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%
		Lowpass	Lowpass
Frequency selectivity	Bandpass	Bandpass	Bandpass
		Highpass	Highpass