ReviewJPRAS open2025
Variation and distribution in temporalis muscle innervation: A systematic review and meta-analysis of anatomical studies.
Review in JPRAS open, 2025. 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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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.
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: Despite extensive discourse on the utilisation of the temporal muscle for facial reanimation, anatomical description regarding the innervation of its motor nerve branches is incomplete and varied. This systematic review aimed to consolidate the existing evidence concerning the distribution and variation in the pattern of temporalis innervation. Methods: A PRISMA-compliant systematic literature search was conducted in November 2023 and included studies offering anatomical insights into the distribution and variation of temporalis innervation patterns. Multiple category prevalence and proportional meta-analysis were conducted. Results: The initial search yielded 978 results, from which 13 studies were selected for inclusion. The inferior anterior temporalis muscle region was found to receive innervation from the buccal nerve's superior branch and inferior posterior region from the masseteric nerve. In the superior part, comprising anterior, middle and posterior regions, innervation is provided by the branches of the deep temporal nerve (DTN) arising from various branches of the mandibular or masseteric nerves. Analysis revealed that the most common variation of DTN was the presence of two branches (46%, 95% CI: 46%-63%, I Conclusion: In conclusion, this systematic review and meta-analysis highlight the evolving understanding and complexities of temporalis innervation, revealing the variations in nerve branches and emphasising the need for further research.
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