ArticleToxins2021
Clinical and Neurophysiological Effects of Botulinum Neurotoxin Type A in Chronic Migraine.
Article in Toxins, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled 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.
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.
Who cites it
8 citing papers in PubMed, 1 synthesis or guideline pooled it, 17 citations in OpenAlex.
- Botulinum toxin effects on biochemical biomarkers related to inflammation-associated head and neck chronic conditions: a systematic review of clinical research.Journal of neural transmission (Vienna, Austria : 1996) · 2025Pooled it
- Botulinum Toxin for Chronic Migraine: Beyond Headache Reduction and Toward Possible Cognitive Benefits.Toxins · 2026Review
- Neurochemical Changes Following Botulinum Toxin Type A in Chronic Migraine: An LC-MS/MS and HPLC Evaluation of Plasma and Urinary Biomarkers.Journal of clinical medicine · 2026Article
- Pioneering pain management with botulinum toxin type A: From anti-inflammation to regenerative therapies.Heliyon · 2025Review
- Insights from 25 years of onabotulinumtoxinA in migraine - mechanisms and management.Nature reviews. Neurology · 2024Review
- Clinical diagnostic utility of transcranial magnetic stimulation in neurological disorders. Updated report of an IFCN committee.Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology · 2023Review
- Migraine Prevention through Ketogenic Diet: More than Body Mass Composition Changes.Journal of clinical medicine · 2022Article
- Acupuncture Modulation Effect on Pain Processing Patterns in Patients With Migraine Without Aura.Frontiers in neuroscience · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Chronic pain syndromes present a subversion of both functional and structural nociceptive networks. We used transcranial magnetic stimulation (TMS) to evaluate changes in cortical excitability and plasticity in patients with chronic migraine (CM) treated with botulinum neurotoxin type A (BoNT/A). We enrolled 11 patients with episodic migraine (EM) and 11 affected by CM. Baseline characteristics for both groups were recorded using single- and paired-pulse TMS protocols. The same TMS protocol was repeated in CM patients after four cycles of BoNT/A completed in one year. At baseline, compared with EM patients, patients with CM had a lower threshold in both hemispheres (right hemisphere: 46% ± 7.8 vs. 52% ± 4.28,
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What OpenQuestion holds
Registered trials
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.