Summary
Appreciable amounts of substance P (SP) were found in guinea pig cochleas. The highest values were found in the postnatal period. Data presented favor the assumption of SP acting as a neuromodulator or neurotransmitter in the inner ear.
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Nowak, R., Zelck, U., Rathsack, R. et al. Postnatal development of substance P in the inner ear of the guinea pig. Eur Arch Otorhinolaryngol 247, 147–148 (1990). https://doi.org/10.1007/BF00175964
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DOI: https://doi.org/10.1007/BF00175964