Contralateral White Noise-Induced Enhancement in the Guinea PigÕs MLR: A Possible Link to Direc- tional Hearing

Cüneyt GÖKSOY

Makale detayları

Contralateral White Noise-Induced Enhancement in the Guinea PigÕs MLR: A Possible Link to Direc- tional Hearing

Yazarlar:

Cüneyt GÖKSOY

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Medical Sciences 2000 Vol.30 Issue 5, pp.433-440

Belge Tipi:

Makale

Yayın Tarihi:

4/2000

Belge Dili:

Türkçe

Document ID (Org No.):

2000757521

Sıklık:

İki Aylık

eISSN:

1303-6165

pISSN:

1300-0144

Anahtar kelimeler:

Özet:

 

The evoked potential components  in a time window of 10-50 ms following an  acoustic stimulus are called middle latency  responses (MLRs). It is known that an  amplitude enlargement occurs in guinea pig  MLRs to monaural clicks when continuous  white noise is applied to the other ear. This  study was undertaken to see whether this  enlargement is due simply to an overall,  generalised effect of contralateral white noise  (WN), or whether it may have some  connection to directional hearing. Recordings  were made from chronic guinea pig  preparations with epidural electrodes in the  temporal regions. Parallel to the results in the  literature, an enlargement of the MLR to  monaural clicks was seen when WN was at the  opposite ear relative to the condition with no  WN. A decrease was the result when WN was  applied to the same ear as the click. With WN  delivered to both ears an increase was  observed again. We suggest that these  findings, which are not likely to result from a  generalised effect of WN over the auditory  system, could be explained by a contribution  to the MLR from binaural mechanisms which  are probably stimulated by the momentary  shift of the intra-cranial sound image from  the side of the ear receiving the WN to side of  the ear receiving the click.

 

The evoked potential components  in a time window of 10-50 ms following an  acoustic stimulus are called middle latency  responses (MLRs). It is known that an  amplitude enlargement occurs in guinea pig  MLRs to monaural clicks when continuous  white noise is applied to the other ear. This  study was undertaken to see whether this  enlargement is due simply to an overall,  generalised effect of contralateral white noise  (WN), or whether it may have some  connection to directional hearing. Recordings  were made from chronic guinea pig  preparations with epidural electrodes in the  temporal regions. Parallel to the results in the  literature, an enlargement of the MLR to  monaural clicks was seen when WN was at the  opposite ear relative to the condition with no  WN. A decrease was the result when WN was  applied to the same ear as the click. With WN  delivered to both ears an increase was  observed again. We suggest that these  findings, which are not likely to result from a  generalised effect of WN over the auditory  system, could be explained by a contribution  to the MLR from binaural mechanisms which  are probably stimulated by the momentary  shift of the intra-cranial sound image from  the side of the ear receiving the WN to side of  the ear receiving the click.

Makale detayları

Contralateral White Noise-Induced Enhancement in the Guinea PigÕs MLR: A Possible Link to Direc- tional Hearing

Yazarlar:

Cüneyt GÖKSOY

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Medical Sciences 2000 Vol.30 Issue 5, pp.433-440

Belge Tipi:

Makale

Yayın Tarihi:

4/2000

Belge Dili:

Türkçe

Document ID (Org No.):

2000757521

Sıklık:

İki Aylık

eISSN:

1303-6165

pISSN:

1300-0144

Guinea Pig

Middle Latency Response

MLR

Directional Hearing

Contralateral White Noise Enhancement

Sayı

Makale detayları

Contralateral White Noise-Induced Enhancement in the Guinea PigÕs MLR: A Possible Link to Direc- tional Hearing

Yazarlar: Cüneyt GÖKSOY

Yayıncı: TUBITAK

Dergi: Turkish Journal of Medical Sciences 2000 Vol.30 Issue 5, pp.433-440

Belge Tipi: Makale

Yayın Tarihi: 4/2000

Belge Dili: Türkçe

Document ID (Org No.): 2000757521

Sıklık: İki Aylık

eISSN: 1303-6165

pISSN: 1300-0144

Guinea Pig

Middle Latency Response

MLR

Directional Hearing

Contralateral White Noise Enhancement

Sayı

Yazarlar:

Cüneyt GÖKSOY

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Medical Sciences 2000 Vol.30 Issue 5, pp.433-440

Belge Tipi:

Makale

Yayın Tarihi:

4/2000

Belge Dili:

Türkçe

Document ID (Org No.):

2000757521

Sıklık:

İki Aylık

eISSN:

1303-6165

pISSN:

1300-0144