Directionality and frequency tuning of primary saccular afferents of a vocal fish, the plainfin midshipman (Porichthys notatus).

摘要: While particle motion is thought to directly stimulate the inner ear of most fish species, it difficult measure and might not be predictable from pressure measurements in a small tank. It therefore important replicate experiments conducted relative using stimuli known motion, ensure that unmeasured components stimulus field do produce misleading frequency response profiles. The sensitivity plainfin midshipman fish, Porichthys notatus, isopressure has been described. This study now examines directional properties saccular afferents whole-body displacements simulating acoustic motion. Best frequencies were distributed bimodally, with peaks at 50 Hz 100 Hz. Most units had cosinusoidally shaped profiles horizontal vertical planes, though some showed slight deviations this pattern. A few (probably efferents) omnidirectional did phase lock waveform. These results are consistent responses nerve stimuli, strengthen hypothesis matches content behaviorally relevant vocalizations.