Glenohumeral, Scapular, and Thoracic Angles at Maximum Shoulder External Rotation in Throwing

Miyashita, Koji; Kobayashi, Hitome; Koshida, Sentaro; Urabe, Yukio

doi:10.1177/0363546509347542

Cited by 55 publications

(39 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Non-invasive methods for measuring scapula motion are required in a variety of clinical and sports applications [1][2][3][4][5][6]. Tracking the acromion shows potential for estimating scapular movement.…”

Section: Introductionmentioning

confidence: 99%

Scapular Motion Tracking Using Acromion Skin Marker Cluster: In Vitro Accuracy Assessment

et al. 2015

View full text Add to dashboard Cite

Several studies have recently investigated how the implementations of acromion marker clusters (AMCs) method and stereo-photogrammetry affect the estimates of scapula kinematics. However, in the large majority of these studies, the accuracy assessment of the scapular kinematics obtained with AMCs was carried out through a comparative evaluation using a scapula locator that is prone to error. The present study assesses AMC accuracy based on best practice recommendations, both with single and double anatomical calibration implementations, during several passive shoulder movements. Experiments were carried out on three cadaveric specimens. The scapula motion was acquired with a stereo-photogrammetric system using intra-cortical pins. When the scapula kinematics was estimated using an AMC combined with a single anatomical calibration, the accuracy was highly dependent on the specimen and the type of motion (maximum errors between -6.2°and 44.8°) and the scapular motion was generally overestimated. Moreover, with this implementation, scapular orientation errors increased for shoulder configurations distant from the reference shoulder configuration chosen for the calibration procedure. The double calibration implementation greatly improved the estimate of the scapular kinematics for all specimens and types of motion (maximum errors between -1.0°and 14.2°). The double anatomical calibration implementation should be preferred since it reduces the kinematics errors to levels which are acceptable in most clinical applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Scapular Motion Tracking Using Acromion Skin Marker Cluster: In Vitro Accuracy Assessment

et al. 2015

View full text Add to dashboard Cite

show abstract

“…No more than 1.5° of movement was reported to occur in any direction in positions less than 60°, with as reported above greater ranges occurring at maximum flexion elevation and abduction elevation of 4.0‐6.7 extension, 7.3‐9.1° lateral flexion and 2.1‐5.2° axial rotation reported . During mid‐range flexion elevation (80°), Crosbie et al reported approximately 11° of thoracic extension and during unilateral maximum external range of shoulder movement, and Miyashita et al reported 8.9° of thoracic extension. With few studies, all at risk of bias, this amounts to a very low level of evidence for thoracic spine movement ranges during early and mid‐ranges of arm elevation.…”

Section: Resultsmentioning

confidence: 91%

“…This was a methodologically rigorous review synthesizing evidence to support clinical practice recommendations in assessing shoulder and functional movement impairment in athletes and guide and inform further high‐quality research. The main limitations to inform conclusions of this systematic review include a lack of research into the population of interest with only one study assessing an athletic population and lack of reporting guidelines specific for exploratory laboratory‐based studies (case‐controlled and cohort). Additional methodological limitations of this review include lack of a published protocol and full‐text review being completed by one reviewer.…”

Section: Discussionmentioning

confidence: 99%

“…The main limitations to inform conclusions of this systematic review include a lack of research into the population of interest with only one study assessing an athletic population 40 and lack of reporting guidelines specific for exploratory laboratory-based studies (case-controlled and cohort). Additional methodological limitations of this review include lack of a published protocol and full-text review being completed by one reviewer.…”

