychology, emphasizing clarity at both the planning and results stages. Drawing on established recommendations and emerging best practices, we outline key decisions related to hypothesis formulation, sample size justification, preregistration, outlier and missing data handling, statistical model specification, and the interpretation of inferential outcomes. We address considerations across frequentist and Bayesian frameworks and fixed as well as sequential research designs, including guidance on effect size reporting, equivalence testing, and the appropriate treatment of null results. To facilitate implementation of these recommendations, we provide the Transparent Statistical Reporting in Psychology (TSRP) Checklist that researchers can use to systematically evaluate and improve their statistical reporting practices (https://osf.io/t2zpq/). In addition, we provide a curated list of freely available tools, packages, and functions that researchers can use to implement transparent reporting practices in their own analyses to bridge the gap between theory and practice. To illustrate the practical application of these principles, we provide a side-by-side comparison of insufficient versus best-practice reporting using a hypothetical cognitive psychology study. By adopting transparent reporting standards, researchers can improve the robustness of individual studies and facilitate cumulative scientific progress through more reliable meta-analyses and research syntheses.

Our paper on improving statistical reporting in psychology is now online πŸŽ‰

As a part of this paper, we also created the Transparent Statistical Reporting in Psychology checklist, which researchers can use to improve their statistical reporting practices

www.nature.com/articles/s44...

14.11.2025 20:43 πŸ‘ 235 πŸ” 94 πŸ’¬ 8 πŸ“Œ 5
Beyond the buzz: Grounding interoceptive interventions in mechanisms of brain–body coupling The field of interoception research is growing at a rapid pace. This Perspective highlights why establishing both mechanistic insight and construct validity will be critical prerequisites for developi...

New perspective paper out now in @plosbiology.org with a few thoughts on #interoception: What it is (or rather is not), how it can inform therapeutic interventions, and where (we think) the field of brain-body #neuroskyence has yet to find more solid ground to build on.

doi.org/10.1371/jour...

14.11.2025 07:39 πŸ‘ 24 πŸ” 16 πŸ’¬ 1 πŸ“Œ 1

So happy this paper is now out in @plosbiology.org! We investigated whether fluctuations in MEPs can be explained by phasic influences from internal bodily rhythms, and whether this might happen independently per organ system.
#interoception #neuroskyence

13.11.2025 11:01 πŸ‘ 64 πŸ” 27 πŸ’¬ 2 πŸ“Œ 0
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Imagined movement increases the segregation of brain-heart networks Understanding the mechanisms of motor imagery, the mental simulation of movement without execution, is key for the development of neurotechnologies. For instance, for detecting covert motor intent in ...

More on the link brain-heart axis and sensorimotor function, relevant for BCI research πŸ€–: Different bodily rhythms are coupled with cortical regions at rest. Here we show that motor imagery triggers a decoupling of cardiac dynamics with motor cortex functional connectivity πŸ§ πŸ«€ doi.org/10.1101/2025...

04.11.2025 13:28 πŸ‘ 20 πŸ” 11 πŸ’¬ 0 πŸ“Œ 1
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How does mindfulness change body awareness? Excited to share our meta-analysis on mindfulness training and #interoception. www.nature.com/articles/s41...

07.11.2025 13:50 πŸ‘ 9 πŸ” 7 πŸ’¬ 1 πŸ“Œ 1
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Investigating the relationship between cardiac interoceptive accuracy and stress: A systematic review and meta-analysis Interoceptive accuracy, the ability to correctly perceive internal body signals such as heartbeats, has been empirically and theoretically linked to s…

New paper just accepted in NBBR investigating the relationship between cardiac interoceptive accuracy and stress. Some relationships....but it’s complicated! One area where how we measure both interoception and stress really matters. www.sciencedirect.com/science/arti...

03.11.2025 19:10 πŸ‘ 3 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0
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πŸ“£ Out in TINS (@cp-trendsneuro.bsky.social):

Neural processing is often described as either externally or internally directed. In our new Forum article, we (@freekvanede.bsky.social & Kia Nobre) propose a multilevel framework for conceptualising external and internal continua of brain processes.

19.10.2025 07:44 πŸ‘ 36 πŸ” 16 πŸ’¬ 1 πŸ“Œ 2
Logo of the MindBrainBody Symposium

Logo of the MindBrainBody Symposium

Nice things for the

**13th #MindBrainBody Symposium 2026**

happening under the hood 😊

Save the date: πŸ“† March 9-11, 2026 (Berlin and virtual)

Stay tuned for the call and announcement!

