Dynamic Spatial Tuning of Cervical Muscle Reflexes to Multidirectional Seated Perturbations

Ólafsdóttir, Jóna Marín; Brolin, Karin; Blouin, Jean‐Sébastien; Siegmund, Gunter P.

doi:10.1097/brs.0000000000000721

Cited by 17 publications

(14 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Three low-velocity impact scenarios were tested: low (1.7 g), medium (2.6 g), and high (3.8 g) impact pulse. The sled impact pulse was within the range of other studies on the volunteer dynamic response in frontal impacts, such as those by Beeman et al (2.5–4.7g) [2] and Seacrist et al (3.8 g) [36], who used inverse dynamics analysis of the neck loads, as well as other experimental and numerical studies on the neck muscle activity [5,8,37,41,42]. Table 1 shows the average parameters (mean ± standard deviation (SD)) of the impact pulse used.…”

Section: Methodssupporting

confidence: 68%

“…That implies that trapezius has the most significant force generation ability. On the other hand, Ólafsdóttir et al [37] estimated the role of trapezius as minor. Considering their study was based on volunteer testing at

~

1.5 g, it implies that deeper neck muscles were active in stabilizing the head, and no major displacements and rotations occurred.…”

Section: Discussionmentioning

confidence: 99%

“…However, the joint moment results from the action of the whole muscle group, the electrical activity of which cannot be assessed with a single EMG electrode, making it difficult to correlate the EMG signal to the body dynamic response directly. Ólafsdóttir et al [37] obtained experimental data using surface and needle EMG electrodes on the cervical muscles, and found a large range of neck muscle activity levels during perturbations with low pulse in different directions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Novel Approach to Measuring Muscle Mechanics in Vehicle Collision Conditions

Kraśna

Đorđević

Hribernik

et al. 2017

Sensors

View full text Add to dashboard Cite

The aim of the study was to evaluate a novel approach to measuring neck muscle load and activity in vehicle collision conditions. A series of sled tests were performed on 10 healthy volunteers at three severity levels to simulate low-severity frontal impacts. Electrical activity—electromyography (EMG)—and muscle mechanical tension was measured bilaterally on the upper trapezius. A novel mechanical contraction (MC) sensor was used to measure the tension on the muscle surface. The neck extensor loads were estimated based on the inverse dynamics approach. The results showed strong linear correlation (Pearson’s coefficient r¯P = 0.821) between the estimated neck muscle load and the muscle tension measured with the MC sensor. The peak of the estimated neck muscle force delayed 0.2 ± 30.6 ms on average vs. the peak MC sensor signal compared to the average delay of 61.8 ± 37.4 ms vs. the peak EMG signal. The observed differences in EMG and MC sensor collected signals indicate that the MC sensor offers an additional insight into the analysis of the neck muscle load and activity in impact conditions. This approach enables a more detailed assessment of the muscle-tendon complex load of a vehicle occupant in pre-impact and impact conditions.

show abstract

Section: Methodssupporting

confidence: 68%

~

1.5 g, it implies that deeper neck muscles were active in stabilizing the head, and no major displacements and rotations occurred.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Novel Approach to Measuring Muscle Mechanics in Vehicle Collision Conditions

Kraśna

Đorđević

Hribernik

et al. 2017

Sensors

View full text Add to dashboard Cite

show abstract

“…An increased segment angle should be possible as the EMG amplitudes was reduced. However, deeper muscles might be more active [8,30].…”

Section: Discussionmentioning

confidence: 99%

“…Deeper muscles have been suggested to be of importance for stabilizing the spine in seated postural reactions during external perturbations [8,30]. However, the needle insertion causes discomfort, could be difficult to place and, given the sensitive structures in the neck, and requires special ethical considerations.…”

mentioning

confidence: 99%