Arm elevation involves cervical spine 3-D rotations

Rören, Alexandra; Nguyen, Christelle; Zauderer, Jennifer; Acapo, Sessi; Rannou, François; Roby-Brami, Agnès; Colau, Marie-Martine Lefevre

doi:10.1016/j.rehab.2019.09.005

Cited by 2 publications

(3 citation statements)

References 13 publications

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“…During pointing, however, the head was globally rotated toward the right relative to the trunk owing to the leftward rotation of the trunk. Importantly, then, as movement of the trunk participates in upper limb activity, the cervical spine rotates with complex 3D adjustments required to compensate trunk movement by counter-rotation [24]. At the same time, head movement with respect to the trunk was highly dependent upon target location during the pointing task.…”

Section: Discussionmentioning

confidence: 99%

“…We propose that improved understanding of reciprocal movements between the head and trunk during arm movement may improve the management of sports-related neck and shoulder conditions [24]. The method of measurement using electromagnetic sensors and calibration of bony landmarks has proven to have sound reliability for the measurement of humero-thoracic movement as well as range of motion though the neck and trunk [25,26].…”

Section: Introductionmentioning

confidence: 99%

“…Reciprocal movements observed at the level of the head and trunk are examined in order to improve understanding of the constraints to which the neck is subjected. Our hypothesis was that functional upper limb gestures would induce thoraco-lumbar rotation and thus prompt inverse rotation of the head [24].…”

Section: Introductionmentioning

confidence: 99%

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Orientation of the Head and Trunk During Functional Upper Limb Movement

et al. 2020

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Upper limb activities imply positioning of the head with respect to the visual target and may impact trunk posture. However, the postural constraints imposed on the neck remains unclear. We used kinematic analysis to compare head and trunk orientation during arm movements (pointing) with isolated movements of the head (heading). Ten right-handed healthy adults completed both experimental tasks. In the heading task, subjects directed their face toward eight visual targets placed over a wide frontal workspace. In the pointing task, subjects pointed to the same targets (each with their right arm). Movements were recorded using an electromagnetic spatial tracking system. Both orientation of the head and trunk in space (Euler angles) and orientation of the head relative to the trunk were extracted. The orientation of the head in space was closely related to target direction during both tasks. The trunk was relatively stable during heading but contributed to pointing, with leftward axial rotation. These findings illustrate that the neck compensates for trunk rotation during pointing, engaging in specific target-dependent 3D movement in order to preserve head orientation in space. Future studies may investigate neck kinematics of people experiencing neck pain in order to identify and correct inefficient movement patterns, particularly in athletes.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Orientation of the Head and Trunk During Functional Upper Limb Movement

et al. 2020

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Arm elevation involves changes in the whole spine: an exploratory study using EOS imaging

Rören,

Ogiez,

Gajny

et al. 2024

BMC Musculoskelet Disord

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Background Few studies have assessed the participation of the spine in arm elevation. The primary aim of this exploratory study was to specify spinal movements during unilateral arm elevation. Methods We used an EOS imaging system to assess 2D global posture (Sagittal Vertical Axis [SVA], T1 and T9 tilt and Central Sacral Line [CSL]) and segmental spine curves (C3-C7 in the sagittal plane only, and T1-T6, T7-T12 and L1-L5 in the sagittal and frontal planes) for four different left arm elevation levels: in the sagittal (Sa) plane (30°Sa: reference position, 140°Sa and 180°Sa), and in the scapular (Sc) plane (180°Sc), in ten right-handed asymptomatic participants (5 women; mean age 24.6 SD 3.0 years]. In addition, we estimated C1, head and pelvic orientation and head and pelvic linear displacement. We used Bayesian statistics (BF 10 > 3 indicates a significant variation: moderate, strong, very strong or extreme evidence). Results From 140°Sa to 180°Sa or Sc, the significant decrease in SVA and the T1-T9 tilt angles indicated a global backward spine bending (moderate to very strong evidence). The significant reversal of the C3-C7 lordosis at 30°Sa (-1.34 [2.53]°) to kyphosis at 180°Sa (13.88 [3.53]°, strong evidence) and 180°Sc (11.85 [2.75]°, extreme evidence) and the significant decrease in the T7-T12 kyphosis (26.58 [2.84]°at 30°Sa to 16.40 [2.65]° at 180°Sa and 17.60 [2.78]° at 180°Sc [all extreme evidence]) showed a global spine straightening. We found significant pelvic anteversion between 30°Sa and 140°Sa (moderate evidence) and persistent right spine bending and leftward head displacement (extreme evidence). The change in C1 orientation (extreme evidence) showed an atlanto-occipital extension. Conclusion Simple unconstrained movements of unilateral arm elevation involve the whole spine, pelvis and head, including significant backward spinal bending, a reduction in the low cervical spine lordosis and the thoracic kyphosis, and atlanto-occipital extension. Supplementary Information The online version contains supplementary material available at 10.1186/s12891-024-08093-7.

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Arm elevation involves cervical spine 3-D rotations

Cited by 2 publications

References 13 publications

Orientation of the Head and Trunk During Functional Upper Limb Movement

Orientation of the Head and Trunk During Functional Upper Limb Movement

Arm elevation involves changes in the whole spine: an exploratory study using EOS imaging

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