(For info about the last 12 MBBSymposia: mindbrainbody.de)

#interoception #neuroskyence

17.10.2025 09:39 πŸ‘ 32 πŸ” 10 πŸ’¬ 1 πŸ“Œ 0
schematic of fetal OPM-MEG

schematic of fetal OPM-MEG

πŸ“ˆπŸ§  We're looking for brains! πŸ§ πŸ“ˆ
Postdoc + PhD positions are available to help pioneer fetal MEG with optically pumped magnetometers, measuring prenatal responses to sound and light to understand how we start making sense of the world even before we're born. 🐣

Please get in touch to hear more!

08.10.2025 14:27 πŸ‘ 58 πŸ” 38 πŸ’¬ 3 πŸ“Œ 5

I'm thrilled to share that our new paper is now published in Psychophysiology (Open Access):
onlinelibrary.wiley.com/doi/10.1111/...

@zacndr.bsky.social @teamlabuda.bsky.social @fraferri.bsky.social @danlikesbrains.bsky.social

26.09.2025 08:25 πŸ‘ 35 πŸ” 17 πŸ’¬ 1 πŸ“Œ 0

In some way, it's trivial:

The #brain & the rest of the #body (e.g. the #heart) are coupled.

Yet, we spelled it out
w/ A. Villringer & V. Nikulin for current scientists (below)
w/ @martager.bsky.social @agatapatyczek.bsky.social @el-rei.bsky.social for future scientists bsky.app/profile/mart...

25.09.2025 07:43 πŸ‘ 51 πŸ” 20 πŸ’¬ 0 πŸ“Œ 1
Villringer et al. Figure 1. Conceptual framework for brain–body states

Villringer et al. Figure 1. Conceptual framework for brain–body states

Villringer et al. Figure 2 Brain–body micro-, meso-, and macro-states can be distinguished on the basis of their duration and reversibility

Villringer et al. Figure 2 Brain–body micro-, meso-, and macro-states can be distinguished on the basis of their duration and reversibility

'Brain–body states as a link between cardiovascular and mental health'

by Arno Villringer, Vadim Nikulin & Michael Gaebler @mbe-lab.bsky.social @michaelgaebler.com @mpicbs.bsky.social sky.social

www.cell.com/trends/neuro...

23.09.2025 20:13 πŸ‘ 36 πŸ” 13 πŸ’¬ 1 πŸ“Œ 2
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Frontiers | AffectTracker: real-time continuous rating of affective experience in immersive virtual reality Subjective experience is key to understanding affective states, characterized by valence and arousal. Traditional experiments using post-stimulus summary rat...

πŸ“’Our peer-reviewed article about the AffectTracker is finally out! πŸ˜²πŸ•ΉοΈπŸ“ˆ
Traditional methods for rating emotion often miss the dynamic, moment-to-moment nature of feelings. We designed a tool to capture this continuous affective experience in real-time during dynamic emotional stimulation.

23.09.2025 10:20 πŸ‘ 43 πŸ” 14 πŸ’¬ 2 πŸ“Œ 2
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Tervetuloa Tutkijoiden yΓΆhΓΆn!

🧠 Muuttuvat aivot
πŸ•› 26.9. 16.00-21.00
πŸ“ Alfa, Agora, @uniofjyvaskyla.bsky.social

#TutkijoidenYΓΆ #ResearchersNight #Tiedetaivas

23.09.2025 09:54 πŸ‘ 10 πŸ” 2 πŸ’¬ 1 πŸ“Œ 2
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The Body’s Band: How Heart and Brain Communicate Illustration of a person with vitiligo practicing yoga, sitting cross-legged and stretching an arm over their head. In a thought bubble, a smiling brain sings into a microphone and a heart plays a dru...

πŸ§ πŸ«€ New from our lab on Frontiers for Young Minds:

Ever wondered how the heart and brain communicate? Think the heart as the drummer πŸ₯ & the brain as the singer 🎀 keeping the body's band in tune!

Read here (for ages 8–15): kids.frontiersin.org/articles/10.3389/frym.2025.1536787/full
[1/2]

12.09.2025 08:20 πŸ‘ 15 πŸ” 14 πŸ’¬ 1 πŸ“Œ 1
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The effect of the β€œexposome” on developmental brain health and cognitive outcomes Neuropsychopharmacology - The effect of the β€œexposome” on developmental brain health and cognitive outcomes

Absolutely thrilled to share the 🌟 FIRST PAPER 🌟 from ACORN Lab! 🐿️ I’m beyond proud of all-star grad student @heatherarobinson.bsky.social for this review of β€œexposome” effects on neurodevelopment & cognition! Paper here rdcu.be/ezUqx & thread below πŸ‘‡ /1

#neuroskyence #PsychSciSky #devsky #cogdev

08.08.2025 16:22 πŸ‘ 70 πŸ” 33 πŸ’¬ 4 πŸ“Œ 1