Evidence for perception of fine echo delay and phase by the FM bat, Eptesicus fuscus

1993 ◽  
Vol 172 (5) ◽  
pp. 533-547 ◽  
Author(s):  
J.A. Simmons
Keyword(s):  
Eptesicus Fuscus ◽  
Fm Bat ◽  
Echo Delay

Responses of inferior collicular neurons of the FM bat, Eptesicus fuscus, to pulse trains with varied pulse amplitudes

1994 ◽  
Vol 79 (1-2) ◽  
pp. 105-114 ◽  
Author(s):  
Toshio Moriyama ◽  
Tientzu Hou ◽  
Min Wu ◽  
Philip H.-S. Jen
Keyword(s):  
Eptesicus Fuscus ◽  
Pulse Trains ◽  
Fm Bat ◽  
Inferior Collicular

scholarly journals Echo-delay resolution in sonar images of the big brown bat, Eptesicus fuscus

1998 ◽  
Vol 95 (21) ◽  
pp. 12647-12652 ◽  
Author(s):  
J. A. Simmons ◽  
M. J. Ferragamo ◽  
C. F. Moss
Keyword(s):  
Eptesicus Fuscus ◽  
Big Brown Bat ◽  
Sonar Images ◽  
Echo Delay

scholarly journals Natural echolocation sequences evoke echo-delay selectivity in the auditory midbrain of the FM bat, Eptesicus fuscus

2018 ◽  
Vol 120 (3) ◽  
pp. 1323-1339 ◽  
Author(s):  
Silvio Macías ◽  
Jinhong Luo ◽  
Cynthia F. Moss
Keyword(s):  
Inferior Colliculus ◽  
Sweep Rate ◽  
Eptesicus Fuscus ◽  
Target Range ◽  
Temporal Patterning ◽  
Stimulus Context ◽  
Constant Frequency ◽  
New Findings ◽  
Echo Delay ◽  
Delay Tuning

Echolocating bats must process temporal streams of sonar sounds to represent objects along the range axis. Neuronal echo-delay tuning, the putative mechanism of sonar ranging, has been characterized in the inferior colliculus (IC) of the mustached bat, an insectivorous species that produces echolocation calls consisting of constant frequency and frequency modulated (FM) components, but not in species that use FM signals alone. This raises questions about the mechanisms that give rise to echo-delay tuning in insectivorous bats that use different signal designs. To investigate whether stimulus context may account for species differences in echo-delay selectivity, we characterized single-unit responses in the IC of awake passively listening FM bats, Eptesicus fuscus, to broadcasts of natural sonar call-echo sequences, which contained dynamic changes in signal duration, interval, spectrotemporal structure, and echo-delay. In E. fuscus, neural selectivity to call-echo delay emerges in a population of IC neurons when stimulated with call-echo pairs presented at intervals mimicking those in a natural sonar sequence. To determine whether echo-delay selectivity also depends on the spectrotemporal features of individual sounds within natural sonar sequences, we studied responses to computer-generated echolocation signals that controlled for call interval, duration, bandwidth, sweep rate, and echo-delay. A subpopulation of IC neurons responded selectively to the combination of the spectrotemporal structure of natural call-echo pairs and their temporal patterning within a dynamic sonar sequence. These new findings suggest that the FM bat’s fine control over biosonar signal parameters may modulate IC neuronal selectivity to the dimension of echo-delay. NEW & NOTEWORTHY Echolocating bats perform precise auditory temporal computations to estimate their distance to objects. Here, we report that response selectivity of neurons in the inferior colliculus of a frequency modulated bat to call-echo delay, or target range tuning, depends on the temporal patterning and spectrotemporal features of sound elements in a natural echolocation sequence. We suggest that echo responses to objects at different distances are gated by the bat’s active control over the spectrotemporal patterning of its sonar emissions.

Auditory response properties and spatial response areas of superior collicular neurons of the FM bat,Eptesicus fuscus

1984 ◽  
Vol 154 (3) ◽  
pp. 407-413 ◽  
Author(s):  
Philip Hungsun Jen ◽  
Xinde Sun ◽  
Tsutomu Kamada ◽  
Shangqing Zhang ◽  
Tateo Shimozawa
Keyword(s):  
Eptesicus Fuscus ◽  
Response Properties ◽  
Spatial Response ◽  
Auditory Response ◽  
Fm Bat

Neurophysiological observations on the auditory cortex in the FM bat, Eptesicus fuscus

1989 ◽  
Vol 86 (S1) ◽  
pp. S97-S97
Author(s):  
Cynthia F. Moss ◽  
Jonathan Fritz ◽  
Michael Ferragamo ◽  
James A. Simmons
Keyword(s):  
Auditory Cortex ◽  
Eptesicus Fuscus ◽  
Fm Bat

Auditory space representation in the inferior colliculus of the FM bat, Eptesicus fuscus

1987 ◽  
Vol 419 (1-2) ◽  
pp. 7-18 ◽  
Author(s):  
Philip H.-S. Jen ◽  
Xinde Sun ◽  
Demao Chen ◽  
Haibing Teng
Keyword(s):  
Inferior Colliculus ◽  
Eptesicus Fuscus ◽  
Space Representation ◽  
Auditory Space ◽  
Fm Bat
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