Differential roles of delay-period neural activity in the monkey
... and maintain it throughout the delay period of working-memory (WM) tasks. However, the mechanisms of this temporal integration in the DLPFC are still poorly understood. In the present study, to further elucidate the role of the DLPFC in crossmodal WM, we trained monkeys to perform visuo–haptic (VH) ...
... and maintain it throughout the delay period of working-memory (WM) tasks. However, the mechanisms of this temporal integration in the DLPFC are still poorly understood. In the present study, to further elucidate the role of the DLPFC in crossmodal WM, we trained monkeys to perform visuo–haptic (VH) ...
Comparison of Quantities: Core and Format
... standard template. During normalization, the functional volumes were resampled to a 3 3 3 3 3--mm3 resolution. Last, functional images were smoothed using an isotropic Gaussian kernel (full-width at halfmaximum = 8 mm). Functional data were subjected to a general linear model analysis as implemented ...
... standard template. During normalization, the functional volumes were resampled to a 3 3 3 3 3--mm3 resolution. Last, functional images were smoothed using an isotropic Gaussian kernel (full-width at halfmaximum = 8 mm). Functional data were subjected to a general linear model analysis as implemented ...
Words and pictures in the left fusiform gyrus
... 15 s prior to isotope arrival to the brain and continued during the first 30 s of acquisition corresponding to the delivery of radiotracer to the brain. From the point of task offset, the subjects viewed a blank screen for the next 60 s, yielding a total acquisition time of 90 s. During both colour ...
... 15 s prior to isotope arrival to the brain and continued during the first 30 s of acquisition corresponding to the delivery of radiotracer to the brain. From the point of task offset, the subjects viewed a blank screen for the next 60 s, yielding a total acquisition time of 90 s. During both colour ...
Neuronal mechanisms for the perception of ambiguous stimuli
... spatial luminance profile is formed by the multiplication of a sinusoidal waveform with a Gaussian envelope.) Orientation jitter breaks up any pattern, therefore favouring eye-rivalry rather than percept-rivalry. There is a gradual shift from eye-rivalry to percept-rivalry as pattern coherence is in ...
... spatial luminance profile is formed by the multiplication of a sinusoidal waveform with a Gaussian envelope.) Orientation jitter breaks up any pattern, therefore favouring eye-rivalry rather than percept-rivalry. There is a gradual shift from eye-rivalry to percept-rivalry as pattern coherence is in ...
Open interconnected model of basal ganglia
... symptoms as a result of damage to only one station in one of the circuits. Thus, whereas the closed segregated organization provides a framework whereby damage to different stations of an individual circuit results in selective disturbances of motor, cognitive, or emotional behaviors, the open inter ...
... symptoms as a result of damage to only one station in one of the circuits. Thus, whereas the closed segregated organization provides a framework whereby damage to different stations of an individual circuit results in selective disturbances of motor, cognitive, or emotional behaviors, the open inter ...
Frontal Eye Fields - Psychological Sciences
... FEF contributes to selecting the target and shifting attention before gaze shifts, both saccadic and pursuit [8]. It is also crucial to note that the neural signals occurring in FEF coincide with identical signals occurring in a network of interconnected structures including the superior colliculus ...
... FEF contributes to selecting the target and shifting attention before gaze shifts, both saccadic and pursuit [8]. It is also crucial to note that the neural signals occurring in FEF coincide with identical signals occurring in a network of interconnected structures including the superior colliculus ...
A103 - Viktor`s Notes for the Neurosurgery Resident
... 1) primary motor cortex - major input to STN; arises from layer V; primarily collaterals of axons terminating elsewhere (STN is pivotal nucleus through which cortex influences output of basal ganglia*); STN has no efferent projections to cortex. *cortex is thought to drive basal ganglia circuitry, n ...
... 1) primary motor cortex - major input to STN; arises from layer V; primarily collaterals of axons terminating elsewhere (STN is pivotal nucleus through which cortex influences output of basal ganglia*); STN has no efferent projections to cortex. *cortex is thought to drive basal ganglia circuitry, n ...
