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What is the origin, insertion, innervation, and action of the trapezius?
- Origin: Medial third of superior nuchal line, External occipital protuberance, nuchal ligament, and Spinous processes of C7-T12 vertebrae
- Insertion: lateral third of clavicle, acromion, and spine of scapula
- Innervation: Spinal accessory
- Action: Superior fibers elevate, middle fibers retract, and inferior fibers depress scapula;Superior and inferior fibers act together in superior rotation of scapula (inferior angle outward)
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What is the origin, insertion, innervation, and action of the latissimus dorsi?
- Origin: spinous process of inferior 6 thoracic vertebra, thoracolumbar fascia, iliac crest, & inf. 3 or 4 ribs
- Insertion: floor of intertubercular groove of humerus
- Innervation: thoracodorsal nerve (C6, C7, C8)
- Action: extends, adducts, and medially rotates humerus & raises body toward arms during climbing.
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What is the origin, insertion, innervation and action of the splenius capitius?
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What is the origin, insertion, innervation, and action of the levator scapula?
- Origin: posterior tubercles of transverse processes of C1-C4 vertebra
- Insertion: superior part of medial border of scapula
- Innervation: dorsal scapular and cervical nerves
- Action: elevates scapula and tilts its glenoid cavity inferiorly by rotating scapula, also sidebends neck and rotates it to the same side
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What is the origin, inseration, innervation, and action of the rhomboid major?
- Origin: spinous process of T2-T5 vertebra
- Insertion: medial border of scapula from level of spine to inferior angle
- Innervation: dorsal scapular nerve (C5)
- Action: retract scapula, rotate inferior angle medially to depress glenoid cavity, & fix scapula to thoracic wall
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What is the origin, inseration, innervation, and action of the rhomboid minor?
- Origin: spinous process of C7 and T1
- Insertion: medial border of scapula from level of spine to inferior angle
- Innervation: dorsal scapular nerve (C5)
- Action: retract scapula, rotate inferior angle medially to depress glenoid cavity, & fix scapula to thoracic wall
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What is the origin, inseration, innervation, and action of the serratus posterior superior?
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What is the origin, inseration, innervation, and action of the serratus posterior inferior?
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What is the origin, inseration, innervation, and action of the posterior scalene?
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How many total vertebra are there and how many of each?
- 33 vertebrae
- cervical: 7
- thoracic: 12
- lumbar: 5
- sacral: 5
- coccyx: 4
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What is the difference between superficial and deep fascia?
- superficial fascia: deep to the skin and contains subcutaneous tissue, including variable amounts of fat
- deep fascia: surround the skeletal muscle
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