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November 1944


Arch Otolaryngol. 1944;40(5):385-395. doi:10.1001/archotol.1944.00680020485004

During the development of the embryo certain anlages tend to carry with them to maturity some of the more important collateral systems which are destined to provide the mature parts with some of their most important physiologic functions. This tendency is noted particularly in the nerve supply of the muscles derived from the branchial arches. The trigeminal nerve supplies the muscles derived from the first branchial arch, the facial nerve supplies the muscles derived from the second branchial arch, while the glossopharyngeal and the vagus nerves innervate those derived from the third and fourth branchial arches. A good example of this is the derivation of the tensor tympani muscle from the first branchial arch and its innervation by the trigeminal, while the nearby stapedius muscle is derived from the second arch and is innervated by the facial nerve.1

The best example of this developmental principle found in the lymphatic system

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