A Self-Organizing Neural Network That Learns to
... stage of neurons that receive motion input signals from prior stages. Whenthe system is exposed to manymotion sequences containing occlusion and disocclusion events, the stage gradually undergoes a self-organized bifurcation into two distinct pools of neurons, as shown in FIGURE4. These pools consis ...
... stage of neurons that receive motion input signals from prior stages. Whenthe system is exposed to manymotion sequences containing occlusion and disocclusion events, the stage gradually undergoes a self-organized bifurcation into two distinct pools of neurons, as shown in FIGURE4. These pools consis ...
Role of Feedforward and Feedback Projections in Figure
... The neurons in these latter areas have large receptive fields in order to integrate the elementary visual features. A classical receptive field is defined as the region of the visual scene from which a neuronal cell receives direct information by way of feedforward connections. Then, these cells res ...
... The neurons in these latter areas have large receptive fields in order to integrate the elementary visual features. A classical receptive field is defined as the region of the visual scene from which a neuronal cell receives direct information by way of feedforward connections. Then, these cells res ...
fMRI - Rackcdn.com
... activation of a sound-based representation of the target word (phonological processing). thus there is considerable overlap in the brain regions activated by production and comprehension tasks. The main goal of fMRI language mapping for presurgical planning is to: a) cerebral hemispheric language LA ...
... activation of a sound-based representation of the target word (phonological processing). thus there is considerable overlap in the brain regions activated by production and comprehension tasks. The main goal of fMRI language mapping for presurgical planning is to: a) cerebral hemispheric language LA ...
Commentary: Saccadic eye movements
... the control of visual fixation and saccadic eye movements. The superficial layers of the SC contain neurons that receive direct retinal inputs as well as inputs from other visual areas (Robinson and McClurkin, 1989). These visual neurons are organized into a visual map of the contralateral visual he ...
... the control of visual fixation and saccadic eye movements. The superficial layers of the SC contain neurons that receive direct retinal inputs as well as inputs from other visual areas (Robinson and McClurkin, 1989). These visual neurons are organized into a visual map of the contralateral visual he ...
Some Speculative Hypotheses about the Nature
... various other dance traditions. Having outlined how a movement sequence may bring about the feelings it does in certain dance performances, I will argue that choreographers like all other artists when creating a work, are implicitly led by the brain mechanisms underlying sensory experience and emoti ...
... various other dance traditions. Having outlined how a movement sequence may bring about the feelings it does in certain dance performances, I will argue that choreographers like all other artists when creating a work, are implicitly led by the brain mechanisms underlying sensory experience and emoti ...
Brain activity during non-automatic motor production of discrete multi
... associated with working memory, comparison, and response to þ/ cues. The TIMEPRESSURE contrast should therefore control for activity associated with these processes; because MOTOR involved only a simple motor response and no memory or comparison processes, however, the TIMEMOTOR contrast should o ...
... associated with working memory, comparison, and response to þ/ cues. The TIMEPRESSURE contrast should therefore control for activity associated with these processes; because MOTOR involved only a simple motor response and no memory or comparison processes, however, the TIMEMOTOR contrast should o ...
Visual adaptation: Neural, psychological and computational aspects
... of processing adapt and how plasticity occurring early in the processing stream impacts downstream areas. In macaque IT cortex, for example, neuronal adaptation has been reported to show greater selectivity than the response of the corresponding neuron, suggesting that adaptation is occurring at or ...
... of processing adapt and how plasticity occurring early in the processing stream impacts downstream areas. In macaque IT cortex, for example, neuronal adaptation has been reported to show greater selectivity than the response of the corresponding neuron, suggesting that adaptation is occurring at or ...
Research Presentation Slides - Emory University School of Medicine
... – Tremor at rest – Muscular rigidity ...
... – Tremor at rest – Muscular rigidity ...
Representation of the Visual Field in the Human Occipital Cortex
... Consecutive patients with visual field defects and occipital lobe lesions seen in the neuro-ophthalmology clinic at The Toronto Hospital, Toronto, Ontario, were screened using the central 30-2 threshold program of the Humphrey Field Analyzer (Allergan-Humphrey Instruments, San Leandro, Calif). Patie ...
