shoulder girdle
DESCRIPTION
Shoulder Girdle. KIN 245. Bones of the Shoulder Girdle. Scapula (shoulder) Clavicle (small key) Link to Axial skeleton via sternoclavicular joint (an anterior joint) Lack of posterior attachment to the axial skeleton allows for a wide ROM - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/1.jpg)
Shoulder Girdle
KIN 245
![Page 2: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/2.jpg)
Bones of the Shoulder Girdle
Scapula (shoulder) Clavicle (small key) Link to Axial skeleton via sternoclavicular joint (an
anterior joint) Lack of posterior attachment to the axial skeleton
allows for a wide ROM Functions to allow attachment areas for numerous
muscles that move the shoulder and elbow
![Page 3: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/3.jpg)
Landmarks
Borders superior, medial, lateral
Angles inferior, superior
Acromion process Spine of scapula Glenoid fossa Coracoid process (like a crow’s beak) Supraspinatus, Infraspinatus, Subscapular fossa
![Page 4: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/4.jpg)
Joints of theShoulder Girdle Sternoclavicular
sternum (manibrum) and clavicle arthrodial (gliding) joint ligaments
anterior sternoclavicular ligament posterior sternoclavicular ligament costoclavicular ligament interclavicular ligament
![Page 5: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/5.jpg)
Joints of theShoulder Girdle Acromioclavicular
Acromion Process of scapula and clavicle arthrodial (gliding) joint ligaments
coracoclavicular ligaments trapezoid ligament conoid ligament
superior & inferior acromioclavicular ligaments
![Page 6: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/6.jpg)
Joints of theShoulder Girdle Scapulothoracic Joint
Scapula and thoracic region not really synovial joint supported by muscles, not ligaments
![Page 7: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/7.jpg)
Movements allowed bythe Shoulder Girdle Abduction (Protraction) Adduction (Retraction) Inward (downward) rotation: inferior angle
moves medially Outward (upward) rotation Depression: inferior movement Elevation: superior movement
![Page 8: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/8.jpg)
Muscles of theShoulder Girdle Posterior
trapezius levator scapula rhomboids (major and minor)
Anterior pectoralis minor seratus anterior subclavius
![Page 9: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/9.jpg)
Trapezius (p134)
Origin: Superior nuchal line Occipital protuberance Ligamentum nuchae C7 and T12 vetebrae
![Page 10: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/10.jpg)
Trapezius
Insertion Lateral 1/3 of clavicle Acromion process of scapula Spine of scapula
![Page 11: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/11.jpg)
Trapezius
Action Scapula
adduction elevation depression outward rotation
Head extension / hyperextension rotation lateral flexion
![Page 12: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/12.jpg)
Levator Scapulae (p129)
Origin Transverse processes of the 1st four cervical
vertebrae Insertion
Vertebral (medial) border of the scapula above base of scapular spine
Action Scapula elevation, inward rotation, adduction
![Page 13: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/13.jpg)
Rhomboid Muscles (p131)
Origin Lower part of ligamentum nuchae Spinous process of the 7th cervical and 1st five
thoracic vert. Insertion
Vertebral border of the scapula
![Page 14: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/14.jpg)
Rhomboid Muscles
Action Scapular
adduction inward rotation elevation
![Page 15: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/15.jpg)
Serratus Anterior (p132)
Origin lateral, anterior surface of the upper 8/9 ribs
Insertion Anterior aspect of the vertebral border of the
scapula
![Page 16: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/16.jpg)
Serratus Anterior
Action Scapular
abduction outward rotation depression
![Page 17: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/17.jpg)
Pectoralis Minor (p130)
Origin Anterior surfaces of the 3rd - 5th ribs
Insertion Coracoid process of scapula
Action Rib elevation Scapular depression
![Page 18: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/18.jpg)
Subclavius (p133)
Origin Superior aspect of 1st rib (around costal cartilage)
Insertion Inferior groove mid-portion of clavicle
Action scapular depression stabilization of sternoclavicular jt.
![Page 19: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/19.jpg)
Summary
Shoulder Girdle bones: clavicle, scapula joints:
sternoclavicular acromioclavicular scapulothoracic
muscles anterior: pectoralis minor, serratus anterior, subclavius
posterior: levator scapulae, rhomboids, trapezius
![Page 20: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/20.jpg)
Shoulder Girdle
The arm travels through a wide range of movements, the scapula cooperates by placing the glenoid fossa in the most favorable position for the head of the humerus (scapulohumeral rhythm)
![Page 21: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/21.jpg)
Movements of the Shoulder Girdle Clavicle
elevation, depression protraction, retraction (or forward and backward horizontal
movements)
Scapula elevation, depression abduction, adduction inward and outward rotation
![Page 22: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/22.jpg)
Muscle Analysis Chart
Identify muscles that move the scapula abduction adduction elevation depression upward rotation downward rotation
![Page 23: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/23.jpg)
Muscles that move the scapula abduction
serratus anterior pectoralis minor
adduction trapezius (middle and lower fibers) rhomboids
![Page 24: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/24.jpg)
Muscles that move the scapula elevation
trapezius (upper & middle fibers) levator scapulae rhomboids (slight)
depression trapezius (lower fibers) pectoralis minor subclavius (clavicle depression)
![Page 25: Shoulder Girdle](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813665550346895d9df23b/html5/thumbnails/25.jpg)
Muscles that move the scapula outward rotation
trapezius (middle and lower fibers) serratus anterior
inward rotation rhomboids Levator scapulae