Thoracic auditory interneuron with binaural summation by inhibition in a noctuid moth

1986 ◽  
Vol 73 (1) ◽  
pp. 40-41 ◽  
Author(s):  
N. Alonso ◽  
F. Coro
Keyword(s):  
Noctuid Moth ◽  
Binaural Summation ◽  
Auditory Interneuron

The brain structure and neurosecretory cells of noctuid moth Anadevidia peponis: Noctuidae

1990 ◽  
Vol 48 (3) ◽  
pp. 436-437
Author(s):  
M. Sato ◽  
Y. Ogawa ◽  
M. Sasaki ◽  
T. Matsuo
Keyword(s):  
Biological Clock ◽  
Virgin Female ◽  
Basic Structure ◽  
Fixed Time ◽  
Neurosecretory Cells ◽  
Nerve Cells ◽  
Noctuid Moth ◽  
The Right ◽  
20 Nm ◽  
The Brain

A virgin female of the noctuid moth, a kind of noctuidae that eats cucumis, etc. performs calling at a fixed time of each day, depending on the length of a day. The photoreceptors that induce this calling are located around the neurosecretory cells (NSC) in the central portion of the protocerebrum. Besides, it is considered that the female’s biological clock is located also in the cerebral lobe. In order to elucidate the calling and the function of the biological clock, it is necessary to clarify the basic structure of the brain. The observation results of 12 or 30 day-old noctuid moths showed that their brains are basically composed of an outer and an inner portion-neural lamella (about 2.5 μm) of collagen fibril and perineurium cells. Furthermore, nerve cells surround the cerebral lobes, in which NSCs, mushroom bodies, and central nerve cells, etc. are observed. The NSCs are large-sized (20 to 30 μm dia.) cells, which are located in the pons intercerebralis of the head section and at the rear of the mushroom body (two each on the right and left). Furthermore, the cells were classified into two types: one having many free ribosoms 15 to 20 nm in dia. and the other having granules 150 to 350 nm in dia. (Fig. 1).

The early development of antenna and antennal sensilla in the noctuid moth, Agrotis segetum (Insecta: Lepidoptera)

1990 ◽  
Vol 48 (3) ◽  
pp. 502-503
Author(s):  
Eric Hallberg ◽  
Lina Hansén
Keyword(s):  
Cell Death ◽  
Stem Cell ◽  
Early Development ◽  
Larval Stage ◽  
Pupal Stage ◽  
Agrotis Segetum ◽  
Antennal Sensilla ◽  
Noctuid Moth ◽  
Standard Procedures

The antennal rudiments in lepidopterous insects are present as disks during the larval stage. The tubular double-walled antennal disk is present beneath the larval antenna, and its inner layer gives rise to the adult antenna during the pupal stage. The sensilla develop from a cluster of cells that are derived from one stem cell, which gives rise to both sensory and enveloping cells. During the morphogenesis of the sensillum these cells undergo major transformations, including cell death. In the moth Agrotis segetum the pupal stage lasts about 14 days (temperature, 25°C). The antennae, clearly seen from the exterior, were dissected and fixed according to standard procedures (3 % glutaraldehyde in 0.15 M cacaodylate buffer, followed by 1 % osmiumtetroxide in the same buffer). Pupae from day 1 to day 8, of both sexes were studied.

scholarly journals Revisiting the Labial Pit Organ Pathway in the Noctuid Moth, Helicoverpa armigera

2020 ◽  
Vol 11 ◽  
Author(s):  
Pramod KC ◽  
Xi Chu ◽  
Pål Kvello ◽  
Xin-Cheng Zhao ◽  
Gui-Rong Wang ◽  
...  
Keyword(s):  
Helicoverpa Armigera ◽  
Noctuid Moth ◽  
Pit Organ ◽  
Helicoverpa Armígera

scholarly journals Binaural summation of amplitude modulation involves weak interaural suppression

2018 ◽  
Author(s):  
D.H. Baker ◽  
G. Vilidaite ◽  
E. McClarnon ◽  
E. Valkova ◽  
A. Bruno ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Modulation Depth ◽  
Visual Signal ◽  
Data Sets ◽  
Single Object ◽  
Ecological Constraints ◽  
Binaural Summation ◽  
Eeg Data ◽  
Signal Combination ◽  
The Brain

AbstractThe brain combines sounds from the two ears, but what is the algorithm used to achieve this summation of signals? Here we combine psychophysical amplitude modulation discrimination and steady-state electroencephalography (EEG) data to investigate the architecture of binaural combination for amplitude-modulated tones. Discrimination thresholds followed a ‘dipper’ shaped function of pedestal modulation depth, and were consistently lower for binaural than monaural presentation of modulated tones. The EEG responses were greater for binaural than monaural presentation of modulated tones, and when a masker was presented to one ear, it produced only weak suppression of the response to a signal presented to the other ear. Both data sets were well-fit by a computational model originally derived for visual signal combination, but with suppression between the two channels (ears) being much weaker than in binocular vision. We suggest that the distinct ecological constraints on vision and hearing can explain this difference, if it is assumed that the brain avoids over-representing sensory signals originating from a single object. These findings position our understanding of binaural summation in a broader context of work on sensory signal combination in the brain, and delineate the similarities and differences between vision and hearing.

Efferent control in the ocellus of a noctuid moth

1991 ◽  
Vol 169 (6) ◽  
Author(s):  
Shin Yamazaki ◽  
Shigeki Yamashita
Keyword(s):  
Efferent Control ◽  
Noctuid Moth

scholarly journals Glutathione-S-Transferases in the Olfactory Organ of the Noctuid Moth Spodoptera littoralis, Diversity and Conservation of Chemosensory Clades

2018 ◽  
Vol 9 ◽  
Author(s):  
Nicolas Durand ◽  
Marie-Anne Pottier ◽  
David Siaussat ◽  
Françoise Bozzolan ◽  
Martine Maïbèche ◽  
...  
Keyword(s):  
Spodoptera Littoralis ◽  
Olfactory Organ ◽  
Noctuid Moth ◽  
Glutathione S Transferases

Mechanism of Southward Migration of a Noctuid Moth [Agrotis Ipsilon (Hufnagel)]: A Complete Migrant

Ecology ◽  
1993 ◽  
Vol 74 (8) ◽  
pp. 2303-2314 ◽  
Author(s):  
William B. Showers ◽  
Armon J. Keaster ◽  
Jimmy R. Raulston ◽  
William H. Hendrix ◽  
M. Ellison Derrick ◽  
...  
Keyword(s):  
Agrotis Ipsilon ◽  
Noctuid Moth ◽  
Southward Migration
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