Advertisement

Region Dependent Distribution of Muscle Fibre Types and Muscle Spindles in the Human Masseter Muscle Studied in Cross-Sections of Whole Muscle

  • P.-O. Eriksson
  • A. Eriksson
  • I. Johansson
  • M. Monemi
  • L.-E. Thornell

Abstract

Human masseter is divided anatomical into superficial and deep parts, but regional specialisation in the distribution of fibre types and muscle spindles is organised differently. Thus, the anterior part is predominantly composed of type I fibres whereas type II fibres are concentrated in the posterior part. Spindles are most numerous and complex in the deep portion (Eriksson & Thornell, 1983; 1987). Previous studies concentrated on antero-posterior differences and were based on samples from restricted muscle regions. Since they may have missed medio-lateral variations the present study has been carried out on whole muscle transverse sections using enzyme- and immunohistochemical methods.

Keywords

Motor Unit Fibre Type Muscle Spindle Masseter Muscle Deep Portion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Eriksson, P.-O. & Thornell, L.-E. (1983) Histochemical and morphological muscle-fibre characteristics of the human masseter, the medial pterygoid and the temporal muscles. Arch. Oral Biol. 28, 781–795.PubMedCrossRefGoogle Scholar
  2. Eriksson, P.-O. & Thornell, L.-E. (1987) Relation to extrafusal fibre-type composition in muscle-spindle structure and location in the human masseter muscle. Arch. Oral Biol. 32, 483–491.PubMedCrossRefGoogle Scholar
  3. Eriksson, P.-O., Stålberg, E. & Antoni, L. (1984) Flexibility in motor-unit firing pattern in human temporal and masseter muscles related to type of activation and location. Arch. Oral Biol. 29, 707–712.PubMedCrossRefGoogle Scholar
  4. McMillan, A. S. & Hannam, A. G. (1992) Task-related behaviour of motor units in different regions of the human masseter muscle. Arch. Oral Biol. 37, 849–857.PubMedCrossRefGoogle Scholar
  5. Stålberg, E. & Eriksson, P.-O. (1987) A scanning electromyographic study of the topography of human masseter single motor units. Arch. Oral Biol. 32, 793–797.PubMedCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • P.-O. Eriksson
    • 1
  • A. Eriksson
    • 2
  • I. Johansson
    • 1
  • M. Monemi
    • 1
  • L.-E. Thornell
    • 3
  1. 1.Department of Clinical Oral PhysiologyUmeå UniversityUmeåSweden
  2. 2.Department of Forensic MedicineUmeå UniversityUmeåSweden
  3. 3.Department of AnatomyUmeå UniversityUmeåSweden

Personalised recommendations