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Related Experiment Videos

Longus colli has a postural function on cervical curvature

M A Mayoux-Benhamou1, M Revel, C Vallée

  • 1Laboratoire d'Anatomie, CHU Cochin Port-Royal, Paris.

Surgical and Radiologic Anatomy : SRA
|January 1, 1994
PubMed
Summary
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The longus colli (LC) muscle counteracts increased cervical lordosis, working with dorsal neck muscles to stabilize the spine. Their complementary functions create a stabilizing sleeve for the cervical spine.

Area of Science:

  • Biomechanics
  • Anatomy
  • Physiology

Background:

  • The cervical spine's lordosis is influenced by neck muscle activity.
  • Understanding the specific roles of muscles like longus colli (LC) is crucial for spinal stability.

Purpose of the Study:

  • To investigate the relationship between the cross-sectional areas (force-generating capacity) of the longus colli and dorsal neck muscles and cervical spine lordosis.
  • To elucidate the complementary postural roles of the longus colli and dorsal neck muscles.

Main Methods:

  • Cross-sectional areas of neck muscles were measured using computerized tomography in 36 healthy subjects.
  • Cervical spine length and lordosis index were assessed via X-ray profiles.

Main Results:

Related Experiment Videos

  • A significant negative correlation was found between the cross-sectional area of the longus colli muscle and the lordosis index (R = -0.432, p < 0.02).
  • No significant correlations were observed between other measured muscle parameters and spinal length or lordosis.

Conclusions:

  • The longus colli muscle plays a key role in counteracting lordosis, particularly in response to head weight and dorsal neck muscle contraction.
  • The longus colli and dorsal neck muscles exhibit complementary postural functions, collectively stabilizing the cervical spine.