<P> The position and relations of the pharyngeal opening are described with the nasal part of the pharynx . The mucous membrane of the tube is continuous in front with that of the nasal part of the pharynx, and behind with that of the tympanic cavity; it is covered with ciliated pseudostratified columnar epithelia and is thin in the osseous portion, while in the cartilaginous portion it contains many mucous glands and near the pharyngeal orifice a considerable amount of adenoid tissue, which has been named by Gerlach the tube tonsil . </P> <P> There are four muscles associated with the function of the Eustachian tube: </P> <Ul> <Li> Levator veli palatini (innervated by the vagus nerve) </Li> <Li> Salpingopharyngeus (innervated by the vagus nerve) </Li> <Li> Tensor tympani (innervated by the mandibular nerve of CN V) </Li> <Li> Tensor veli palatini (innervated by the mandibular nerve of CN V) </Li> </Ul> <Li> Levator veli palatini (innervated by the vagus nerve) </Li>

Where does each middle ear muscle arise from and each attach to