Section: Strengths and Limitationsmentioning

confidence: 99%

See 1 more Smart Citation

Thoracic spine mobility, an essential link in upper limb kinetic chains in athletes: A systematic review

et al. 2019

View full text Add to dashboard Cite

Knowledge of the contribution of the thoracic spine movement, a requisite for UL functional movement, offers the potential for novel directions for research and management in rehabilitation. This systematic reviewed synthesized evidence of thoracic spine mobility during UL movement in athletes. Using three reviewers at each stage, key databases (MEDLINE, CINAHL, Web of Science) were searched up to 30/6/18. Eligibility criteria: adults age 18‐40 (reflecting athletic population) and studies assessing thoracic spine and UL movement. Quality assessment was evaluated using AXIS tool and GRADE for overall quality of evidence. Seven studies were included (n = 168, mean age 26.4 years, 33% males) with n = 20 in an athlete population. Main findings were: Unilateral and bilateral UL flexion resulted in 6.7‐8.0 and 12.0‐12.8° thoracic extension, respectively. Unilateral and bilateral UL abduction resulted in 3.0‐4.0 and 9.0‐15.0 and degrees, respectively. Other thoracic spine movement (lower and upper, rotation and lateral flexion) was variable across movement planes. Overall there was unequivocal evidence of thoracic spine movement, mainly extension during UL movement and notably at the end of elevation across all planes. Findings support further targeted high‐quality research and examination of thoracic mobility, an essential link in the kinetic chain, in practice.

show abstract

“…Thus, we suggest that a relationship exists between the shoulder ER ROM deficit side and medial elbow injuries in young baseball players. In addition, the alleviation of mechanical stress on the medial elbow while throwing is related to the maximum ER occurring during the late cocking phase (pitching phase two) 33) . Shoulder ER ROM deficit possibly could not induce a large ER during the late cocking phase, leading to mechanical stress on the medial elbow.…”

Section: Discussionmentioning

confidence: 99%

Side-to-side differences in range of motion, muscle strength, and medial elbow laxity in young baseball players with medial elbow injuries

Morifuji

Nakao

Inaba

et al. 2017

JPFSM

View full text Add to dashboard Cite

Medial elbow injuries lead to significant performance decrement in baseball.Repetitive throwing alters mechanical physiology. Some of such changes can increase the risk of medial elbow injuries. However, in young baseball players with medial elbow injuries, these changes have not been fully investigated. Thus, the purpose of this study was to investigate the mechanical physiological changes in young baseball players with medial elbow injuries. Sideto-side differences in (1) range of motion (ROM) of shoulder external rotation (ER)/internal rotation (IR), elbow flexion/extension, forearm supination/pronation, trunk rotation, and hip ER/IR; (2) strength of middle trapezius, lower trapezius (LT), and supraspinatus muscles, and shoulder ER/IR; and (3) medial elbow laxity were measured. Side-to-side differences were significant (p < 0.05). ROM of shoulder ER/IR, elbow flexion/extension, forearm pronation, and hip IR on the throwing side were significantly decreased compared to the non-throwing side. Trunk rotation in the direction of the throwing side was significantly decreased compared to the non-throwing side. LT and shoulder IR strength on the throwing side were significantly greater, while shoulder ER strength on the throwing side was significantly weaker than the non-throwing side. Medial elbow joint space of the throwing side was significantly wider than the nonthrowing side. In other measurements, no significant differences were observed between the throwing and non-throwing side. According to our findings, young baseball players with medial elbow injuries experience many side-to-side differences in mechanical physiology. The most interesting finding was that younger players with medial elbow injuries displayed decreased shoulder ER ROM, versus an increase reported in many previous studies.

show abstract

Glenohumeral, Scapular, and Thoracic Angles at Maximum Shoulder External Rotation in Throwing

Abstract: To better understand the pathomechanics of the shoulder complex in throwing, we need to take into account the individual contributions of the glenohumeral, scapulothoracic, and thoracic extension movements to the MER.

Cited by 55 publications

References 27 publications

Scapular Motion Tracking Using Acromion Skin Marker Cluster: In Vitro Accuracy Assessment

Scapular Motion Tracking Using Acromion Skin Marker Cluster: In Vitro Accuracy Assessment

Thoracic spine mobility, an essential link in upper limb kinetic chains in athletes: A systematic review

Side-to-side differences in range of motion, muscle strength, and medial elbow laxity in young baseball players with medial elbow injuries

Contact Info

Product

Resources

About