{"title":"Assessing Changes in Hand Tactile Sensitivity After Glabellar Botulinum Toxin Treatment.","authors":"Johnson T Hoang, Renata M Maia, Cat N Burkat","doi":"10.1097/IOP.0000000000002764","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>The authors aimed to assess behavioral changes in tactile sensitivity in patients receiving cosmetic glabellar botulinum toxin-A injections.</p><p><strong>Methods: </strong>In this prospective cohort study, the authors conducted quantitative sensory testing on 20 patients receiving 15 to 35 units of glabellar botulinum toxin-A treatment between October 1, 2022 and March 8, 2023. The authors used modified Von Frey filaments to exert forces between 0.25 mN and 512 mN to the dorsal hand just prior to botulinum toxin-A injections. Filament tips were uniform, rounded, and 0.5 mm in diameter to prevent nociceptor activation. This process was repeated 4 to 6 weeks after injection to assess for any change in minimal mechanical detection thresholds.</p><p><strong>Results: </strong>Minimal mechanical detection thresholds decreased (patients detected smaller amounts of force) overall, in patients with prior botulinum toxin-A treatment, and in patients without prior botulinum toxin-A treatment: 5.34 mN to 4.33 mN ( p = 0.22), 6.43 mN to 5.97 mN ( p = 0.31), and 4.44 mN to 3.00 mN ( p = 0.53), respectively.</p><p><strong>Conclusions: </strong>The authors' results suggest that the plastic changes observed in previous studies do not necessarily result in clinically significant manifestations when utilizing small to moderate amounts of botulinum toxin-A for aesthetic correction of glabellar lines, thus highlighting the safety of botulinum toxin-A for this indication. Further research is required to gain a comprehensive understanding of whether hand-associated cortical activity is altered after aesthetic amounts of botulinum toxin are injected.</p>","PeriodicalId":19588,"journal":{"name":"Ophthalmic Plastic and Reconstructive Surgery","volume":" ","pages":"161-165"},"PeriodicalIF":1.2000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ophthalmic Plastic and Reconstructive Surgery","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1097/IOP.0000000000002764","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/8/29 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"OPHTHALMOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Purpose: The authors aimed to assess behavioral changes in tactile sensitivity in patients receiving cosmetic glabellar botulinum toxin-A injections.
Methods: In this prospective cohort study, the authors conducted quantitative sensory testing on 20 patients receiving 15 to 35 units of glabellar botulinum toxin-A treatment between October 1, 2022 and March 8, 2023. The authors used modified Von Frey filaments to exert forces between 0.25 mN and 512 mN to the dorsal hand just prior to botulinum toxin-A injections. Filament tips were uniform, rounded, and 0.5 mm in diameter to prevent nociceptor activation. This process was repeated 4 to 6 weeks after injection to assess for any change in minimal mechanical detection thresholds.
Results: Minimal mechanical detection thresholds decreased (patients detected smaller amounts of force) overall, in patients with prior botulinum toxin-A treatment, and in patients without prior botulinum toxin-A treatment: 5.34 mN to 4.33 mN ( p = 0.22), 6.43 mN to 5.97 mN ( p = 0.31), and 4.44 mN to 3.00 mN ( p = 0.53), respectively.
Conclusions: The authors' results suggest that the plastic changes observed in previous studies do not necessarily result in clinically significant manifestations when utilizing small to moderate amounts of botulinum toxin-A for aesthetic correction of glabellar lines, thus highlighting the safety of botulinum toxin-A for this indication. Further research is required to gain a comprehensive understanding of whether hand-associated cortical activity is altered after aesthetic amounts of botulinum toxin are injected.
期刊介绍:
Ophthalmic Plastic and Reconstructive Surgery features original articles and reviews on topics such as ptosis, eyelid reconstruction, orbital diagnosis and surgery, lacrimal problems, and eyelid malposition. Update reports on diagnostic techniques, surgical equipment and instrumentation, and medical therapies are included, as well as detailed analyses of recent research findings and their clinical applications.