Biomech exam 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Trapezius origin | base of skull
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| trapezius insertion | posterior lateral third of clavicle, triangular space at base of scapular spine
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| Innervation for trapezius | spinal accessory nerve (cranial nerve XI) and branches of C3, C4
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| Rhomboids origin | spinous process of seventh cervical (C7)l and first five thoracic vertebrae (T1-T5)
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| Rhomboids insertion | medial border of scapula below spine of scapula
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| Rhomboids innervation | dorsal scapular nerve (C5)
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| Latissimus dorsi origin | posterior crest of ilium, back of sacrum & spinous processes of lumbar and lower 6 thoracic vertebrae
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| Latissimus dorsi insertion | medial lip of intertubercular groove of humerus
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| Latissimus dorsi innervation | thoracodorsal nerve (C6-C8)
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| Deltoid anterior fibers origin | anterior lateral third of the clavicle
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| Deltoid middle fibers origin | lateral aspect of the acromion
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| Deltoid posterior fibers origin | inferior edge if spine of scapula
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| Deltoids insertion | deltoid tuberosity on the lateral humerus
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| Deltoids innervation | axillary nerve (C5, C6)
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| Pectoralis major UPPER fibers origin | medial half of anterior surface of clavicle
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| Pectoralis major LOWER fibers origin | anterior surface of costal cartilages of the first 6 ribs and adjacent potion or sternum
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| Pectoralis major insertion | flat tendon 2 or 3 inches wise to lateral lip of intertubercular groove of humerus
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| Pectoralis major UPPER fibers innervation | lateral pectoral nerve (C5-C7)
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| Pectoralis minor LOWER fibers innervation | medial pectoral nerve (C8, T1)
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