![]() It forms the medial boundary of the great scapular notch, which serves to connect the supra- and infraspinatous fossae. Magnetic resonance imaging lumbosacral spine (MRI LS Spine) is a test that produces detailed images of the lumbar area (lower part of the spine), sacrum (base of the spine) and the coccyx (the tailbone). ![]() Thoracic (upper to mid back) Twelve vertebrae, T1 to. The lateral border, or base, the shortest of the three, is slightly concave its edge, thick and round, is continuous above with the under surface of the acromion, below with the neck of the scapula. Regions of the spine Cervical (neck) Seven vertebrae, which in descending order are named C1 to C7. The interval between the lips is subcutaneous and partly covered by the tendinous fibers of these muscles.The deltoideus is attached to the whole length of the inferior lip.The trapezius is attached to the superior lip, and a rough tubercle is generally seen on that portion of the spine which receives the tendon of insertion of the lower part of this muscle.Of the three borders, the anterior is attached to the dorsal surface of the bone the posterior, or crest of the spine, is broad, and presents two lips and an intervening rough interval. Its inferior surface forms part of the infraspinatous fossa, gives origin to a portion of the infraspinatus, and presents near its center the orifice of a nutrient canal.Its superior surface is concave it assists in forming the supraspinatous fossa, and gives origin to part of the supraspinatus.It presents two surfaces and three borders.
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