スカプラー運動とタスクの特異性:負荷方向の影響

Erin C S Lee¹, Nathan M Young², Rebekah L Lawrence³

¹Department of Mechanical and Materials Engineering, Queen's University, 130 Stuart St., Kingston, ON K7L 2V9, Canada.

Journal of biomechanics

|August 31, 2025

まとめ

腕を下げるときの健康的な肩の動きは,腕を上げるとき (誘拐) よりも上向きの回転を伴う. 肩関節の安定性を高め,肩の機能不全の治療に役立つ.

科学分野:

バイオメカニクス
人間運動科学
整形外科

背景:

の運動の現在の理解は,主に重力に対する誘拐に焦点を当てています.
高需要の活動に不可欠な同心誘導へのスカプラー寄与に関する研究は限られている.
腕を下げるときのの運動はまだ十分に研究されていない.

研究の目的:

コンセントリックな肩の誘導と誘導の間の 3 次元の肩の運動を調査し,比較する.
負荷特異性のある上向き回転の性質を理解する
腕の動きの際の門関節の安定に寄与する要因を特定する.

主な方法:

双面映像と光学モーションキャプチャを組み合わせた
制御可能なケーブルマシンを重量作業に利用した.
10人の健康な成人に加重された引き下げ (アドゥクション) とプレスアップ (アブドゥクション) 時のスカポロトラクスとグレノウメラル運動を比較した.

主要な成果:

コンセントリックアドゥクションは,コンセントリックアドゥクションと比較して,スカポロトラクスの上向きの回転が著しく増加した.
コンセントリック誘導はコンセントリック誘導よりも少ないゲルノウメラル誘導を伴う.
スカプラー運動の個体間の大幅な変動が観察されました.

結論:

肩骨の上向きの回転は負荷に依存し,胸の上昇にのみ依存しない.
負荷特異的な足首の動きは,関節の安定性を最適化することができます.
発見は,健康なスカプラー運動の理解を高め,不運動の識別と治療を支援し,筋骨格モデルを情報化します.

キーワード:

二平面ビデオ放射線グレノウメラル安定性関節のメカニズムスカプラー運動肩のバイオメカニクス

さらに関連する動画

06:09

Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography

Published on: March 12, 2021

3.2K

15:00

The Impact of Motor Task Conditions on Goal-Directed Arm Reaching Kinematics and Trunk Compensation in Chronic Stroke Survivors

Published on: May 2, 2021

3.6K

関連する概念動画

01:31

Muscles that Move the Arm

2.7K

Nine muscles are involved in arm movements. Two of these, the pectoralis major and latissimus dorsi, originate from the axial skeleton and are called axial muscles. The other seven originate from the scapula and are called the scapular muscles.
The pectoralis major has two origins. Its clavicular head originates on the medial half of the clavicle. In contrast, the sternocostal head originates on the costal cartilages of ribs 1-6, the sternum, and the aponeurosis of the external oblique of the...

2.7K

01:23

Muscles of the Shoulder

6.3K

The muscles surrounding the shoulder girdle, including the clavicle and scapula, primarily stabilize the scapula. This stable base allows other muscles to move the humerus effectively. Scapular movements often mirror those of the humerus and extend its range of motion. For instance, raising the arm above the head would not be feasible without simultaneous upward rotation of the scapula.
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...

6.3K

01:23

Unsymmetric Loading of Thin-Walled Members

146

Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
The concept of the shear center is crucial in countering the...

146

01:30

Machines: Problem Solving II

367

Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. Consider a lifting tong carrying a 100 kg load. It comprises movable sections DAF and CBG linked together with member AB.

367

01:19

Muscles that Move the Head

2.9K

The muscles that move the head are a dynamic and complex group of structures that work together to facilitate a wide range of head movements, including rotation, flexion, extension, and lateral bending.
The bilateral sternocleidomastoid, or SCM, and the suprahyoid and infrahyoid muscles are significant head flexors. The SCM muscles originate at the sternum and clavicle and attach to the mastoid process of the temporal bone. The SCM contracts bilaterally to bend the head forward, whereas...

2.9K

01:15

Stress: General Loading Conditions

375

To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....

375

関連する実験動画