ArticleAnatomical science international2026
Optimal target localization for botulinum toxin A in treating splenius muscles dystonia based on the distribution of intramuscular nerves and spindles.
Article in Anatomical science international, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Botulinum toxin A injection is commonly used to treat splenius muscle dystonia; however, the optimal injection site within the muscle remains unidentified. This study identified the optimal target for botulinum toxin A based on the distribution of intramuscular nerves and spindles in the splenius muscles. This study included 24 adult individuals. The curve connecting the external occipital protuberance and the third thoracic spinous process was the longitudinal reference line (line L). The curve connecting the external occipital protuberance and the mastoid process was the horizontal reference line (line H). Modified Sihler's staining showed an intramuscular nerve-dense region in the splenius muscles. Muscle spindle abundance was calculated after hematoxylin and eosin staining. The center of the region of the highest muscle spindle abundance was localized using computed tomography. The projection points (P and P') of the center of the region of the highest muscle spindle abundance behind and in front of the neck, position of P (P
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