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. 2022 Oct 10:12:31.
doi: 10.5334/tohm.723. eCollection 2022.

Measurement Issue in Antecollis

Kyung Ah Woo  1 , Jae Young Joo  1 , Jung Hwan Shin  1 , Chan Young Lee  2 , Seung-Ho Jeon  1 , Jee-Young Lee  3   4 , Han-Joon Kim  1   3 , Beomseok Jeon  1   3
Affiliations

Measurement Issue in Antecollis

Kyung Ah Woo et al. Tremor Other Hyperkinet Mov (N Y). .

Abstract

Background: Antecollis is defined as an involuntary forward flexion of the neck. Previous reports have measured the neck flexion angles based on the line perpendicular to the ground. This led to an inflation of the neck flexion angles in patients who had combined forward truncal flexions, especially upper camptocormia.

Methods: We examined the neck flexion angles and the upper camptocormia angle in the published photographs of antecollis. MEDLINE search was conducted using the following search terms: antecollis OR anterocollis. Lateral-view photographs of patients diagnosed with antecollis were collected. Neck flexion angles were measured with the classic 'perpendicular method' and the 'antecollis method' we developed.

Results: Nine patient photographs were identified. While antecollis was the only described postural abnormality in eight cases, these patients exhibited upper camptocormia angles of 45° or larger. The mean neck flexion angle measured with the antecollis method was 49.7°, while the perpendicular method yielded 103.4°.

Discussion: Upper camptocormia should be considered in the evaluation of antecollis. We propose a new method to measure neck flexion in relation to the torso, instead of the vertical line.

Keywords: Bent Spine Syndrome; Camptocormia; Parkinsonism; Postural balance.

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Conflict of interest statement

The authors have no competing interests to declare.

Figures

Measurement methods of neck flexion angles and upper camptocormia angle in the patient photographs
Figure 1
Measurement methods of neck flexion angles and upper camptocormia angle in the patient photographs. Postural angles were measured in the published photographs of antecollis patients in the literature. The figure depicts the measurement methods including the antecollis method and the perpendicular method for neck flexion, and the upper camptocormia method.
Flowchart of the Literature Review Process
Supplementary Figure 1
Flowchart of the Literature Review Process.
See this image and copyright information in PMC

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Supplementary concepts