the shoulder girdle anatomy and kinesiology 420:024
TRANSCRIPT
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
Trapezius
Levator Scapulae
Rhomboids
Serratus Anterior
Pectoralis Minor
Subclavius
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
Shoulder GirdleMovements
ElevationElevation
DepressionDepression
AbductionAbductionAdductionAdduction
UpwardUpward
RotationRotation
Downward
DownwardRotation
Rotation
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?