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cervical rib

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson 0.06 sec.
cervical rib
n.
A supernumerary rib articulating with a cervical vertebra, usually the seventh, but not reaching the sternum in front.
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When Dinocephalosaurus thrust forward its head to capture prey, muscles that connected the cervical ribs to the neck vertebrae contracted, splaying the ribs and increasing the internal diameter of the animal's esophagus, says Rieppel.
Big gulp? Neck ribs may have given aquatic beast unique feeding style by Perkins, S. / Science News
Cervical rib is a congenital phenomenon that usually occurs in association with upper-limb neurovascular symptoms.
Tracheostomy in patients with cervical rib: a note of caution by Raman, Rajagopalan / Ear, Nose and Throat Journal
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