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News and Articles on Arm Bone
Miniature T-Rex Dinosaur Ancestor Discovered in China, Scientists Report Sep 18, 2009
Similarities with the larger dinosaur include the same 29- percent size ratio for the humerus, or upper arm bone, versus the femur, or thigh bone, and enlarged olfactory bulbs within the skull indicating an advanced sense of smell, the paper said. The thinking has been that as tyrannosaurs developed truly giant size over time, they needed to modify their entire skeleton so that they could function as a predator at such a colossal size, Brusatte said. (Bloomberg -- UK)
Bony Anatomy of the Shoulder Girdle Jun 6, 2009
The true shoulder joint, or glenohumeral joint, is made up of the head of the humerus (the upper arm bone) nestling against the scapula (shoulder blade) in its glenoid fossa, a shallow depression at the outer top corner of the scapula ... The humerus, or upper arm bone, is a long bone with a classic knob at each end. (Suite101.com)
What is Muscular Dystrophy? Mar 8, 2009
In FSHD, as implied by the name, weakness develops in the muscles of the face, the scapula (or shoulder blade) and the humerus (the upper arm bone), but can also involve muscles in the lower leg. This disorder does not typically shorten lifespan and it has not yet been linked to mutations in a specific gene, but rather to a series of repeated DNA sequences found on chromosome 4. (Suite101.com)
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