Biomaterial Database

[Response of cochlear nucleus neurons of the cat to complex tone]. 1990

M Mori, and T Tanahashi

Department of Otorhinolaryngology, Nagoya University School of Medicine.

The response of the cochlear nucleus neurons in the anesthetized cat to complex tones has been studied for understanding the processing of tonal informations in that nucleus. Forty-eight cats were used in this study and data was obtained from 148 neurons with microelectrode technique. Two kinds of stimulus tones were applied and each of them consisted of pure tones (f1, f2, f3) and three complex tones (f1 + f2, f1 + f3, f2 + f3). The first group was composed of three pure tones of 670, 1250, 2400Hz and the second group was composed of those of 350, 500, 1100Hz, respectively. In 50 out of 148 cochlear nucleus neurons, we obtained some responses to complex tones. Response patterns to complex tones in 34 out of 50 cochlear nucleus neurons were similar to response patterns which had been obtained from auditory nerve. In 16 out of 50 neurons, however, the PST histogram pattern which had been obtained by complex tone stimuli did not show the same pattern as that of pure tone stimuli. For example, in same neuron, sustained type and pauser type responses had obtained by pure tones stimulus, but chopper type response had obtain by complex tone stimuli. And some neural activities were facilitated by the complex tones. From these results it can be speculated that the certain functions of the processing of the complex tones will be exist in the cochlear nucleus.

UI	MeSH Term	Description	Entries
D009474	Neurons	The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM.	Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
D002415	Cats	The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)	Felis catus,Felis domesticus,Domestic Cats,Felis domestica,Felis sylvestris catus,Cat,Cat, Domestic,Cats, Domestic,Domestic Cat
D003056	Cochlear Nerve	The cochlear part of the 8th cranial nerve (VESTIBULOCOCHLEAR NERVE). The cochlear nerve fibers originate from neurons of the SPIRAL GANGLION and project peripherally to cochlear hair cells and centrally to the cochlear nuclei (COCHLEAR NUCLEUS) of the BRAIN STEM. They mediate the sense of hearing.	Acoustic Nerve,Auditory Nerve,Acoustic Nerves,Auditory Nerves,Cochlear Nerves,Nerve, Acoustic,Nerve, Auditory,Nerve, Cochlear,Nerves, Acoustic,Nerves, Auditory,Nerves, Cochlear
D005072	Evoked Potentials, Auditory	The electric response evoked in the CEREBRAL CORTEX by ACOUSTIC STIMULATION or stimulation of the AUDITORY PATHWAYS.	Auditory Evoked Potentials,Auditory Evoked Response,Auditory Evoked Potential,Auditory Evoked Responses,Evoked Potential, Auditory,Evoked Response, Auditory,Evoked Responses, Auditory,Potentials, Auditory Evoked
D000161	Acoustic Stimulation	Use of sound to elicit a response in the nervous system.	Auditory Stimulation,Stimulation, Acoustic,Stimulation, Auditory
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia