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24 Cards in this Set
- Front
- Back
Axial Skeleton vs. Appendicular Skeleton
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bones of head, neck and trunk vs. limbs and shoulders
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Sternoclavicular Joint
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Joint that merges sternum and the clavicle; strong rarely dislocates; minimal movement
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Manubrium
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broad upper part of sternum
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Fracture of the clavicle; where does it fracture, what happens (three things)
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80% of fractures in middle third, sternocleidomastoid (SCM) muscle pulls part of clavicle up; shoulder drops since traps cant hold it up; humerous pulled medially by pectoralis
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Parts of dorsal scapula (three)
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supraspinous, spine of the scapula and infraspinous
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Anterior scapula
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subscpular fossa
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Spine of scapula
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projects dorsally from body; meets to form with acromion
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coracoid process
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part of scapula, forward and laterally, muscle attachment site
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suprascapular notch
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top of scapula, suprascapular nerve goes through opening formed here
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spinoglenoid notch (a.k.a. greater scapular notch)
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located at the lateral free edge of the spine
traversed by the suprascapular nerve and artery (headed to infrapsinatus muscle) |
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glenoid cavitiy
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articulates with the head of the humerus to form the glenohumeral joint
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supraglenoid and infraglenoid tubercles
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important muscle attachment sites
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acrimioclaviculur joint
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articulation of acromion end of clavicle and scapula; AC liagment, and coracoclavicular laigment (trapezious ligament and conoid ligament)
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Shoulder seperation
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AC joint seperation; AC joint is relatively weak (to allow mobility)
most support of joint comes from coracoclavicular ligament After separation, weight of the arm displaces clavicle from acromion |
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Superficial, intermediate and deep back muscles
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superficial and intermediate are extrinsic and deep are intrinsic back muscles; innervated by anterior rami (extrnisic) and anterior rami of spinal nerves
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Trapezius Origin/insertion/innervation
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Takes origin from the occipital bone, nuchal ligament, and the spinous processes of vertebrae C7-T12.
Inserts into the lateral 1/3 of the clavicle, acromion, and spine of the scapula. Innervated by the accessory nerve (cranial nerve XI). |
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Trapezius Function
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Acts to suspend the shoulder girdle, elevate and depress the scapula, rotate the glenoid cavity upward, and retract the scapula.
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Latissmus Dorsi Origin/insertion/innervation
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Takes origin from the spinous processes of the inferior 6 thoracic vertebrae, the thoracolumbar fascia, the posterior 1/3 of the iliac crest, and inferior 3 or 4 ribs.
Inserts into the intertubercular groove of the humerus; Innervated by the thoracodorsal nerve (C6-C8). |
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Latissmus Dorsi Function
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Extends, adducts, and medially rotates the humerus; it also raises the body toward the arms during climbing.
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Levator Scapulae Origin/insertion/innervation
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Takes origin from the transverse processes of vertebrae C1-C4.
Inserts into the medial border of the scapula superior to the root of the spine; Innervated by the dorsal scapular nerve (C5) and spinal nerves C3-C4. |
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Levator Scapulae
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Elevates the scapula and tilts its glenoid cavity inferiorly by rotating the scapula.
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Rhomboid Major/minor Origin/insertion/innervation
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Take origin from the nuchal ligament and the spinous processes of C7-T1 vertebrae (r. minor) and the spinous processes of T2-T5 vertebrae (r. major).
Insert on the triangular area at the medial end of the scapular spine (r. minor) and the medial border of the scapula between the spine and the inferior angle (r. major). innervated by dorsal scapular nerve |
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Rhomboid function
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Retract scapula and rotate it to depress glenoid cavity; also fix scapula to thoracic wall.
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Serratus Posterior/Interior Origin/insertion/innervation
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Respitory in nature; Serratus posterior superior passes from the nuchal ligament and the spinous processes of vertebrae C7-T3 to ribs 2-5. It elevates the upper ribs.
Serratus posterior inferior passes from the spinous processes of vertebrae T11-L2 to ribs 9-12. It depresses the lower ribs. innervated by anterior rami of spinal nerves |