the shoulder girdle
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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The Shoulder Girdle
Anatomy and Kinesiology
420:024
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Objectives
Bones, bony landmarks and joints Muscles Movements
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The Shoulder Girdle
The scapula and clavicle Two joints Functions
Dynamic stability Increased ROM
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Bones
From Seeley RR, Stephens TD, Tate P; anatomy and physiology, ed 7, New York, 2006, McGraw-Hill
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Bones
From Seeley RR, Stephens TD, Tate P; anatomy and physiology, ed 7, New York, 2006, McGraw-Hill
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Joints
Shoulder girdle (scapulothoracic) Scapula moves on the rib cage Joint motion occurs at sternoclavicular joint & to a
lesser amount at the acromioclavicular joint
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Joints Sternoclavicular (SC)
(Multiaxial) arthrodial/gliding classification
Movements Anteriorly with
protraction Posteriorly with
retraction Superiorly with
elevation Inferiorly with
depression
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Joints
Acromioclavicular (AC) Arthrodial/gliding
classification
Movements Some gliding & rotational
motion accompanying other shoulder girdle & shoulder joint motions
Often injured
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Objectives
Bones, bony landmarks and joints Muscles Movements
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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
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Shoulder Girdle Muscles
Five muscles primarily involved in shoulder girdle movements Trapezius - upper,
middle, lower Rhomboid - deep Levator scapula Serratus anterior Pectoralis minor - deep
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Trapezius
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Levator Scapulae
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Rhomboids
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Serratus Anterior
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Pectoralis Minor
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Subclavius
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Objectives
Bones, bony landmarks and joints Muscles Movements
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Movements
Focus on specific bony landmarks inferior angle glenoid fossa acromion process
Shoulder girdle movements = scapula movements
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Movements
Elevation
Depression
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Movements
Abduction (protraction)
Adduction (retraction)
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Movements
Upward rotation
Downward rotation
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Shoulder GirdleMovements
ElevationElevation
DepressionDepression
AbductionAbductionAdductionAdduction
UpwardUpward
RotationRotation
Downward
DownwardRotation
Rotation
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Movements
Anterior tilt (upward tilt)
Posterior tilt (downward tilt)
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Movements
Lateral tilt (outward tilt)
Medial tilt (return from lateral tilt, inward tilt)
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Movements
Shoulder joint & shoulder girdle work together Shoulder girdle movement independent
Upward/downward rotation? Shoulder girdle muscles
Stabilize scapula Enhance ROM of shoulder joint
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ELEVATION
Proximal attachment: Above or below scapula/clavicle?
How many muscles fit this criteria?
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DEPRESSION
Proximal attachment: Above or below scapula/clavicle?
How many muscles fit this criteria?
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RETRACTION
Proximal attachment: In front (ribs) or behind (spine)?
How many muscles fit this criteria?
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PROTRACTION
Proximal attachment: In front (ribs) or behind (spine)?
How many muscles fit this criteria?
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UPWARD ROTATION
Upward or downward torque?
How many muscles fit this criteria?
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DOWNWARD ROTATION
Upward or downward torque?
How many muscles fit this criteria?