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Utilizing a sciatic nerve-transection model in rats, we studied the collagen content of normal control nerves, the long-term collagen accummulation in the distal stump of the transected nerve, the content of collagen of the posterior tibial nerve distal to the transection, and the myofibrosis of the
Hereditary medullary thyroid carcinoma, a tumor that arises from the parafollicular cells of the thyroid gland, occurs in isolation (as in familial medullary thyroid carcinoma), in association with hyperparathyroidism and pheochromocytoma (as in multiple endocrine neoplasia type 2A), or in
Adult goldfish had one tectal lobe removed surgically, and several months later, the eye contralateral to the missing tectum was injected with radioactive proline. Radioautographs of the brains were studied to trace the paths and termination sites of the optic fibers. The optic tract decussated at