The Shoulder Girdle

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The Shoulder Girdle

• Anatomy and Kinesiology
• 420024

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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
Elevation
Abduction
Upward Rotation
Downward Rotation
Depression
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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?