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The Shoulder Girdle. Anatomy and Kinesiology 420:024. Objectives. Bones, bony landmarks and joints Muscles Movements. The Shoulder Girdle. The scapula and clavicle Two joints Functions Dynamic stability Increased ROM. Bones.
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The Shoulder Girdle Anatomy and Kinesiology 420:024
Objectives • Bones, bony landmarks and joints • Muscles • Movements
The Shoulder Girdle • The scapula and clavicle • Two joints • Functions • Dynamic stability • Increased ROM
Bones From Seeley RR, Stephens TD, Tate P; anatomy and physiology, ed 7, New York, 2006, McGraw-Hill
Bones From Seeley RR, Stephens TD, Tate P; anatomy and physiology, ed 7, New York, 2006, McGraw-Hill
Joints • Shoulder girdle (scapulothoracic) • Scapula moves on the rib cage • Joint motion occurs at sternoclavicular joint & to a lesser amount at the acromioclavicular joint
Joints • Sternoclavicular (SC) • (Multiaxial) arthrodial/gliding classification • Movements • Anteriorly with protraction • Posteriorly with retraction • Superiorly with elevation • Inferiorly with depression
Joints • Acromioclavicular (AC) • Arthrodial/gliding classification • Movements • Some gliding & rotational motion accompanying other shoulder girdle & shoulder joint motions • Often injured
Objectives • Bones, bony landmarks and joints • Muscles • Movements
Muscles • Five muscles primarily involved in shoulder girdle movements • All originate on axial skeleton & insert on scapula and/or clavicle • Do not attach to humerus & do not cause shoulder joint actions • Functions: • Stability • ROM of shoulder joint
Shoulder Girdle Muscles • Five muscles primarily involved in shoulder girdle movements • Trapezius - upper, middle, lower • Rhomboid - deep • Levator scapula • Serratus anterior • Pectoralis minor - deep
Objectives • Bones, bony landmarks and joints • Muscles • Movements
Movements • Focus on specific bony landmarks • inferior angle • glenoid fossa • acromion process • Shoulder girdle movements = scapula movements
Movements • Elevation • Depression
Movements • Abduction (protraction) • Adduction (retraction)
Movements • Upward rotation • Downward rotation
Adduction Elevation Shoulder GirdleMovements Abduction Upward Rotation Downward Rotation Depression
Movements • Anterior tilt (upward tilt) • Posterior tilt (downward tilt)
Movements • Lateral tilt (outward tilt) • Medial tilt (return from lateral tilt, inward tilt)
Movements • Shoulder joint & shoulder girdle work together • Shoulder girdle movement independent • Upward/downward rotation? • Shoulder girdle muscles • Stabilize scapula • Enhance ROM of shoulder joint
ELEVATION • Proximal attachment: Above or below scapula/clavicle? • How many muscles fit this criteria?
DEPRESSION • Proximal attachment: Above or below scapula/clavicle? • How many muscles fit this criteria?
RETRACTION • Proximal attachment: In front (ribs) or behind (spine)? • How many muscles fit this criteria?
PROTRACTION • Proximal attachment: In front (ribs) or behind (spine)? • How many muscles fit this criteria?
UPWARD ROTATION • Upward or downward torque? • How many muscles fit this criteria?
DOWNWARD ROTATION • Upward or downward torque? • How many muscles fit this criteria?