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Figure 5.

Figure 5.

Efferent stimulation causes a frequency specific loss of sensitivity in type I cochlear afferents. Frequency sweep stimulation was used to determine acoustic threshold in a single afferent of the cat cochlea. When paired with electrical stimulation of medial olivocochlear (MOC) efferent neuron efferents (gray curve) the cochlear afferent was “detuned.” SPL, Sound pressure level. (From Guinan and Gifford 1998a; adapted, with permission, from Elsevier © 1988.)