A5018631939- Visual perception and processing mechanisms
- Neural dynamics and brain function
- Fiscal Policy and Economic Growth
- Neuroscience and Neuropharmacology Research
- Advanced Control Systems Optimization
- Visual Attention and Saliency Detection
- Neural and Behavioral Psychology Studies
- Memory and Neural Mechanisms
- Vestibular and auditory disorders
- Advanced Control Systems Design
- Gender, Labor, and Family Dynamics
- Olfactory and Sensory Function Studies
- Neuroscience and Neural Engineering
- Climate Change Policy and Economics
- Tactile and Sensory Interactions
- Control Systems and Identification
- Economic theories and models
- Neurological disorders and treatments
- Retinal Development and Disorders
- Fault Detection and Control Systems
- EEG and Brain-Computer Interfaces
- Ocular and Laser Science Research
- Transcranial Magnetic Stimulation Studies
- Photoreceptor and optogenetics research
- Sleep and Wakefulness Research
Hokkaido University
1991-2024
University of Tsukuba
1981-2022
Konan University
2022
National Institute for Physiological Sciences
2011-2021
The Graduate University for Advanced Studies, SOKENDAI
2009-2021
Ryukoku University
2015-2018
Yokohama City University
2017
Institute of Natural Science
2017
National Institutes of Natural Sciences
2008-2015
Kiryu University
2014
1. Glass microelectrodes were inserted into the lateral vestibular nucleus of Deiters, and potential changes recorded both extracellularly intracellularly under stimulation spinal cord.2. When ipsilateral C3 segment was stimulated at its ventrolateral surface, negative field potentials several millivolts from area which histologically identified as Deiters' nucleus. These presumed to be caused by antidromic activation neurones through vestibulospinal tract.3. The showed different...
Bidirectional signaling between neocortex and limbic cortex has been hypothesized to contribute the retrieval of long-term memory. We tested this hypothesis by comparing time courses perceptual memory-retrieval signals in two neighboring areas temporal cortex, area TE (TE) perirhinal (PRh), while monkeys were performing a visual pair-association task. Perceptual signal reached before PRh, confirming its forward propagation. In contrast, appeared earlier neurons then gradually recruited...
The macaque inferotemporal (IT) cortex, which serves as the storehouse of visual long-term memory, consists two distinct but mutually interconnected areas: area TE (TE) and 36 (A36). In present study, we tested whether memory encoding is put forward at this stage, i.e., association between representations different semantically linked objects proceeds from to A36. To address question, trained monkeys in a pair-association (PA) task, after single-unit activities were recorded A36 during PA...
Microsaccades exhibit systematic oscillations in direction after spatial cueing, and these correlate with facilitatory inhibitory changes behavioral performance the same tasks. However, independent of visual sensitivity also arise pre-microsaccadically. Given such pre-microsaccadic modulation, an imperative question to ask becomes: how much task cueing may be attributable peri-movement sensitivity? To investigate this question, we adopted a theoretical approach. We developed minimalist model...
1. Antidromic activation from the thalamus and superior colliculus was used to identify axonal projections of neurons in substantia nigra. 2. Up 43% nigral studied individual animals had branching axons that could be activated antidromically both ipsilateral ventromedial colliculus. 3. For several neurons, conduction time spent unbranched segment calculated using measurable collision antidromic latency times. Time less than 20% for most studied. 4. Latencies were measured would appropriate...
Abstract Previous reports on ‘blindsight’ have shown that some patients with lesions of the primary visual cortex (V1) could localize targets in their scotoma hand and/or eye movements without awareness. A role retino‐tectal pathway residual vision has been proposed but direct evidence for this still remains sparse. To examine possibility, we inactivated superior colliculus (SC) unilateral V1‐lesioned monkeys using microinjections muscimol, and analysed effects visually guided saccades....
Microsaccades are systematically modulated by peripheral spatial cues, and these eye movements have been implicated in perceptual motor performance changes cueing tasks. However, an additional oculomotor factor that may also influence tasks, fixational position itself, has largely neglected so far. Using precise tracking real-time retinal-image stabilization, we carefully analyzed dynamics related them to microsaccade generation during cueing. As expected, baseline fixation, microsaccades...
Monkeys with unilateral lesions of the primary visual cortex (V1) can make saccades to stimuli in their contralateral (“affected”) hemifield, but sensitivity luminance contrast is reduced. We examined whether effects V1 were restricted vision or included later stages visual–oculomotor processing. tested a visually guided saccade task various spatial positions and contrasts. Saccades affected hemifield compared those near-threshold normal so that performances localization similar. Scatter end...
Macaque monkeys with a unilateral lesion in V1 have been used as an animal model of blindsight. While objective proof blindsight requires that the two aspects (residual forced-choice localization and attenuated yes-no detection) should be tested under identical stimulus conditions using bias-free measures sensitivity, these not attained studies nonhuman primates. Here we macaque saccade tasks stimuli: (FC) task (YN) task. An analysis based on signal detection theory revealed sensitivity FC...