Anatomy - Upper Limbs, Superficial Back, Scapular Region
Terms
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- Trapezius Proximal Attachments
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1.Occipital Bone: Superior Nuchal Line, External Occipital Pertuberance
2. Ligamentum Nuchae
3. C7-T12 Spinous Processes - Trapezius Distal Attachments
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1. Lateral Posterior 1/3 of Clavicle
2. Scapula: Acromion, Spine - Trapezius Innervations
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1. Spinal Accessory Nerve XI
2. C3 & C4 Spinal Nerves - Trapezius Actions
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1. Upper Fibers: Scapula Elevation and Upward Rotation
2. Middle Fibers: Scapula Retraction
3. Lower Fibers: Scapula Depression and Upward Rotation - Latissimus Dorsi Proximal Attachments
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1. T7-T12 Spinous Processes
2. Thoracolumbar Fascia
3. Posterior Part of Ribs 9-12
4. Ilium- Iliac Crest - Latissimus Dorsi Distal Attachments
- 1. Ground of the Humoral Intertuburcular Groove
- Latissimus Dorsi Innervation
- 1. Thoracodorsal Nerve (C6-C8)
- Latissimus Dorsi Action
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1. Shoulder Extension
2. Shoulder Medial Rotation
3. Shoulder Adduction
4. Brings body to arms when climbing - Levator Scapulae Proximal Attachments
- 1. C1-C4 Transverse Processes
- Levator Scapulae Distal Attachments
- 1. Scapula Posterior Surface Medial border at the Root of the Spine
- Levator Scapulae Innervation
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1. Dorsal Scapular Nerve
2. C3 & C4 Spinal Nerves - Levator Scapulae Actions
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1. Scapula Elevation
2. Scapula Downward Rotation - Rhomboid Minor Proximal Attachments
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1. Ligamentum Nuchae
2. CV7 - TV1 Spinous Processes - Rhomboid Minor Distal Attachments
- 1. Scapula- Posterior surface of medial border at root of the spine
- Rhomboid Minor Innervation
- 1. Dorsal Scapular Nerve (C4 & C5)
- Rhomboid Minor Action
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1. Scapula Retraction
2. Scapula Downward Rotation
3. Stabalizes Scapula against thoracic wall - Rhomboid Major Proximal Attachment
- 1. TV2 - TV5 Spinous Processes
- Rhomboid Major Distal Attachment
- 1. Scapula- Posterior surface of medial border from root of spine to inferior angle
- Rhomboid Major Innervation
- 1. Dorsal Scapular Nerve (C4 & C5)
- Rhomboid Major Action
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1. Scapula Retraction
2. Scapula Downward Rotation
3. Stabilizes Scapula against Thoracic wall - Deltoid Proximal Attachment
- 1. Clavicle - Deltoid Tubercle
- Deltoid Distal Attachment
- 1. Humerus Deltoid Tuberosity
- Deltoid Innervation
- 1. Axillary Nerve
- Deltoid Action
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1. Anterior Fibers: Shoulder Medial Rotation and Flexion
2. Medial Fibers: Shoulder Abduction
3. Posterior Fibers: Shoulder Extension and Lateral Rotation - Teres Major Proximal Attachment
- 1. Scapula Posterior Surface of Inferior Angle
- Teres Major Distal Attachment
- 1. Humerus medial lip of intertubercular groove
- Teres Major Innervation
- 1. Lower Subscapular Nerve
- Teres Major Action
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1. Shoulder adduction
2. Shoulder extension
3. Shoulder Medial Rotation
4. Holds humeral head in glenoid cavity - Supraspinatus Proximal Attachment
- 1. Scapula- Supraspinous Fossa
- Supraspinatus Distal Attachment
- 1. Humerus Superior Facet on Greater Tubercle
- Supraspinatous Innervation
- 1. Suprascapular Nerve
- Supraspinatous Action
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1. Initates and Assists Deltoid in Shoulder Abduction
2. Holds Humeral head in glenoid cavity of scapula - Infraspinatous Proximal Attachment
- 1. Scapula Infraspinous Fossa
- Infraspinatous Distal Attachment
- 1. Humerus middle facet of greater tubercle
- Infraspinatous Innervation
- 1. Suprascapular Nerve
- Infraspinatous Actions
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1. Shoulder Lateral Rotation
2. Holds Humeral head in glenoid cavity - Teres Minor Proximal Attachment
- 1. Scapula middle part of lateral border
- Teres Minor Distal Attachment
- 1. Humerus Inferior facet on greater tubercle
- Teres Minor Innervation
- 1. Axillary Nerve
- Teres Minor Action
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1. Shoulder Lateral Rotation
2. Holds Humeral head in glenoid cavity - Subscapularis Proximal Attachment
- 1. Scapula Subscapular Fossa
- Subscapularis Distal Attachment
- 1. Humerus Lesser Tubercle
- Subscapularis Innervation
- 1. Upper and Lower Subscapular Nerves
- Subscapularis Action
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1. Shoulder Medial Rotation
2. Holds humeral head in glenoid cavity