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practiCal fMRI @practicalfmri.bsky.social · 5d

The autonomic nervous system? A cyclic in sympathetic nervous activity should cause respiratory and EDA changes, plus muscle tone changes, etc.

practiCal fMRI @practicalfmri.bsky.social · 6d

A bit outside my expertise, but I’d start by looking at cyclic changes in arousal. Breathing will likely reflect the same processes.
I think it may be tantamount to asking why breathing rate & depth ever change during rest. Presumably it’s autonomic?

practiCal fMRI @practicalfmri.bsky.social · 8d

Not sure it’s a wise approach if ASL is available. Then again, lag maps via RapidTide are of their own benefit & return useful values even with v long latency of severely compromised vasculature.

Predicting Regional Cerebral Blood Flow Using Voxel-Wise Resting-State Functional MRI - PubMed

practiCal fMRI @practicalfmri.bsky.social · 8d

Predicting Regional Cerebral Blood Flow Using Voxel-Wise Resting-State Functional MRI
pubmed.ncbi.nlm.nih.gov/41008269/

Background: Regional cerebral blood flow (rCBF) is a putative biomarker for neuropsychiatric disorders, including major depressive disorder (MDD). Methods: Here, we show that rCBF ...

Weighing brain activity with the balance: Angelo Mosso's original manuscripts come to light - PubMed

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Reposted by practiCal fMRI

Imaging Neuroscience @imagingneurosci.bsky.social · 12d

New paper in Imaging Neuroscience by Roza G. Bayrak, Catie Chang, et al:

DeepPhysioRecon: Tracing peripheral physiology in low frequency fMRI dynamics

doi.org/10.1162/IMAG...

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practiCal fMRI @practicalfmri.bsky.social · 12d

Thinking about Angelo Mosso's brain balance method recently. There was a confound not mentioned in a 2014 review (pubmed.ncbi.nlm.nih.gov/23687118/). Blood is 1.06 X water density, but CSF will be forced out of the ventricles as CBV increases (Monro-Kellie doctrine) so net weight sensitivity is low.

Neuroimaging techniques, such as positron emission tomography and functional magnetic resonance imaging are essential tools for the analysis of organized neural systems in working and resting states, ...

practiCal fMRI @practicalfmri.bsky.social · 14d

Hm, not sure it's a test of ingenuity. A stress test, maybe. Or a sanity check. Trial by ordeal, something like that. Bloke named Sisyphus on your corporate board by any chance...?

Brain thermal response to low intensity focused ultrasound at the action potential level and neuron response to various stimulus - PubMed

practiCal fMRI @practicalfmri.bsky.social · 14d

Testing Bluesky reply functionality… Please ignore! Must be a MicroShaft retribution function or something.

practiCal fMRI @practicalfmri.bsky.social · 14d

Any organization that chooses MS operating systems or software for their critical systems - looking at you, Siemens! - should be dismantled on humanitarian grounds.

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practiCal fMRI @practicalfmri.bsky.social · 14d

What is Outlook?

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practiCal fMRI @practicalfmri.bsky.social · 15d

Brain thermal response to low intensity focused ultrasound at the action potential level and neuron response to various stimulus

pubmed.ncbi.nlm.nih.gov/40967140/

Ultrasound neuromodulation is a non-invasive technique that modulates neuronal activity through energy transfer or mechanical effects. Understanding how focused ultrasound (FUS) influences neuronal st...

Rapid Tissue-CSF Water Exchange in the Human Brain Revealed by Magnetization Transfer Indirect Spin Labeling - PubMed

practiCal fMRI @practicalfmri.bsky.social · 16d

Really interesting info relevant to magnet safety: mriquestions.com/most-dangero...

Spatial gradient field

Field plots MRI

mriquestions.com

practiCal fMRI @practicalfmri.bsky.social · 16d

Yes. All the more reason for Brits to resist the stupidity while they still can. It’s very difficult once the muppets are in power.

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practiCal fMRI @practicalfmri.bsky.social · 16d

Seconded. I’m a naturalized US citizen, also white and English, and yet I’m no longer assuming I won’t need to gtfoh, or be thrown out.

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practiCal fMRI @practicalfmri.bsky.social · 16d

Interesting approach to tissue-CSF water exchange, but someone please tell me how MT on/off difference images aren't affected by cardiac pulsatility in the perivascular spaces & lateral ventricles. How could we prove/disprove local motion effects?

pubmed.ncbi.nlm.nih.gov/40950437/

MISL enables robust, non-invasive mapping of tissue-CSF exchange with high sensitivity and spatial resolution. It offers a unique window into tissue-CSF dynamics, with potential applications in PVS vi...

Ultrasound system for precise neuromodulation of human deep brain circuits - PubMed

practiCal fMRI @practicalfmri.bsky.social · 17d

For me it’s often what a paper fails to say that is my main takeaway. If I had a penny for every MRI paper that fails to mention the effects of motion or systemic physiology I’d be a wealthy man! When does AI begin to spot critical omissions?

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practiCal fMRI @practicalfmri.bsky.social · 28d

Ultrasound system for precise neuromodulation of human deep brain circuits
pubmed.ncbi.nlm.nih.gov/40913042/

We introduce an advanced transcranial ultrasound stimulation (TUS) system for precise deep brain neuromodulation, featuring a 256-element helmet-shaped transducer array (555 kHz), stereotactic positio...

Assistant Professor of Psychology - Human Cognition or Cognitive Neuroscience

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Reposted by practiCal fMRI

Charan Ranganath @charan-neuro.bsky.social · Sep 8

We are looking for our next colleague. Feel free to reach out to me if you have questions!

Yuko Munakata @yukomunakata.bsky.social · Sep 8

UC Davis is hiring! A tenure-track assistant professor of psychology, in human cognition or cognitive neuroscience #psychjobs recruit.ucdavis.edu/JPF07300

University of California, Davis is hiring. Apply now!

recruit.ucdavis.edu

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Reposted by practiCal fMRI

bioRxiv Biophysics @biorxiv-biophys.bsky.social · Sep 4

Greater cardiorespiratory fitness is associated with higher cerebral blood flow and lower oxygen extraction fraction in healthy older adults https://www.biorxiv.org/content/10.1101/2025.08.29.673075v1

Reposted by practiCal fMRI

bioRxiv Neuroscience @biorxiv-neursci.bsky.social · Sep 5

Functional imaging of hippocampal layers using VASO and BOLD on the Next Generation (NexGen) 7T Scanner https://www.biorxiv.org/content/10.1101/2025.08.29.673151v1

Functional MRI signatures of autonomic physiology in aging - PubMed

Reposted by practiCal fMRI

bioRxiv Neuroscience @biorxiv-neursci.bsky.social · Sep 5

Update on the reproduction and interpretation of DIANA fMRI https://www.biorxiv.org/content/10.1101/2025.08.31.673005v1

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practiCal fMRI @practicalfmri.bsky.social · Sep 3

Functional MRI signatures of autonomic physiology in aging.

pubmed.ncbi.nlm.nih.gov/40858848/

While traditionally regarded as "noise", blood-oxygenation-level-dependent (BOLD) functional Magnetic Resonance Imaging (fMRI) fluctuations coupled to systemic physiology-such as heart rate and respir...

practiCal fMRI @practicalfmri.bsky.social · Sep 2

And it’s why one should first determine the true goal(s) before committing to a method.