Teppei Ebina

Medial premotor cortex as a potential reservoir of reward expectancy signals influencing the primate frontoparietal network

Keisuke Sehara, Masashi Kondo, Yuka Hirayama, Teppei Ebina et autres

Reward expectancy plays an important role in modulating cortical activity associated with motivation, selection, and preparation of subsequent goal-directed movements. However, it is unclear how it is represented in the primate frontoparietal cortex in a form that is separable from activity for …

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Pan-cortical area sensorimotor network coordination during motor learning of forelimb-reaching task in the marmoset

Y. Yamane, Teppei Ebina, Masanori Matsuzaki, Kenji Doya

ABSTRACT Motor learning alters activities in multiple brain areas. While learning-induced activity change in these areas has been investigated, how the information flow changes in the network across those areas remains to be thoroughly examined. We analysed wide-field calcium imaging data spanning …

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ARViS: a bleed-free multi-site automated injection robot for accurate, fast, and dense delivery of virus to mouse and marmoset cerebral cortex

Shinnosuke Nomura, Shin-Ichiro Terada, Teppei Ebina, Masato Uemura et autres

Genetically encoded fluorescent sensors continue to be developed and improved. If they could be expressed across multiple cortical areas in non-human primates, it would be possible to measure a variety of spatiotemporal dynamics of primate-specific cortical activity. Here, we develop an Automated …

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Movement-independent representation of reward-predicting cues in the medial part of the primate premotor cortex

Keisuke Sehara, Masashi Kondo, Yuka Hirayama, Teppei Ebina et autres

Abstract Neural activity across the dorsal neocortex of rodents is dominated by orofacial and limb movements, irrespective of whether the movements are task-relevant or task-irrelevant. To examine the extent to which movements and a primitive cognitive signal, i.e., reward expectancy, modulate the …

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Dynamics of directional motor tuning in the primate premotor and primary motor cortices during sensorimotor learning

Teppei Ebina, Akitaka Sasagawa, Dokyeong Hong, Rieko Setsuie et autres

Sensorimotor learning requires reorganization of neuronal activity in the premotor cortex (PM) and primary motor cortex (M1). To reveal PM- and M1-specific reorganization in a primate, we conducted calcium imaging in common marmosets while they learned a two-target reaching (pull/push) task after …

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ARViS: A bleed-free multi-site automated injection robot for accurate, fast, and dense delivery of virus to mouse and marmoset brains

Shinosuke Nomura, Shin-Ichiro Terada, Teppei Ebina, Masato Uemura et autres

Summary Genetically encoded fluorescent sensors continue to be developed and improved. If they could be expressed across multiple cortical areas in non-human primates, it would be possible to measure a variety of spatiotemporal dynamics of primate-specific cortical activity. Here, we develop an …

jp (code pays fourni par la source)

Change detection in the primate auditory cortex through feedback of prediction error signals

Keitaro Obara, Teppei Ebina, Shin-Ichiro Terada, Takanori Uka et autres

Although cortical feedback signals are essential for modulating feedforward processing, no feedback error signal across hierarchical cortical areas has been reported. Here, we observed such a signal in the auditory cortex of awake common marmoset during an oddball paradigm to induce auditory …

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Dynamics of motor direction representation in the primate premotor and primary motor cortices during sensorimotor learning

Teppei Ebina, Akitaka Sasagawa, Dokyeong Hong, Rieko Setsuie et autres

Summary Sensorimotor learning requires reorganization of neuronal activity in the premotor cortex (PM) and primary motor cortex (M1). However, how PM- and M1-specific reorganization occurs in primates remains unclear. We conducted calcium imaging of these areas in common marmosets while they learned …

jp (code pays fourni par la source)

Optical deep-cortex exploration in behaving rhesus macaques

M Matsuzaki, Teppei Ebina

Two papers published in June 2021 used a two-photon microscope or one-photon miniature microscope to interrogate the motor cortex in behaving macaque monkeys. The imaging was performed over several months, and the direction of natural arm reaching was decoded from the population …

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Tb 3+ -doped fluorescent glass for biology

Kazuki Okamoto, Teppei Ebina, Naoki Fujii, Kuniaki Konishi et autres

Tb 3+ -doped glass emits GFP-like fluorescence and is versatile for various biological research purposes.

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Structural dynamics and stability of corticocortical and thalamocortical axon terminals during motor learning

Ryota Hasegawa, Teppei Ebina, Yasuhiro R. Tanaka, Kenta Kobayashi et autres

Synaptic plasticity is the cellular basis of learning and memory. When animals learn a novel motor skill, synaptic modifications are induced in the primary motor cortex (M1), and new postsynaptic dendritic spines relevant to motor memory are formed in the early stage …

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Common marmoset as a model primate for study of the motor control system

M Matsuzaki, Teppei Ebina

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