Responses of Medullary Lateral Line Units of the Goldfish, Carassius auratus, to Amplitude-Modulated Sinusoidal Wave Stimuli
Table 1
Comparison of the properties of the responses of lateral line nerve fibres [15], brainstem units (present study) and midbrain units [10] to constant-amplitude and amplitude-modulated sine wave stimuli.
Lateral Line Nerve
Brainstem Medial Octavolateralis Nucleus
Midbrain Torus semicircularis
Reponse to CF
Tonic
Phasic or tonic
Phasic
Strong phase locking
Weak phase-locking to 33 Hz and 200 Hz Strong phase-locking to 50 Hz and 100 Hz
Weak phase-locking
Response to AM frequency
Strong phase-locking
Weak phase-locking for CFs = 33 Hz
Strong phase-locking
Strong phase-locking for CFs ≥ 50 Hz
Effect of Modulation depth
Response reduced by only up to 24% even if MD = 100%
Response different from response to CF if MD ≥ 24%
Response different from response to CF if MD ≥ 36%