2 Posterior TA and SH Muscles PDF

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Summary

4 Anterior Thoracoappendicular Muscles4 Anterior Thoracoappendicular Muscles...

Description

Human Anatomy: Fall 2021

Posterior Thoracoappendicular and Scapulohumeral Muscles POSTERIOR THORACOAPPENDICULAR MUSCLES Superficial Posterior Thoracoappendicular (Extrinsic Shoulder) Muscles ORIGIN

Trapezius

Latissimus Dorsi

INSERTION

• • •

Base of skull Nuchal ligament Spinous processes of C7 – T12 vertebrae

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Spinous processes of lower 6 thoracic vertebrae Thoracolumbar fascia Iliac crest

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INNERVATION

ACTION

Lateral third of clavicle Acromion of scapula Spine of scapula Floor of intertubercular groove of humerus

Deep Posterior Thoracoappendicular (Extrinsic Shoulder) Muscles Levator Scapulae

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Transverse processes of C1 – C4 vertebrae

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Medial border of scapula—at level ABOVE spine of scapula

Rhomboid Minor

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Spinous processes of C7 and T1 vertebrae

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Medial border of scapula—at level of spine of scapula

Rhomboid Major

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Spinous processes of T2 – T5 vertebra

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Medial border of scapula—at level BELOW spine of scapula

SCAPULOHUMERAL (Intrinsic Shoulder) MUSCLES ORIGIN

Deltoid

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Teres Major

•

INSERTION

Lateral third of clavicle Acromion of scapula Spine of scapula

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Deltoid tuberosity of humerus

Posterior surface of scapula; inferior angle

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Medial lip of intertubercular groove of humerus

INNERVATION

ROTATOR CUFF MUSCLES Subscapularis

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Subscapular fossa of scapula

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Lesser tubercle of humerus

Supraspinatus

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Supraspinous fossa of scapula

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Greater tubercle of humerus; superior facet

Infraspinatus

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Infraspinous fossa of scapula

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Greater tubercle of humerus; middle facet

Teres Minor

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Lateral border of scapula, superior portion

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Greater tubercle of humerus; inferior facet

This reference table was prepared using Moore Essential Clinical Anatomy (6rd Edition, Moore, Agur and Dalley) as a reference.

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