... Consecutive patients with visual field defects and occipital lobe lesions seen in the neuro-ophthalmology clinic at The Toronto Hospital, Toronto, Ontario, were screened using the central 30-2 threshold program of the Humphrey Field Analyzer (Allergan-Humphrey Instruments, San Leandro, Calif). Patie ...
ppt - UC Davis Imaging Research Center
... across studies No studies have been run assessing whether behavioral effects vary according to the type of switch required Only recently have attempts been made to dissociate neural activity in regard to different types of shifts (Wager, et al., 2005). We focus on two types of shifts: Percep ...
... across studies No studies have been run assessing whether behavioral effects vary according to the type of switch required Only recently have attempts been made to dissociate neural activity in regard to different types of shifts (Wager, et al., 2005). We focus on two types of shifts: Percep ...
What insights can fMRI offer into the structure and function of mid-tier visual areas?
... total contrast as well as contrast at each of the contributing orientations (McDonald et al., 2012). This, however, means that the population average response (the fMRI signal) will be the same whether a high-contrast vertical grating, a high-contrast horizontal grating, or a high-contrast mixture o ...
... total contrast as well as contrast at each of the contributing orientations (McDonald et al., 2012). This, however, means that the population average response (the fMRI signal) will be the same whether a high-contrast vertical grating, a high-contrast horizontal grating, or a high-contrast mixture o ...
Full Article - CIHR Research Group in Sensory
... surprise that identical conditions can yield different results from one subject to the next. By examining the different strategies and their associated outcomes, we may gain valuable new insights into the neural mechanisms underlying this behaviour. The current study takes advantage of different beh ...
... surprise that identical conditions can yield different results from one subject to the next. By examining the different strategies and their associated outcomes, we may gain valuable new insights into the neural mechanisms underlying this behaviour. The current study takes advantage of different beh ...
Preprint - University of Pennsylvania School of Arts and Sciences
... and indicated when they saw a target image by shifting gaze to a response dot on the screen. Our experimental design included four images presented in all possible combinations as a visual stimulus, and as an intended target, resulting in 16 experimental conditions. We held the target image fixed fo ...
... and indicated when they saw a target image by shifting gaze to a response dot on the screen. Our experimental design included four images presented in all possible combinations as a visual stimulus, and as an intended target, resulting in 16 experimental conditions. We held the target image fixed fo ...
Investigating the neurocognitive deficits associated with chronic
... potential at around 300 ms following stimulus presentation ...
... potential at around 300 ms following stimulus presentation ...
Redgrave - people.vcu.edu
... learning, Thorndike placed a hungry cat in a cage, the door of which was held closed by a pin1. A peddle in the cage was connected to the pin, such that if the cat pressed the peddle, the pin was released and the door fell open. Outside the cage was a piece of fish. Progressively, the cat learned to ...
... learning, Thorndike placed a hungry cat in a cage, the door of which was held closed by a pin1. A peddle in the cage was connected to the pin, such that if the cat pressed the peddle, the pin was released and the door fell open. Outside the cage was a piece of fish. Progressively, the cat learned to ...
Science - Princeton University
... "posterior-pulvinar system" of the cat (6). These findings, and the facts that inferotemporal cortex receives afferents from both prestriate cortex and the pulvinar ( 4 ) , strongly suggest that this tissue receives and processes visual information from both the ipsilateral and the contralateral occ ...
... "posterior-pulvinar system" of the cat (6). These findings, and the facts that inferotemporal cortex receives afferents from both prestriate cortex and the pulvinar ( 4 ) , strongly suggest that this tissue receives and processes visual information from both the ipsilateral and the contralateral occ ...
The parietal cortex and episodic memory: an
... Because patients with parietal lobe damage do not show retrograde or anterograde amnesia, few investigators have assessed memory in these patients. Thus, subtle episodic-memory deficits may have been overlooked. A recent study of the effects of parietal lobe damage on autobiographical memory and epi ...
... Because patients with parietal lobe damage do not show retrograde or anterograde amnesia, few investigators have assessed memory in these patients. Thus, subtle episodic-memory deficits may have been overlooked. A recent study of the effects of parietal lobe damage on autobiographical memory and epi ...