scholarly journals Impaired Reversal Learning in APPPS1-21 Mice in the Touchscreen Visual Discrimination Task

2019 ◽  
Vol 13 ◽  
Author(s):  
Lore Van den Broeck ◽  
Pierre Hansquine ◽  
Zsuzsanna Callaerts-Vegh ◽  
Rudi D’Hooge
Keyword(s):  
Reversal Learning ◽  
Visual Discrimination ◽  
Discrimination Task ◽  
Visual Discrimination Task

scholarly journals Selective effects of 5-HT2C receptor modulation on performance of a novel valence-probe visual discrimination task and probabilistic reversal learning in mice

2018 ◽  
Vol 235 (7) ◽  
pp. 2101-2111 ◽  
Author(s):  
Benjamin U. Phillips ◽  
Sigma Dewan ◽  
Simon R. O. Nilsson ◽  
Trevor W. Robbins ◽  
Christopher J. Heath ◽  
...  
Keyword(s):  
Reversal Learning ◽  
Visual Discrimination ◽  
Discrimination Task ◽  
Visual Discrimination Task ◽  
Receptor Modulation ◽  
Selective Effects ◽  
Probabilistic Reversal Learning

Pigeons deploy selective attention to efficiently learn a stagewise multidimensional visual discrimination task.

2018 ◽  
Vol 44 (2) ◽  
pp. 162-167 ◽  
Author(s):  
Olga V. Vyazovska ