muscle attachments shoulder and arm

8/14/2019 Muscle Attachments Shoulder and Arm

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Muscle Attachments Shoulder and Arm

Bones and Bony Landmarks

Acromioclavicular Joint (AC)

Clavicle Coracoid Process Deltoid Tuberosity Greater Tubercle Inferior Angle Infraglenoid Tubercle Lateral Border Lesser Tubercle Medial Border Spine Of The Scapula Sternoclavicular Joint (SC)

Subscapular Fossa Superior Angle Supraspinous Fossa

Muscles

Biceps Brachii Coracobrachialis Deltoid Latissimus Dorsi Levator Scapula Pectoralis Major Pectoralis Minor Rhomboid Major Rhomboid Minor Serratus Anterior Subclavius Teres Major Trapezius Triceps Brachii


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Rotator Cuff Muscles:

Supraspinatus Infraspinatus Subscapularis Teres Minor

Biceps Brachii

Origin Short Head: Coracoid Process Of ScapulaLong Head: Supraglenoid Tubercle Of Scapula

Insertion Tuberosity Of The Radius And Aponeurosis Of The Biceps Brachii

Actions Flex The Elbow, Supinate The Forearm, Flex The Shoulder Joint

Coracobrachialis

Origin Coracoid Process Of Scapula

Insertion Medial Surface Of Middle Shaft OfHumerus

Actions Flex, Adduct The Should Joint

Deltoid

Origin Lateral One Third Of Clavicle, Acromion And Spine Of Scapula

Insertion Deltoid Tuberosity

Actions All Fibers: Abduct The Shoulder JointPosterior: Extend And Laterally Rotate The Shoulder JointAnterior: Flex And Medially Rotate The Shoulder Joint

Latissimus Dorsi

Origin Spinous Processes Of Last Six Thoracic Vertebrae, Last three or four ribs, ThoracolumbarAponeurosis, and Posterior Iliac Crest

Insertion Crest Of The Lesser Tubercle Of The Humerus

Actions Extend, Adduct, Medially Rotate The Shoulder Joint

Levator Scapula

Origin Transverse Processes Of 1st Thru 4th Cervical Vertebrae

Insertion Medial Border And Superior Angle Of Scapula

Actions Unilateral: Elevate, Downwardly Rotate The Scapula, Laterally Flex Head And NeckBilateral: Extend Head And Neck

Pectoralis Major


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Origin Medial Half Of Clavicle, Sternum, Cartilage Of Ribs One Thru Six

Insertion Crest Of Greater Tubercle Of Humerus

Actions As A Whole: Adduct, Medially Rotate The Shoulder Joint, May Assist In Elevating The thorax inforced inspirationUpper Fibers: Flex, Medially Rotate, Horizontally Adduct The Shoulder JointLower Fibers: Extend, Adduct The Shoulder Joint

Pectoralis MinorOrigin Third, Fourth And Fifth Ribs

Insertion Coracoid Process Of Scapula

Actions Depress, Abduct, Tilt The Scapula Anteriorly, Assist In Forced Inspiration

Rhomboid Major

Origin Spinous Processes Of T-2 To T-5

Insertion Medial Border Of The Scapula Between Spine And Inferior Angle

Actions Adduct, Elevate, Downwardly Rotate The Scapula

Rhomboid Minor

Origin Spinous Processes Of C-7 And T-1

Insertion Medial Border Of The Scapula Between Spine And Inferior Angle

Actions Adduct, Elevate, Downwardly Rotate The Scapula

Supraspinatus

Origin Supraspinous Fossa Of Scapula

Insertion Greater Tubercle Of Humerus

Actions Adduct Humerus, Stabilize Head Of Humerus In Glenoid Cavity

Infraspinatus

Origin Infraspinous Fossa Of ScapulaInsertion Greater Tubercle Of Humerus

Actions Laterally Rotate, Adduct, Extend The Shoulder Joint, Stabilize Head of Humerus in Glenoid Cavity

Subscapularis

Origin Subscapular Fossa Of The Scapula

Insertion Lesser Tubercle Of The Humerus


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Actions Medially Rotate The Shoulder Joint, Stabilize Head of Humerus in Glenoid Cavity

Teres Minor

Origin Superior Half Of Lateral Border Of Scapula

Insertion Greater Tubercle Of Humerus

Actions Laterally Rotate, Adduct, Extend Shoulder Joint, Stabilize Head of Humerus in Glenoid Cavity

Serratus Anterior

Origin Surfaces Of Upper 8 Or 9 Ribs

Insertion Anterior Surface Of Medial Border Of Scapula

Actions With Origin Fixed: Abduct The Scapula, Hold Medial Border Of Scapula Against Rib CageScapula Stabilized: May Act In Forced Inspiration

Subclavius

Origin First Rib And Cartilage

Insertion Inferior, Lateral Aspect Of The Clavicle

Actions Draws Clavicle Down And Forward, Elevates 1st Rib, Stabilizes The Sternoclavicular Joint

Teres Major

Origin Dorsal Surfaces Of Inferior Angle And Lower Half Of Lateral Border ofScapula

Insertion Crest Of The Lesser Tubercle Of The Humerus

Actions Extend, Adduct, Medially Rotate The Humerus

Trapezius

Origin External Occipital Protuberance, Medial Portion Of Superior Nuchal Line of Occiput, LigamentumNuchae and Spinous Processes of C-7 Through T-12

Insertion Lateral Portion Of Clavicle, Acromion And Spine Of Scapula

Actions Upper: Bilateral: Extend The Head And Neck Unilateral: Extend, Laterally Flex, Rotate Head And Neck To Opposite Side, Elevate,

Upwardly Rotate the ScapulaMiddle: Adduct, Stabilize The ScapulaLower: Depress, Upwardly Rotate The Scapula


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Triceps Brachii

Origin Long Head: Infraglenoid Tubercle Of ScapulaLateral Head: Posterior Surface Of Proximal Half OfHumerusMedial Head: Posterior Surface Of Distal Half Of Humerus

Insertion Olecranon Process Of Ulna

Actions All Heads: Extend The ElbowLong Head: Extend, Adduct The Shoulder Joint

muscle attachments shoulder and arm

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