Evidence map›Paper›PMID 40489147›Full record

ArticleBehavioral neuroscience

Deep brain stimulation of nucleus basalis of meynert: Effect of stimulation mode and duration on learning in rat model of dementia.

Deepak Kumbhare, Megan Rajagopal, Jamie Toms, Anne Freelin, George Weistroffer, Nicholas McComb, Sindhu Karnam, Adel Azghadi, Kevin S Murnane, Mark S Baron and 1 more

Abstract read
In one paragraph

Article in Behavioral neuroscience. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
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

2 citing papers in PubMed.

  1. Novel neurotherapeutic targets for substance use disorders: Neuroplasticity, neuroinflammation, gasotransmitters and non-canonical organ systems.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2025
    Review
  2. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors.

Deepak KumbhareDepartment of Neurosurgery, Louisiana State University Health Science Center.ORCID 0000-0003-2514-9576
Megan RajagopalDepartment of Neurosurgery, Virginia Commonwealth University Health System.
Jamie TomsDepartment of Neurosurgery, Louisiana State University Health Science Center.
Anne FreelinDepartment of Neurosurgery, Louisiana State University Health Science Center.
George WeistrofferRichmond Research Institute, Richmond Veterans Affairs Medical Center.
Nicholas McCombRichmond Research Institute, Richmond Veterans Affairs Medical Center.
Sindhu KarnamRichmond Research Institute, Richmond Veterans Affairs Medical Center.
Adel AzghadiRichmond Research Institute, Richmond Veterans Affairs Medical Center.
Kevin S MurnaneDepartment of Pharmacology, Toxicology, and Neuroscience, Louisiana State University Health Science Center.
Mark S BaronDepartment of Neurology, Virginia Commonwealth University Health System.
Kathryn L HollowayDepartment of Neurosurgery, Virginia Commonwealth University Health System.

Funding

Deep brain stimulation of the Nucleus Basalis of Meynert: the role of stimulation parameters in neurogenesis and cognitive recovery.R03AG075637 · NIA · VIRGINIA COMMONWEALTH UNIVERSITY · PI KUMBHARE, DEEPAK · 2022 to 2023
$292k
NIA NIH HHS R03 AG075637NIH HHSVirginia Commonwealth University; Parkinson's and Movement Disorders Center
6 · The paper itself

Abstract

Deep brain stimulation (DBS) of the nucleus basalis of Meynert (NBM) has been preliminarily investigated as a potential treatment for dementia. The degeneration of NBM cholinergic neurons is a pathological feature of many forms of dementia. Although NBM stimulation has been demonstrated to improve learning, the ideal parameters for NBM stimulation have not been elucidated. This study assesses the differential effects of varying stimulation patterns and duration on learning in a dementia rat model with cholinergic deficits. 192-IgG saporin (SAP) or Dulbecco's phosphate buffered saline was injected into the NBM to produce dementia in rats. Next, all rats underwent unilateral implantation of a DBS electrode in the NBM. The experimental groups consisted of (a) normal, (b) untreated SAP-injected rats with cholinergic deficits, and (c) SAP rats receiving NBM DBS. The stimulation paradigms included testing different modes (tonic and burst) and durations (1 hr, 5 hr, and 24 hr/day) over 10 daily sessions. Memory was assessed using two established learning paradigms: novel object recognition and auditory operant chamber learning. Both normal and stimulated rats demonstrated improved performance in novel object recognition and auditory learning as compared to the unstimulated SAP group. The burst stimulation groups performed better than the tonic group. Increasing the daily stimulation duration to 24 hr did not further improve cognitive performance in an auditory recognition task and degraded the results on a novel object recognition task as compared with 5 hr. The present findings suggest that naturalistic NBM burst DBS may offer potential effective therapy for treating dementia and suggests potential strategies for the reevaluation of current human NBM stimulation paradigms. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

Indexed as

Basal Nucleus of MeynertDeep Brain StimulationDementiaLearningAnimalsAntibodies, MonoclonalCholinergic NeuronsDisease Models, AnimalMaleRatsRats, Sprague-DawleyRecognition, PsychologySaporins192 IgG-saporinAntibodies, MonoclonalSaporins

Identifiers

PMID40489147
PMCPMC12594289

What OpenQuestion holds

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Registered trials

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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.