Evidence map›Paper›PMID 25789412›Full record

ArticleJournal of neurotrauma2015

Increased Network Excitability Due to Altered Synaptic Inputs to Neocortical Layer V Intact and Axotomized Pyramidal Neurons after Mild Traumatic Brain Injury.

Anders Hånell, John E Greer, Kimberle M Jacobs

Abstract read
In one paragraph

Article in Journal of neurotrauma, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

22 citing papers in PubMed, 26 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

3 authors at 1 institution in 1 country.

Anders Hånell1 Department of Anatomy and Neurobiology, Virginia Commonwealth University , Richmond, Virginia.
John E Greer2 Department of Neurosurgery, Virginia Commonwealth University , Richmond, Virginia.
Kimberle M Jacobs1 Department of Anatomy and Neurobiology, Virginia Commonwealth University , Richmond, Virginia.
Virginia Commonwealth University · US

Funding

Mild Traumatic Brain Injury Alters Interneuron Structure and FunctionR01NS077675 · NINDS · VIRGINIA COMMONWEALTH UNIVERSITY · PI JOHN GREER, KIMBERLE Mae JACOBS · 2011 to 2026
$6.7M
NINDS NIH HHS NS077675NINDS NIH HHS R01 NS077675
6 · The paper itself

Abstract

Mild traumatic brain injury (mTBI) can produce long lasting cognitive dysfunction. There is typically no cell death and only diffuse structural injury after mTBI. Thus, functional changes in intact neurons may contribute to symptoms. We have previously shown altered intrinsic properties of axotomized and intact neurons within 2 d after a central fluid percussion injury in mice expressing yellow fluorescent protein (YFP) that allow identification of axonal state prior to recording. Here, whole-cell patch clamp recordings were used to examine synaptic properties of YFP(+) layer V pyramidal neurons. An increased frequency of spontaneous and miniature excitatory postsynaptic currents (EPSCs) was recorded from axotomized neurons at 1 d and intact neurons at 2 d after injury, likely reflecting an increased number of afferents. This also was reflected in the increased amplitude of the EPSC evoked by local extracellular stimulation for all neurons from injured cortex and increased likelihood of producing an action potential for intact cells. Field potentials recorded in superficial layers after online deep layer stimulation contained a single negative peak in controls but multiple negative peaks in injured tissue. The amplitude of this evoked negativity was significantly larger than controls over a series of stimulus intensities at both the 1 d and 2 d survival times. Interictal-like spikes never occurred in the field potential recordings from controls but were observed in 20-80% of stimulus presentations in injured cortex. Together, these results suggest an overall increase in network excitability and the production of particularly powerful (intact) neurons that have both increased intrinsic and synaptic excitability.

Indexed as

Brain InjuriesNeocortexNerve NetPyramidal CellsAction PotentialsAnimalsAxonsDisease Models, AnimalElectric StimulationExcitatory Postsynaptic PotentialsMaleMiceMice, Inbred C57BLPatch-Clamp Techniquesaxotomyfield potentialneocortexpatch clampsynaptic excitation

Identifiers

PMID25789412
PMCPMC4593977
OpenAlexW2319863743

What OpenQuestion holds

Textmetadata
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.