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Definition
origin: external occipital protuberance medial 1/3 sup nuchal line C2-C7 spinous processes (via ligamentum nuchae) insertion: lateral 1/3 clavicle action: neck extension, neck lateral flexion, neck rotation, scapular elevation (shrug), scapular retraction, scapular upward rotation innervation: spinal accessory CN XI C3 C4 (sensory) |
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Definition
origin: T1-T6 via ligamentum nuchae insertion: medial margin of acromion, spine of scapula action: scapular retraction innervation: spinal accessory CN XI C3 C4 sensory
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Definition
origin: T7-T12 spinous processes (via ligamentum nuchae) insertion: medial border of scapular spine action: scapular depression, scapular upward rotation, retraction innervation: spinal accessory CN XI C3 C4 sensory
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Term
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Definition
origin: thoracolumbar fascia, spinous processes T6-L5, sacrum/iliac crest, lower 3-4 ribs insertion: bicipital groove action: shoulder extension, shoulder adduction, shoulder internal rotation nerve: thoracodorsal
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Term
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Definition
- comes from posterial cord of brachial plexus - usually damaged during surgical procedures (i.e. during breast cancer surgery) - causes weakness to latissimus dorsia
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Term
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Definition
origin: spinous processes T2-T5 insertion: medial border of scapula between scapular spine and inferior angle action: scapular retraction, scapular elevation, scapular downward rotation nerve: dorsal scapular
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Term
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Definition
origin: C7-T1 spinous processes insertion: medial border of scapula at level of spine action: scapular retraction, scapular elevation, scapular downward rotation nerve: dorsal scapular
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Term
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Definition
origin: C1-C4 transverse processes insertion: superior angle and upper medial border of scapula action: scapular elevation, scapular downward rotation, lateral neck flexion, neck extension (bilaterally) nerve: dorsal scapular
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Term
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Definition
Borders: 1. Latissimus Dorsi 2. Trapezius 3. Rhomboid Major Enlarges when the arm is drawn across the body Location for stethescope placement for respiratory sound examination (no muscle in the way)
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Term
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Definition
Borders: 1. Iliac crest 2. External oblique 3. Latissimus dorsi On rare occassions, it is the sight of "lumbar hernia"
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