Logo image
Back
Muscle Activation Associated with Scapular Function and Dysfunction
Book chapter

Muscle Activation Associated with Scapular Function and Dysfunction

David Ebaugh and Margaret Finley
Disorders of the Scapula and Their Role in Shoulder Injury, pp 25-33
31 May 2017
DOI: https://doi.org/10.1007/978-3-319-53584-5_3

Abstract

Force couples Glenohumeral Muscle activation Scapulothoracic Soft tissue inflexibility
This chapter discusses the role of muscles involved with the production and control of scapulothoracic and glenohumeral joint movements. The role of the primary muscles and muscle force couples involved with scapulothoracic and glenohumeral movements is presented. Specifically, production and control of the scapulothoracic movement by the trapezius, levator scapulae, rhomboids, serratus anterior, and pectoralis minor is offered. The role of the deltoid and rotator cuff muscles as the primary muscles that produce glenohumeral movements and provide glenohumeral stability is detailed. In addition, muscle force couples that allow smooth glenohumeral elevation through a coordinated balance of scapulothoracic and glenohumeral movements are reviewed. Neuromuscular lesions such as nerve entrapment, neuritis, or nerve lesions result in altered muscle activation that in turn produces aberrant kinematics. Impairment to the long thoracic nerve, spinal accessory nerve, dorsal scapular nerve, and suprascapular nerve is examined. Impaired flexibility of soft tissues associated with the shoulder girdle has been proposed to influence the position and movement of the scapula. The pectoralis minor muscle and posterior rotator cuff musculature/posterior glenohumeral joint capsule are discussed along with clinical implications for rehabilitation guidelines.

Metrics

15 Record Views
1 citations in Scopus

Details

Logo image