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Related Experiment Videos

Innervation pattern of the temporalis muscle

V B Ziccardi1, L Mu, R E Schneider

  • 1Department of Oral-Maxillofacial Surgery, University of Medicine and Dentistry of New Jersey, Newark 07103-2400, USA.

The Journal of Craniofacial Surgery
|May 20, 1998
PubMed
Summary

This study reveals the deep temporal nerve divides into anterior and posterior branches within the temporalis muscle. This anatomical finding, along with regional innervation differences, suggests functional specialization of the temporalis muscle.

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Area of Science:

  • Anatomy
  • Neuroscience
  • Surgical Anatomy

Background:

  • The temporalis muscle's intricate neural pathways are crucial for mastication and facial movement.
  • Understanding its intramuscular anatomy aids in surgical procedures and treating temporalis-related disorders.

Purpose of the Study:

  • To delineate the neural anatomy of the temporalis muscle along the intramuscular temporal fascial plane.
  • To investigate the relationship between the deep temporal nerve and the fascial plane.
  • To explore potential regional specialization within the temporalis muscle.

Main Methods:

  • Dissection of eight preserved temporalis muscle specimens using Sihler's staining technique.
  • Microscopic examination along the intramuscular fascial plane to preserve neural and arterial structures.

Related Experiment Videos

  • Analysis of nerve divisions, arterial origins, and innervation density.

    • Main Results:

    • Identified anterior and posterior divisions of the deep temporal nerve within the deep portion of the temporalis muscle.
    • The intramuscular temporal fascia served as a natural dissection plane.
    • The deep temporal artery branched into anterior and posterior divisions, originating with the anterior temporal nerve.
    • Greater innervation density and muscle bulk were observed in the anterior portion compared to the posterior.

    Conclusions:

    • The deep temporal nerve exhibits distinct anterior and posterior divisions within the temporalis muscle.
    • Differences in innervation density and muscle bulk support the concept of regional temporalis muscle specialization.
    • The intramuscular temporal fascia offers a viable plane for surgical flaps, potentially preserving residual muscle function.