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KMID : 0311120230640080511
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Yonsei Medical Journal
2023 Volume.64 No. 8 p.511 ~ p.517
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Intramuscular Neural Distribution of the Gastrocnemius for Botulinum Neurotoxin Injection: Application to Cosmetic Calf Shaping
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Yi Kyu-Ho
Park Hyun-Jin
Kim Jin-Hyun
Kim Seon-Oh
Cheon Gwahn-Woo
An Min-Ho
Lee Hyung-Jin
Lee Ji-Hyun
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Abstract
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Purpose: Anatomical landmarks can provide vital information on the distribution of nerves in the gastrocnemius muscle. We aimed to provide an anatomical perspective on appropriate locations for botulinum neurotoxin (BoNT) injections in the medial and lateral parts of the gastrocnemius for calf shaping.
Materials and Methods: A modified Sihler’s method was applied to both the medial and lateral parts of the gastrocnemius mus cles (16 specimens). Intramuscular neural distributions were revealed by dissecting along a transverse line crossing the fibular head and superior margin of the calcaneal tuberosity.
Results: The intramuscular neural distribution for the medial and lateral parts of the gastrocnemius had the greatest arborized patterns in the 7/10?8/10 section of the medial head and 7.5/10?8.5/10 section of the lateral part of the gastrocnemius.
Conclusion: We propose that BoNT injections should be directed to the 7/10?8/10 section of the medial head and the 7.5/10?8.5/10 section of the lateral part of the gastrocnemius. Following our guidelines, clinicians can ensure satisfactory results with the use of minimal doses to limit adverse effects, such as gait disturbance, antibody production, and bruising, due to multiple injec tions. The results can also be altered and applied to electromyography.
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KEYWORD
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Clinical guideline, gastrocnemius, calf, cosmetic calf shaping, botulinum neurotoxin
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