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Toshiya Matsushima
Hokkaido University
AnatomyEndocrinologyNeuroscienceQuailBiology
132Publications
24H-index
2,175Citations
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Publications 134
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#1Naoya Aoki (Teikyo University)H-Index: 5
#2Toshiyuki Fujita (Teikyo University)H-Index: 1
Last. Koichi J. Homma (Teikyo University)H-Index: 24
view all 7 authors...
Abstract Filial imprinting in precocial birds is a useful model for studying memory formation in early learning. The intermediate medial mesopallium (IMM) in the dorsal telencephalon is one of the critical brain regions where the releases of several neurotransmitters increase after the start of imprinting training. Among the increased neurotransmitters, the role of acetylcholine in imprinting has remained unclear. Acetylcholine in the mammalian brain plays an important role in encoding new memor...
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#1Momoko Miura (Hokkaido University)H-Index: 3
#2Daisuke Nishi (Hokkaido University)H-Index: 1
Last. Toshiya Matsushima (Hokkaido University)H-Index: 24
view all 3 authors...
To study how predisposed preferences shape the formation of social attachment through imprinting, newly hatched domestic chicks (Gallus gallus domesticus) were simultaneously exposed to two animations composed of comparable light points in different colours (red and yellow), one for a walking motion and another for a linear motion. When a walking animation in red was combined with a linear one in yellow, chicks formed a learned preference for the former that represented biological motion (BM). W...
1 CitationsSource
#1Toshiyuki Fujita (Teikyo University)H-Index: 1
#2Naoya Aoki (Teikyo University)H-Index: 5
Last. Shinji Yamaguchi (Teikyo University)H-Index: 12
view all 6 authors...
The avian pallium is organised into clusters of neurons and does not have layered structures such as those seen in the mammalian neocortex. The evolutionary relationship between sub-regions of avian pallium and layers of mammalian neocortex remains unclear. One hypothesis, based on the similarities in neural connections of the motor output neurons that project to sub-pallial targets, proposed the cell-type homology between brainstem projection neurons in neocortex layers 5 or 6 (L5/6) and those ...
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#1Toshiya MatsushimaH-Index: 24
#2Hidetoshi AmitaH-Index: 7
Last. Yukiko OguraH-Index: 5
view all 3 authors...
Source
#1Naoya Aoki (Teikyo University)H-Index: 5
#2Shinji Yamaguchi (Teikyo University)H-Index: 12
Last. Koichi J. Homma (Teikyo University)H-Index: 24
view all 7 authors...
Filial imprinting of domestic chicks has a well-defined sensitive (critical) period lasting in the laboratory from hatching to day 3. It is a typical model to investigate the molecular mechanisms underlying memory formation in early learning. We recently found that thyroid hormone 3,5,3ʹ-triiodothyronine (T3) is a determinant of the sensitive period. Rapid increases in cerebral T3 levels are induced by imprinting training, rendering chicks imprintable. Furthermore, the administration of exogenou...
2 CitationsSource
#1Momoko Miura (Hokkaido University)H-Index: 3
#2Naoya Aoki (Teikyo University)H-Index: 5
Last. Toshiya Matsushima (Hokkaido University)H-Index: 24
view all 5 authors...
Filial imprinting is associated with induction of predisposed preference to animations that bear visual features of Johansson’s biological motion (BM), and the induction is limited to a few days after hatching. As thyroid hormone (3,5,3'-triiodothyronine, T3) plays a critical role in determining the sensitive period of imprinting, we examined if exogenously applied T3 (or iopanoic acid, IOP; a selective inhibitor for converting enzymes) could also sensitize (or desensitize) the BM induction. Chi...
1 CitationsSource
#1Yukiko Ogura (UTokyo: University of Tokyo)H-Index: 1
#2Hidetoshi Amita (NIH: National Institutes of Health)H-Index: 7
Last. Toshiya Matsushima (Hokkaido University)H-Index: 24
view all 3 authors...
Results of intertemporal choice paradigm have been accounted for mostly by psychological terms such as temporal discounting of subjective value. Inability to wait for delayed gratification (choice impulsiveness, as opposed to self-control) is often taken to represent violated rationality. If viewed from foraging ecology, however, such impulsiveness can be accountable as adaptive adjustments to requirements in nature. First, under the circumstance where foragers stochastically encounter food item...
1 CitationsSource
#1Yuri Takemura (Hokkaido University)H-Index: 1
#2Shinji Yamaguchi (Teikyo University)H-Index: 12
Last. Toshiya Matsushima (Hokkaido University)H-Index: 24
view all 6 authors...
Abstract Filial imprinting leads to the formation of social attachment if training is performed during a brief sensitive period after hatching. We found that thyroid hormone (3,5,3′-triiodothyronine, T3) acts as a critical determining factor of the sensitive period in domestic chicks. Imprinting upregulates gene expression of the converting enzyme (Dio2, type 2 iodothyronine deiodinase) in the telencephalon, leading to increased brain T3 content. If systemically applied, T3 facilitates imprintin...
3 CitationsSource
#1Shinji Yamaguchi (Teikyo University)H-Index: 12
#2Naoya Aoki (Teikyo University)H-Index: 5
Last. Koichi J. Homma (Teikyo University)H-Index: 24
view all 4 authors...
Abstract Filial imprinting is the behavior observed in chicks during the sensitive or critical period of the first 2–3 days after hatching; however, after this period they cannot be imprinted when raised in darkness. Our previous study showed that temporal augmentation of the endogenous thyroid hormone 3,5,3′-triiodothyronine (T3) in the telencephalon, by imprinting training, starts the sensitive period just after hatching. Intravenous injection of T3 enables imprinting of chicks on days 4 or 6 ...
2 CitationsSource
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