1989 年 20 巻 1 号 p. 235-236
The postnatal development of substance P immunoreactivity in the acoustic nerve nucleus (ANN) of ddY mice were investigated. Up to day 13 after birth, no substance P immunoreactivity could be observed, but it appeared on day 16 in the cell bodies of the ANN of all specimens examined up to day 50. The significance of this finding was discussed.