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ASMT- Injury #1
Mid-term muscle chart
Muscle | Attachments | Action | Joints | Injuries | Sports Injuries | Considerations |
---|---|---|---|---|---|---|
Sternocleidomastoid (SCM) | sternum, clavicle, mastoid | lat. flexion of cervical spine, rotation to opposite side, cervical flexion | atlanto-occipital, atlanto-axial | headaches, whiplash, TOS, TMJD, torticollis | contact (soccer, football) direct blow, improper weight lifting | ability to turn head, physician release, inflammation/mm tears, whiplash may include TOS, TMJD, and headaches |
Deltoid | clavicle, acromion process, spine of scap, deltoid tuberosity | flexion/extension, abduction (after 15 degrees), med. rot., lat. rot. | glenohumeral, sternoclavicular, acromioclavicular, scapulothoracic | rotator cuff tear, bursitis, dislocation of glenohumeral joint, shoulder impingement, catching or locking, shoulder separation, fracture, frozen shoulder | repetitive movements (baseball, swimming)direct blow, improper weight lifting | shoulder dislocation, surgery, inflammation/muscle tears |
Supraspinatus | supraspinatus fossa, greater tubercle of humerus | abduction (first 15 degrees) | glenohumeral, sternoclavicular, acromioclavicular, scapulothoracic | rotator cuff tear, bursitis, dislocation of glenohumeral joint, shoulder impingement, catching or locking, shoulder separation, fracture, frozen shoulder | repetitive movements (baseball, swimming)direct blow, improper weight lifting | shoulder dislocation, surgery, inflammation/muscle tears |
Infraspinatus | infraspinatus fossa, greater tubercle of humerus | lat. rot. | glenohumeral, sternoclavicular, acromioclavicular, scapulothoracic | rotator cuff tear, bursitis, dislocation of glenohumeral joint, shoulder impingement, catching or locking, shoulder separation, fracture, frozen shoulder | repetitive movements (baseball, swimming)direct blow, improper weight lifting | shoulder dislocation, surgery, inflammation/muscle tears |
Teres Minor | lat. border of scap, greater tubercle of humerus | lat. rot. | glenohumeral, sternoclavicular, acromioclavicular, scapulothoracic | rotator cuff tear, bursitis, dislocation of glenohumeral joint, shoulder impingement, catching or locking, shoulder separation, fracture, frozen shoulder | repetitive movements (baseball, swimming)direct blow, improper weight lifting | shoulder dislocation, surgery, inflammation/muscle tears |
Subscapularis | subscap. fossa, lesser tubercle of humerus | med. rot. | glenohumeral, sternoclavicular, acromioclavicular, scapulothoracic | rotator cuff tear, bursitis, dislocation of glenohumeral joint, shoulder impingement, catching or locking, shoulder separation, fracture, frozen shoulder | repetitive movements (baseball, swimming)direct blow, improper weight lifting | shoulder dislocation, surgery, inflammation/muscle tears |
Rhomboids | C7-T5, med border of scap | adduction | glenohumeral, sternoclavicular, acromioclavicular, scapulothoracic | rotator cuff tear, bursitis, dislocation of glenohumeral joint, shoulder impingement, catching or locking, shoulder separation, fracture, frozen shoulder | repetitive movements (baseball, swimming)direct blow, improper weight lifting | shoulder dislocation, surgery, inflammation/muscle tears |
Extensors | lat. epicondyle | extension of fingers & wrist | humeroulnar, humeroradial, proximal radioulnar | fractures, carpal tunel, compression injuries, lateral epicondylitis, bursitis | repetitive movement (tennis), falling on extended arm (skateboarding rollerblading) | |
Flexors | med. epicondyle | grip, flex wrist | humeroulnar, humeroradial, proximal radioulnar | fractures, carpal tunel, compression injuries, medial epicondylitis, bursitis | repetitive movement (golf), falling on extended arm (skateboarding rollerblading) | |
Trapezius | (head #1)occipital ridge (head #2&3) C7-T3 to acromion process (head #4) T4-T7 to spine of scap | elevation/depression, adduction | whiplash, poor posture, carrying heavy objects over shoulder, holding phone w/shoulder | repetitive overhead movement, direct blow, improper weight lifting, poor posture, muscle imbalance | neck injuries, inflammation, working with other scap muscles (pec minor, serratus, rhomboids) | |
Suboccipitals | occipital ridge, C1-C2 (atlas & axis) | rocking/tilting, rotation | atlanto-occipital, atlanto-axial | headaches, whiplash, TOS, TMJD, torticollis | contact (soccer, football) direct blow, improper weight lifting | ability to turn head, physician release, inflammation/mm tears, whiplash may include TOS, TMJD, and headaches |
Scalenes | TP of C2-C7 to ribs 1-2 | elevate ribs for breathing, lat. flexion of cervical spine, cervical flexion | atlanto-occipital, atlanto-axial | headaches, whiplash, TOS, TMJD, torticollis | contact (soccer, football) direct blow, improper weight lifting | ability to turn head, physician release, inflammation/mm tears, whiplash may include TOS, TMJD, and headaches |