Origins, Insertions, Actions and Inervations of Shoulder Muscles
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| show | O:Lateral third of the clavicle
I:Deltoid tuberosity
A:Shoulder abd, flexion, IR, horizontal add
N:Axillary nerve (C5,C6)
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| show | O:Acromion process
I:Deltoid tuberosity
A:Shoulder abduction
N:Axillary nerve (C5,C6)
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| show | O:Spine of scapula
I:Deltoid tuberosity
A:Shoulder abd, extension, hyperextension, ER, horizontal abd
N:Axillary nerve (C5,C6)
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| show | O:Supraspinous fossa of scapula
I:Greater tubercle of humerus
A:Shoulder abduction
N:Suprascapular nerve (C5,C6)
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| Pectoralis Major, Clavicular Portion | show 🗑
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| Pectoralis Major, Sternal Portion | show 🗑
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| Pectoralis Major, Sternal and Clavicular Portions | show 🗑
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| show | O:Spinous processes of T7-L5, posterior surface of sacrum, illiac crest, and lower three ribs
I:Medial lip of biciptal groove of humerus
A:Shoulder extension, add, IR, hyperextension
N:Thoracodorsal nerve(C6,C7,C8)
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| show | O:Axillary border of scapula near inferior angle
I:Crest below lesser tubercle next to the latissimus dorsi muscle attachment
A:Shoulder extension, adduction, and IR
N:Subscapular nerve (C5,C6)
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| Infraspinatus | show 🗑
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| Teres Minor | show 🗑
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| Subscapularis | show 🗑
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| Coracobrachialis | show 🗑
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| show | O:Occipital bone, nuchal ligament on cervial spinous processes
I:Outer third of clavicle, acromion process
A:Scapular elevation and upward rotation
N:Spinal accessory (cranial nerve XI)
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| Middle Trapezius | show 🗑
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| show | O:Spinous processes of middle and lower thoracic vertebrae T4-T12
I:Base of the scapular spine
A:Scapular depression and upward rotation
N:Spinal accesory (cranial nerve XI)
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| Levator Scapula | show 🗑
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| show | O:Spinous processes of C7 through T5
I:Vertebral border of scapula between the spine and inferior angle
A:Scapular retraction, elevation, and downward rotation
N:Dorsal scapular nerve (C5)
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| Serratus Anterior | show 🗑
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| show | O:Anterior surface of third through fifth ribs
I:Coracoid process of the scapula
A:Scapular depression, protraction, downward rotation, and tilt
N:Medial pectoral nerve (C8,T1)
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| 1 | show 🗑
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paro75
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