shoulder complex anatomy

IAP Musculoskeletal Series

Christian Orense, PTRP

The Shoulder Complex

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BONES FORMING THE SHOULDER GIRDLE

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Clavicle• S-shaped, strut bone

• Medial 1/3 convex anteriorly

• Round Sternal end

• Flat Acromial EndWednesday, January 18, 12

Scapula

• shoulder blade, located between T2-T7

• Acromion Process- highest point

• Receptacle for humerus

• Point of origin and insertion of several muscles

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Bony Landmarks

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Bony Landmarks of the Scapula (Posterior View)

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3Wednesday, January 18, 12

Bony Landmarks of the Scapula (Anterior View)

3

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Lateral View of the

Scapula

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Humerus

• longest, largest bone of the UE

• Articulates proximally with the scapula, distally with the ulna and radius

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The 6 Joints of the Shoulder Complex

• Glenohumeral

• Acromioclavicular

• Sternoclavicular

• Suprahumeral

• Bicipital Groove

• Scapulothoracic

3 True Joints 3 Functional Joints

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Acromioclavicular Joint

• Bony Articulations

• Type of Joint

• Degrees of Freedom

• Motions

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Glenohumeral Joint

• Bony articulations

• Type of Joint

• Degrees of Freedom

• Motions

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Sternoclavicular Joint

• Bony articulations

• Type of Joint

• Degrees of Freedom

• Motions

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MUSCLES OF THE UE CONNECTING TO

• THE THORAX

• THE VERTEBRAL COLUMN

• SCAPULA TO HUMERUS

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MUSCLES: UE TO THE THORACIC WALL

• PECTORALIS MAJOR• PECTORALIS MINOR• SUBCLAVIUS• SERRATUS ANTERIOR

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UE TO THORACIC WALL

SUBCLAVIUS

PECTORALIS MINOR

PECTORALIS MAJOR

SERRATUS ANTERIOR

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MM: UE TO THE VERTEBRAL COLUMN

• TRAPEZIUS• LATISSIMUS DORSI• LEVATOR SCAPULAE• RHOMBOID MINOR &

MAJOR

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TO VERTEBRAL COLUMN

TRAPEZIUS

RHOMBOID MINOR

RHOMBOID MAJOR

LATISSIMUS DORSIWednesday, January 18, 12

SCAPULA TO HUMERUS

• DELTOID• SUPRASPINATUS• INFRASPINATUS• TERES MAJOR• TERES MINOR• SUBSCAPULARIS

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MUSCLES ATTACHED TO THE HUMERUS & SCAPULA

• BICEPS BRACHII• BRACHIALIS• TRICEPS BRACHII• CORACOBRACHIALIS

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DELTOID

PECTORALIS MAJOR

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SUPRASPINATUS

INFRASPINATUS

TERES MINOR TERES

MAJOR

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BRACHIAL PLEXUS

• NERVES THAT ARE ABOUT TO ENTER THE UPPER LIMB

• FORMED IN THE POSTERIOR TRIANGLE OF THE NECK• PROVIDING SENSORY AND

MOTOR INNERVATION

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BRACHIAL PLEXUS

• DIVIDED INTO:• ROOTS• TRUNKS• DIVISIONS• CORDS

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THE BRACHIAL PLEXUS

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LET’S HAVE A REVIEW

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JOINTS

• ARTICULATING SURFACES

• TYPE

• MOTIONS

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MUSCLE GROUPS

• FLEXORS

• EXTENSORS

• ABD/ADDUCTORS

• IR/ER

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