#vagal

2025-03-25

Flavien décolle (enfin) vers la Nouvelle-Zélande

Après 18 mois sur l'île d'Amsterdam, un périple en Amérique du Sud, un autre lieu incontournable l'attire. Une gestation de neuf mois, avant le grand départ. Un périple à la découverte de la faune et de la flore des dernières îles subantarctiques inconnues pour Flavien.

Des découvertes, des aventures et des souvenirs viennent remplir ses rêves. Au pays des All-Blacks et du Kiwi, il rêve éveillé. Un départ remit en question maintes fois. Puis, Flavien part de Lavausseau le 9 décembre 2024. Le timing serré ne souffre d'aucuns à peu près. Le trajet en train jusqu'à l'aéroport Roissy Charles de Gaulle, se passe sans accrocs. Sauf qu'une petite syncope vasovagale (malaise vagal) à failli tout remettre en question, une dernière fois. Comme quoi la vie ne tient toujours qu'à un fil.

librexpression.fr/un-nouveau-d

librexpression.fr/mon-delicieu

(Crédits : Flavien Saboureau)

#aeroports #antarctique #chine #flavien #france #librexpression #nouvellezelande #paris #poitiers #rpc #shanghai #trek #vagal #vol

La vue des îles composant la Nouvelle-Zélande à travers un hublot d'avion.
2025-02-25

I'm out of the clinical game (many years now), and so I'm out of all the loops. I'm getting CE invitations to learn about something called "polyvagal theory", apparently (?) asserting that vagal responses (or polyvagal? IDK) are involved in, and can ameliorate, psychological disorders.

Before I do a deep dive, does anyone have a one-sentence summary of what this is?

#request #psychology #polyvagal #vagal #therapy #counseling #psychotherapy #continuingEducation #information

Carsen Stringer (she/her)computingnature@neuromatch.social
2023-11-01

Jonny Lovelace, Jingrui Ma, ... and Vinny Augustine discovered the vagal pathway underlying fainting, really exciting work, summarized here: nature.com/articles/d41586-023 , full paper here: nature.com/articles/s41586-023 (I helped a little w/ neural analyses)

When the mouse faints, its eyes roll back and most neurons across the brain *shut off completely* (at yellow line in first figure, shows one example #neuropixels recording). But neurons in the hypothalamic PVZ increased their firing during this time period (first group in the second figure). These neurons were causally implicated: inhibition increased fainting duration while excitation increased arousal.

#neuroscience #syncope #fainting #vagal #discovery

Neuropixels recordings during induction of mouse fainting thru vagal stimulation. Neural activity raster, sorted by rastermap, shows a significant decrease in activity after fainting -- shown by the yellow line.Neurons from all recordings, shown during fainting (aka syncope). Neurons in the PVZ increased their activity while most other neurons were suppressed
2023-10-17

Full text study from Cell - cell.com/cell/fulltext/S0092-8
>#LongCOVID is associated with reduced circulating #serotonin levels
>Serotonin depletion is driven by viral #RNA-induced type I #interferons (IFNs)
>IFNs reduce serotonin through diminished# tryptophan uptake and #hypercoagulability
>Peripheral serotonin deficiency impairs #cognition via reduced #vagal signaling

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