We will present two posters in Honolulu Hawaii:

1) "Against broadening with sound level." This work is based on the responses of single auditory nerve fibers. Their firing patterns offer insight to the cochlea's mechanical response properties. We present analyses of responses to broadband noise which suggest the level dependence of filter bandwidth is not as severe as previously thought when assessed using tone stimuli.

2) "In-vivo intra-cellular characterization of 'OFF' responses in the superior para-olivary nucleus." The superior para-olivary nucleus is an 'OFF' channel in the auditory brainstem: the neurons fire at sound offset but are silent during sound presentation. Sound-evoked inhibition is the hypothesized mechanism. We tested this with intra-cellular recordings in-vivo (whole-cell patch and sharp electrode penetrations). We characterized the patterns, timing and strength of inhibitory post-synaptic events and retrieved several cells anatomically by labelling with biocytin.