scholarly journals Responses from Single Units in the Dorsal Cochlear Nucleus to Electrical Stimulation of the Cochlea

2015 ◽  
pp. 4-8
Author(s):  
S. J. O�Leary ◽  
Y. C. Tong ◽  
G. M. Clark
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Nucleus ◽  
Dorsal Cochlear Nucleus ◽  
Single Units ◽  
Stimulation Of

Tinnitus suppression by electrical stimulation of the rat dorsal cochlear nucleus

2012 ◽  
Vol 522 (1) ◽  
pp. 16-20 ◽  
Author(s):  
Hao Luo ◽  
Xueguo Zhang ◽  
Javan Nation ◽  
Edward Pace ◽  
Laura Lepczyk ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Nucleus ◽  
Dorsal Cochlear Nucleus ◽  
Stimulation Of

scholarly journals Stimulus-dependent changes in optical responses of the dorsal cochlear nucleus using voltage-sensitive dye

2011 ◽  
Vol 106 (1) ◽  
pp. 421-436 ◽  
Author(s):  
F. G. Licari ◽  
M. Shkoukani ◽  
J. A. Kaltenbach
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Nucleus ◽  
Stimulus Frequency ◽  
Sound Level ◽  
Dorsal Cochlear Nucleus ◽  
Lateral Direction ◽  
Response Latencies ◽  
Voltage Sensitive Dye ◽  
Optical Responses ◽  
Stimulation Of

Optical imaging with voltage-sensitive dye was used to examine the spatiotemporal dynamics of stimulus-driven activity on the surface of the dorsal cochlear nucleus (DCN). Stimulation with tones at low to moderate levels produced localized regions of activation that were most commonly elongated rostrocaudally. The size of these activation areas expanded with increases in sound level, while their centers shifted from the lateral direction to the medial direction with increases in stimulus frequency. In contrast to the tonotopic patterns of activation evoked by tones, electrical stimulation of the DCN surface resulted in bands of activation that were elongated along the medial-lateral axis; response latencies increased with distance along these bands from the point of stimulation. Shifting the site of electrical stimulation from the rostral direction to the caudal direction induced corresponding shifts in the rostrocaudal location of the activation band; moving the electrode tip to subsurface depths resulted in loss of the elongated band. Transecting the DCN along the rostrocaudal axis midway between its medial and lateral extremities blocked propagation of the response to the half of the DCN distal to but not proximal to the stimulating electrode. The results suggest that the two modes of stimulation activated two distinct populations of neurons, one involving primarily tonotopically organized cells and the other crossing these tonotopic zones and likely representing the activation of parallel fibers. These results reveal a number of new features in the spatial patterns of tone-elicited activation that are not readily predicted by responses recorded electrophysiologically.

Responses of single units in cerebellar vermis of the cat to monaural and binaural stimuli

1975 ◽  
Vol 38 (2) ◽  
pp. 418-429 ◽  
Author(s):  
L. M. Aitkin ◽  
J. Boyd
Keyword(s):  
Inferior Colliculus ◽  
Cochlear Nucleus ◽  
Single Units ◽  
Intensity Difference ◽  
Cerebellar Neurons ◽  
Monaural Stimulation ◽  
Sustained Responses ◽  
Maximal Discharge ◽  
Onset Responses ◽  
Stimulation Of

The responses of 146 cerebellar neurons to tone stimuli were studied in 29 cats anesthetized with chloralose-urethan and in 7 decerebrate preparations. Units were classified as onset or sustained firing. Onset spikes occurred on stimulation of either ear and showed binaural facilitation, while sustained discharges were frequently only excited by monaural stimulation. The latent periods of sustained discharges appeared to be shorter than those of onset responses, and sustained discharges were also more sharply tuned than the onset units. Evidence was presented suggesting that onset responses reflected input from the inferior colliculus and sustained responses, the cochlear nucleus. The sterotyped facilitatory behavior of onset units suggested that a maximal discharge might occur if sounds were of equal intensity at each ear; 26 neurons were examined with variable interaural time or intensity differences and 10 of these exhibited maximal firing when the interaural time and intensity difference was zero--i.e., if the sound was located directly in front of the head.

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