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The Shoulder Girdle
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Shoulder Girdle Bones Clavicle and Scapula Move as a unit
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Scapula Key Bony Landmarks (Palpate)
Glenoid Fossa Acromion Process- continuation of the spine of scapula and located at the lateral end of the clavicle Coracoid Process- located just below the lateral end of the clavicle Spine of Scapula Lateral Border Medial Border-vertebral border Inferior Angle Supraspinous Fossa- located superior to the spine of the scapula Infraspinous Fossa- located inferior to the spine of the scapula Students stand up and palpate key bony landmarks on each other
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Scapula Key Bony Landmarks
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Clavicle and Sternum Key Bony Landmarks
Sternal End-located proximal to sternum Acromial End-located proximal to scapula Sternum: Manubrium Body Xiphoid Process
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Scapulothoracic Joint
Not a true synovial joint No ligamentous support Supported dynamically and moves on the rib cage by two muscles; serratus anterior and subscapularis
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Sternoclavicular Joint
Clavicle articulates with sternum Synovial joint Very strong joint and dislocation is rare
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Acromioclavicular Joint
Acromion process of scapula articulates with clavicle Sustains great forces Commonly injured by collision sports such as hockey, football, rugby, horseback riding, mountain biking
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Glenohumeral Joint Scapula articulates with head of humerus
The joint contains a shallow socket called the glenoid fossa The glenoid fossa is only one-fourth the size of the humeral head
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Movements of the Shoulder Girdle
Protraction (Abduction) Retraction (Adduction) Upward Rotation Downward Rotation Elevation Depression Anterior Tilt
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Movements Focus on specific bony landmarks
inferior angle glenoid fossa acromion process Shoulder girdle movements = scapula movement
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Protraction (abduction)
scapula moves laterally away from spinal column Retraction (adduction) scapula moves medially toward spinal column Pair students up, perform movements of shoulder girdle while palpating scapula
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Upward Rotation turning glenoid fossa upward & moving inferior angle superolaterally away from spinal column Downward Rotation returning inferior angle inferomedially toward spinal column & glenoid fossa to normal position
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Elevation upward or superior movement, as in shrugging shoulders Depression downward or inferior movement, as in returning to normal position
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Anterior Tilt Rotational movement of scapula occurring during glenohumeral hyperextension Superior border moving anteroinferiorly & inferior angle moving posterosuperiorly
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Scapulohumeral Rhythm
The coordinated movements of the scapula, clavicle, and humerus Shoulder joint and shoulder girdle work together in carrying out upper extremity activities Glenohumeral movement requires the scapulothoracic, acromioclavicular, and sternoclavicular joints to also move
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Scapulohumeral Rhythm
Scapula rotates 1o for every 2o movement of the humerus (Overall 2:1 ratio of glenohumeral to scapulothoracic movement) The scapula rotates 60 degrees, the humerus abducts 120 degrees , totaling 180 degrees of abduction at the GH joint
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Shoulder Joint Shoulder Girdle
Flexion Upward Rotation and Elevation Extension Downward Rotation and Depression Abduction Upward Rotation Adduction Downward Rotation Horizontal Adduction Protraction Horizontal Abduction Retraction Medial Rotation Lateral Rotation
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Muscles that Move the Shoulder Girdle
5 muscles primarily involved in shoulder girdle movements All originate on axial skeleton and insert on scapula and/or clavicle Do not attach to humerus and do not cause shoulder joint actions Essential in providing dynamic stability of the scapula so it can serve as a relative base of support for shoulder joint activities such as throwing, batting, and blocking
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Muscles that Move the Shoulder Girdle
Posterior: Trapezius (upper, middle, and lower) Levator Scapula Rhomboids (minor and major) Anterior: Serratus Anterior Pectoralis Minor
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Trapezius Origins Upper Fibers: Occipital Bone (skull) and Spinous Process of C7 Middle Fibers: Spinous Process of T1-T5 Lower Fibers: Spinous Process of T6-T12 Ask students to abduct the shoulder and retract scapula to palpate
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Trapezius Insertions Upper Fibers: Lateral 1/3 of clavicle
Middle Fibers: Acromion Process of Scapula Lower Fibers: Root of the Spine of Scapula
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Trapezius Actions Upper Fibers: Elevation of Scapula Middle Fibers:
Retraction Upward Rotation of Scapula Lower Fibers: Depression Upward rotation of Scapula
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Trapezius Integrated Functions
Upper Fibers: Provide dynamic stability to the cervical spine and shoulder Middle Fibers: Eccentrically decelerates scapular protraction Assists in dynamically stabilizing the scapula Lower Fibers: Eccentrically decelerates scapular elevation
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Levator Scapula Origin: Transverse Process of C1-C4 Insertion:
Medial Border of Scapula Actions: Elevation of Scapula Downward Rotation of Scapula Extension of Head and Neck Most is deep to trapezius. When palpating relax trapezius. Downwardly rotate scapula and palpate superior to superior angle of scapula.
