Critical period window for spectral tuning defined in the primary auditory cortex (A1) in the rat
- Author(s): de Villers-Sidani, Etienne
- Chang, Edward F
- Bao, Shaowen
- Merzenich, Michael M
- et al.
Experience-dependent plasticity during development results in the emergence of highly adapted representations of the external world in the adult brain. Previous studies have convincingly shown that the primary auditory cortex (A1)of the rat possesses a postnatal period of sensory input-driven plasticity but its precise timing ( onset, duration, end) has not been defined. In the present study, we examined the effects of pure-tone exposure on the auditory cortex of developing rat pups at different postnatal ages with a high temporal resolution. We found that pure-tone exposure resulted in profound, persistent alterations in sound representations in A1 only if the exposure occurred during a brief period extending from postnatal day 11 (P11) to P13. We also found that postnatal sound exposure in this epoch led to striking alterations in the cortical representation of sound intensity.
Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.