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Single Auditory Units in the Superior Olivary Complex: II: Locations of Unit Categories and Tonotopic Organization
TLDR
With few exceptions, units dorsolateral to the MSO were excited by ipsilateral sounds, and units ventromedial to theMSO, or in the ventral nucleus of the lateral lemniscus (VNLL), were exciting by contralateral sounds.
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Single auditory units in the superior olivary complex
TLDR
Response properties to sounds were examined in single auditory units in the superior olivary complex and the ventral nucleus of the lateral lemniscus to identify spontaneous firing rate, thresholds to best-frequency tones, and latency of responses to sound bursts.
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Single unit activity in the posteroventral cochlear nucleus of the cat
TLDR
Single unit activity in the posteroventral cochlear nucleus (PVCN) was recorded for a variety of stimulus conditions and certain types of units that responded best to the onsets of stimuli were located predominantly in the octopus cell region of the PVCN.
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Single unit activity in the dorsal cochlear nucleus of the cat
TLDR
Electrophysiological units were classified into types on the basis of their activity under a variety of stimulus conditions in three component layers of the dorsal cochlear nucleus: the molecular layer, the fusiform cell layer, and the polymorphic layer.
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Differential olivocochlear projections from lateral versus medial zones of the superior olivary complex
TLDR
Quantitative analysis of cochlear autoradiographs from these cats demonstrates that there are two OC systems, which appear to be cholinergic and lateral OC, and the many differences between these two systems suggest that they are functionally separate systems.
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The auditory midbrain of people with tinnitus: Abnormal sound-evoked activity revisited
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Tonotopic organization of the anteroventral cochlear nucleus of the cat
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Topographic organization of the olivocochlear projections from the lateral and medial zones of the superior olivary complex
TLDR
Topographic organizations in the projections of both medial and lateral olivocochlear systems in the cat are found and the possibility that the contralateral lateral‐zone projections may have the same cochleotopic organization but with a heavy bias toward the apex is suggested.
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Acoustic reflex frequency selectivity in single stapedius motoneurons of the cat.
TLDR
The thresholds and shapes of stapedius motoneuron TCs support the hypothesis that theStapedius acoustic reflex is triggered by summed activity of low-spontaneous-rate auditory nerve fibers with both low and high characteristic frequencies (CFs), and the gradation in high-frequency versus low-frequency sensitivity across motoneurons suggests there are not distinct subgroups of stapesius mot oneurons, based on their TCs.
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A block model of the cat cochlear nucleus
TLDR
A three‐dimensional block model of the cochlear nucleus of the cat was constructed from histologic sections, illustrated by localizing characteristic waveforms of gross evoked responses and characteristic frequencies of single units.
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