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Levator Scapula Integrated Functions
Assists in eccentric deceleration of depression and upward rotation of scapula Assists in eccentric deceleration of flexion of head and neck Assists in dynamic stabilization of the cervical spine and scapula
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Rhomboids Minor and Major
Origin: Minor: Spinous Process of C7-T1 Major: Spinous Process of T2-T5 Insertion: Minor: Root of the Spine of the Scapula Major: Between the Root of the Spine of the Scapula and the Inferior Angle of the Scapula Deep to trapezius. Downwardly rotate scapula and palpate between scapula and and spine (at level of inferior angle)
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Rhomboids Minor and Major Actions
Retraction of Scapula Downward Rotation of Scapula
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Rhomboids Minor and Major Integrated Functions
Assists in eccentric deceleration of scapular protraction and upward rotation of scapula Assists in stabilization of scapula
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Serratus Anterior Origin: Ribs 1-9 Insertion:
Anterior surface of the medial border of scapula Actions: Protraction of Scapula Upward Rotation of Scapula Much of it is deep to the scapula. Flex shoulder to 90 degrees. Between lateral borders of pec and lats and feel for the ribs and serratus anterior.
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Serratus Anterior Integrated Functions
Assists in eccentric deceleration of retraction of scapula Assists in stabilization of the scapula Helps to hold the scapulothoracic joint along the medial border of the scapula
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Pectoralis Minor Origin: Ribs 3-5 Insertion:
Coracoid Process of Scapula Actions: Protraction of Scapula Depression of Scapula Downward Rotation of Scapula
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Pectoralis Minor Integrated Functions
Assists in eccentric deceleration of retraction of scapula Assists in dynamic stabilization of the scapula
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Putting It All Together
Scapular Elevation: Upper Trapezius Levator Scapula Scapular Depression: Lower Trapezius Pectoralis Minor Scapular Protraction: Serratus Anterior Pectoralis Minor Scapuluar Retraction: Middle Trapezius Rhomboids
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Putting It All Together
Scapular Upward Rotation: Serratus Anterior Upper and Lower Trapezius Scapular Downward Rotation: Rhomboids Levator Scapula Pectoralis Minor
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Scapular Winging A winged scapula is a shoulder condition in which the scapula sticks out at the back, particularly when performing pushing exercises like the push up Common symptoms of a winged scapula include the following: Pain and limited shoulder elevation Difficulty in lifting weights Pressure on the scapula from a chair when sitting
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Scapular Winging A winged scapula can be caused by one of two reasons:
Damage to the long thoracic nerve of the shoulder. It may cause paralysis of the serratus anterior. Medical clearance is necessary before engaging in any exercise General weakness of the serratus anterior muscle. In this case, the winging scapula can be improved with corrective exercises designed to build strength in the weak serratus anterior muscle.
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Three corrective exercises may strengthen serratus anterior:
Scapular Winging Three corrective exercises may strengthen serratus anterior: Hand Walks, Arm Shuffle, Push Up Plus Pay careful attention to scapulohumeral rhythm and symmetry Maintain a stable pelvis and neck
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Hand Walks The pattern is one hand up, next hand up, one hand down, other hand down, repeat.
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Arm Shuffle Begin with your hands very wide. Shift your weight back and forth while simultaneously touching one hand on top of the other as shown
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Push Up Plus Once you have completed a push up, add the “plus” motion by protracting your scapula as much as possible without changing your spinal alignment. Hands should be shoulder width apart.
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Rounded Shoulders A common postural condition in which the scapula are protracted and depressed and the humeri are medially rotated When the trapezius muscles are weak they contribute to rounded shoulders because they are unable to efficiently oppose protraction of the scapula (especially if protractors pectoralis minor and serratus anterior are tight)
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Trapezius Tightness Whenever a phone is crimped between head and shoulder, it may cause tightness of the upper trapezius Whenever a purse or book bag is carried upon the shoulder, people subconsciously elevate the scapula on the side which it is carried. This causes the elevators to isometrically contract for long periods of time This is another common posture that may cause tightness of the upper trapezius
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Rhomboids and Pectoralis Minor
When rhomboids are weak they can contribute to rounded shoulders because they cannot oppose protraction and depression of the scapula When pectoralis minor is tight, they can contribute to rounded shoulders
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Scapular Depression on Bench
This is an exercise for individuals who need to work the lower traps, rhomboids, and serratus anterior muscles Maintain a tall posture throughout the exercise and good stability through the abdominal complex.
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Supine Row Lie under bar so that the bar is at mid-sternum level
Activate core by drawing in Perform row and lift body towards the bar The bar should meet the mid-sternum. Lower slowly AVOID retracting the scapula before pulling yourself up, it should be a smooth action through the scapulothoracic joint as you lift yourself towards the bar.
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Levator Scapula Stretch
In the proper posture sit on a ball or chair with a minimum of 90 degrees bend at the hips and knees Draw your belly button inward toward your spine Tuck your chin in and rotate the head in right direction of your opposite pocket while retracting and depressing shoulder of the side being stretched Hold for seconds, repeat for 2-3 reps
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Upper Trapezius Stretch
In optimal posture sit on the ball or bench with a minimum of 90 degree bend at the hips and knees. Draw your belly button inward toward your spine Tuck your chin in and slowly draw your left ear to your left shoulder until tension is felt Hold for seconds, repeat for 2-3 reps
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Foam Roll Rhomboids Draw your belly button inward toward your spine
Stabilize the head in “neutral” Roll mid-back area on the foam roll If a “tender point” is located, stop rolling, and rest on the tender point until pain decreases
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