Neurons in the inferior colliculus of the big brown bat show maximal amplitude sensitivity at the best duration

Chung-Hsin Wu, Philip H.S. Jen

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The big brown bats, Eptesicus fuscus, emit ultrasonic signals and analyze the returning echoes in multi-parametric domains to extract target features. The variation of different pulse parameters during hunting predicts that analysis of an echo parameter by bats is inevitably affected by other co-varying echo parameters. In this study, we presented data to show that the bat inferior collicular (IC) neurons have maximal amplitude sensitivity at the best duration (BD). A family of rate-amplitude function (RAF) of each IC neuron is plotted with the BD and non-BD sound pulses. The RAF plotted with BD pulses has sharper slope (SL) and smaller dynamic range (DR) than the RAF plotted with non-BD pulses has. All RAFs can be described as monotonic, saturated or non-monotonic. IC neurons with monotonic RAF are mostly recorded at deeper IC and they have the largest average BD, best amplitude (BA) and DR. Conversely, IC neurons with non-monotonic RAF are mostly recorded at upper IC and they have the smallest average BD, BA and DR. Low best frequency (BF) neurons at upper IC have shorter BD, smaller BA and DR than high BF neurons at deeper IC have. These data suggest that IC neurons that tune to an echo duration also have the greatest sensitivity to echo amplitude. These data also suggest that sensitivity in frequency, duration and amplitude appears to be orderly represented along the dorso-ventral axis of the IC.

Original languageEnglish
Pages (from-to)258-268
Number of pages11
JournalChinese Journal of Physiology
Volume50
Issue number5
Publication statusPublished - 2007 Jan 1

Fingerprint

Inferior Colliculi
Neurons
Ultrasonics

Keywords

  • Amplitude and duration sensitivity
  • Bat
  • Echolocation
  • Inferior colliculus
  • Rate-amplitude function

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

Cite this

Neurons in the inferior colliculus of the big brown bat show maximal amplitude sensitivity at the best duration. / Wu, Chung-Hsin; Jen, Philip H.S.

In: Chinese Journal of Physiology, Vol. 50, No. 5, 01.01.2007, p. 258-268.

Research output: Contribution to journalArticle

@article{9f3647e261e7421382257f976269f378,
title = "Neurons in the inferior colliculus of the big brown bat show maximal amplitude sensitivity at the best duration",
abstract = "The big brown bats, Eptesicus fuscus, emit ultrasonic signals and analyze the returning echoes in multi-parametric domains to extract target features. The variation of different pulse parameters during hunting predicts that analysis of an echo parameter by bats is inevitably affected by other co-varying echo parameters. In this study, we presented data to show that the bat inferior collicular (IC) neurons have maximal amplitude sensitivity at the best duration (BD). A family of rate-amplitude function (RAF) of each IC neuron is plotted with the BD and non-BD sound pulses. The RAF plotted with BD pulses has sharper slope (SL) and smaller dynamic range (DR) than the RAF plotted with non-BD pulses has. All RAFs can be described as monotonic, saturated or non-monotonic. IC neurons with monotonic RAF are mostly recorded at deeper IC and they have the largest average BD, best amplitude (BA) and DR. Conversely, IC neurons with non-monotonic RAF are mostly recorded at upper IC and they have the smallest average BD, BA and DR. Low best frequency (BF) neurons at upper IC have shorter BD, smaller BA and DR than high BF neurons at deeper IC have. These data suggest that IC neurons that tune to an echo duration also have the greatest sensitivity to echo amplitude. These data also suggest that sensitivity in frequency, duration and amplitude appears to be orderly represented along the dorso-ventral axis of the IC.",
keywords = "Amplitude and duration sensitivity, Bat, Echolocation, Inferior colliculus, Rate-amplitude function",
author = "Chung-Hsin Wu and Jen, {Philip H.S.}",
year = "2007",
month = "1",
day = "1",
language = "English",
volume = "50",
pages = "258--268",
journal = "Chinese Journal of Physiology",
issn = "0304-4920",
publisher = "Chinese Physiological Society",
number = "5",

}

TY - JOUR

T1 - Neurons in the inferior colliculus of the big brown bat show maximal amplitude sensitivity at the best duration

AU - Wu, Chung-Hsin

AU - Jen, Philip H.S.

PY - 2007/1/1

Y1 - 2007/1/1

N2 - The big brown bats, Eptesicus fuscus, emit ultrasonic signals and analyze the returning echoes in multi-parametric domains to extract target features. The variation of different pulse parameters during hunting predicts that analysis of an echo parameter by bats is inevitably affected by other co-varying echo parameters. In this study, we presented data to show that the bat inferior collicular (IC) neurons have maximal amplitude sensitivity at the best duration (BD). A family of rate-amplitude function (RAF) of each IC neuron is plotted with the BD and non-BD sound pulses. The RAF plotted with BD pulses has sharper slope (SL) and smaller dynamic range (DR) than the RAF plotted with non-BD pulses has. All RAFs can be described as monotonic, saturated or non-monotonic. IC neurons with monotonic RAF are mostly recorded at deeper IC and they have the largest average BD, best amplitude (BA) and DR. Conversely, IC neurons with non-monotonic RAF are mostly recorded at upper IC and they have the smallest average BD, BA and DR. Low best frequency (BF) neurons at upper IC have shorter BD, smaller BA and DR than high BF neurons at deeper IC have. These data suggest that IC neurons that tune to an echo duration also have the greatest sensitivity to echo amplitude. These data also suggest that sensitivity in frequency, duration and amplitude appears to be orderly represented along the dorso-ventral axis of the IC.

AB - The big brown bats, Eptesicus fuscus, emit ultrasonic signals and analyze the returning echoes in multi-parametric domains to extract target features. The variation of different pulse parameters during hunting predicts that analysis of an echo parameter by bats is inevitably affected by other co-varying echo parameters. In this study, we presented data to show that the bat inferior collicular (IC) neurons have maximal amplitude sensitivity at the best duration (BD). A family of rate-amplitude function (RAF) of each IC neuron is plotted with the BD and non-BD sound pulses. The RAF plotted with BD pulses has sharper slope (SL) and smaller dynamic range (DR) than the RAF plotted with non-BD pulses has. All RAFs can be described as monotonic, saturated or non-monotonic. IC neurons with monotonic RAF are mostly recorded at deeper IC and they have the largest average BD, best amplitude (BA) and DR. Conversely, IC neurons with non-monotonic RAF are mostly recorded at upper IC and they have the smallest average BD, BA and DR. Low best frequency (BF) neurons at upper IC have shorter BD, smaller BA and DR than high BF neurons at deeper IC have. These data suggest that IC neurons that tune to an echo duration also have the greatest sensitivity to echo amplitude. These data also suggest that sensitivity in frequency, duration and amplitude appears to be orderly represented along the dorso-ventral axis of the IC.

KW - Amplitude and duration sensitivity

KW - Bat

KW - Echolocation

KW - Inferior colliculus

KW - Rate-amplitude function

UR - http://www.scopus.com/inward/record.url?scp=46649091981&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=46649091981&partnerID=8YFLogxK

M3 - Article

C2 - 18274162

AN - SCOPUS:46649091981

VL - 50

SP - 258

EP - 268

JO - Chinese Journal of Physiology

JF - Chinese Journal of Physiology

SN - 0304-4920

IS - 5

ER -