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Related Experiment Video

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Assessment of Child Anthropometry in a Large Epidemiologic Study
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Measurement Issue in Antecollis.

Kyung Ah Woo1, Jae Young Joo1, Jung Hwan Shin1

  • 1Department of Neurology, Seoul National University Hospital, Seoul, South Korea.

Tremor and Other Hyperkinetic Movements (New York, N.Y.)
|October 31, 2022
PubMed
Summary
This summary is machine-generated.

Antecollis, or forward neck flexion, is often overestimated due to trunk flexion. A new measurement method accounting for upper camptocormia provides more accurate antecollis assessment.

Keywords:
Bent Spine SyndromeCamptocormiaParkinsonismPostural balance

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Area of Science:

  • Neurology
  • Orthopedics
  • Biomechanical Engineering

Background:

  • Antecollis is characterized by involuntary forward neck flexion.
  • Existing measurement methods based on a perpendicular line to the ground can inflate neck flexion angles, particularly when combined with forward truncal flexion (upper camptocormia).

Purpose of the Study:

  • To evaluate neck flexion angles and upper camptocormia in patients with antecollis.
  • To introduce and validate a novel method for measuring neck flexion relative to the torso.

Main Methods:

  • A MEDLINE search was performed using terms 'antecollis' and 'anterocollis'.
  • Lateral-view photographs of patients diagnosed with antecollis were analyzed.
  • Neck flexion angles were measured using both the traditional 'perpendicular method' and a newly developed 'antecollis method'.

Main Results:

  • Nine patient photographs were analyzed, with eight cases showing antecollis alongside upper camptocormia (≥45°).
  • The newly developed 'antecollis method' measured a mean neck flexion angle of 49.7°.
  • The traditional 'perpendicular method' yielded a significantly higher mean neck flexion angle of 103.4°.

Conclusions:

  • Upper camptocormia must be considered during the evaluation of antecollis.
  • The proposed 'antecollis method' offers a more accurate assessment of neck flexion by measuring relative to the torso, rather than a vertical line.