The Shoulder Girdle

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The Shoulder Girdle Anatomy and Kinesiology 420:024

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 Presentation

Transcript of The Shoulder Girdle

Page 1: The Shoulder Girdle

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?