Evidence map›Paper›PMID 31748237›Full record

ArticleeNeuro

Spreading Depolarizations Occur in Mild Traumatic Brain Injuries and Are Associated with Postinjury Behavior.

Johann M Pacheco, Ashlyn Hines-Lanham, Claire Stratton, Carissa J Mehos, Kathryn E McCurdy, Natalie J Pinkowski, Haikun Zhang, C William Shuttleworth, Russell A Morton

Open access · goldAbstract read
In one paragraph

Article in eNeuro. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
2.1field-weighted citation impact, top 13% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 39 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 1 institution in 1 country.

Johann M PachecoDepartment of Neurosciences, University of New Mexico School of Medicine, Albuquerque, NM 87131.
Ashlyn Hines-LanhamDepartment of Neurosciences, University of New Mexico School of Medicine, Albuquerque, NM 87131.
Claire StrattonDepartment of Neurosciences, University of New Mexico School of Medicine, Albuquerque, NM 87131.
Carissa J MehosDepartment of Neurosciences, University of New Mexico School of Medicine, Albuquerque, NM 87131.
Kathryn E McCurdyDepartment of Neurosciences, University of New Mexico School of Medicine, Albuquerque, NM 87131.
Natalie J PinkowskiDepartment of Neurosciences, University of New Mexico School of Medicine, Albuquerque, NM 87131.
Haikun ZhangDepartment of Neurosciences, University of New Mexico School of Medicine, Albuquerque, NM 87131.
C William ShuttleworthDepartment of Neurosciences, University of New Mexico School of Medicine, Albuquerque, NM 87131.
Russell A MortonDepartment of Neurosciences, University of New Mexico School of Medicine, Albuquerque, NM 87131 ramorton@salud.unm.edu.
University of New Mexico · US

Funding

University of New Mexico (UNM) Center for Brain Recovery and RepairP20GM109089 · NIGMS · UNIVERSITY OF NEW MEXICO HEALTH SCIS CTR · PI SHUTTLEWORTH, CLAUDE W · 2015 to 2024
$22.7M
Spreading Depolarizations and Neuronal VulnerabilityR01NS106901 · NINDS · UNIVERSITY OF NEW MEXICO HEALTH SCIS CTR · PI Claude W Shuttleworth · 2018 to 2026
$2.5M
NIGMS NIH HHS P20 GM109089NINDS NIH HHS R01 NS106901
6 · The paper itself

Abstract

Millions of people suffer mild traumatic brain injuries (mTBIs) every year, and there is growing evidence that repeated injuries can result in long-term pathology. The acute symptoms of these injuries may or may not include the loss of consciousness but do include disorientation, confusion, and/or the inability to concentrate. Most of these acute symptoms spontaneously resolve within a few hours or days. However, the underlying physiological and cellular mechanisms remain unclear. Spreading depolarizations (SDs) are known to occur in rodents and humans following moderate and severe TBIs, and SDs have long been hypothesized to occur in more mild injuries. Using a closed skull impact model, we investigated the presence of SDs immediately following a mTBI. Animals remained motionless for multiple minutes following an impact and once recovered had fewer episodes of movement. We recorded the defining electrophysiological properties of SDs, including the large extracellular field potential shifts and suppression of high-frequency cortical activity. Impact-induced SDs were also associated with a propagating wave of reduced cerebral blood flow (CBF). In the wake of the SD, there was a prolonged period of reduced CBF that recovered in approximately 90 min. Similar to SDs in more severe injuries, the impact-induced SDs could be blocked with ketamine. Interestingly, impacts at a slower velocity did not produce the prolonged immobility and did not initiate SDs. Our data suggest that SDs play a significant role in mTBIs and SDs may contribute to the acute symptoms of mTBIs.

Indexed as

AnimalsApoptosisBehavior, AnimalBrainBrain ConcussionCerebrovascular CirculationConditioning, ClassicalCortical Spreading DepressionFearFemaleGaitLearningMaleMiceModels, AnimalMotor Activitycerebral blood flowclosed skull impactconcussioncortical spreading depressionelectrophysiologylaser speckle contrast imaging

Identifiers

PMID31748237
PMCPMC6893232
OpenAlexW2989946708

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.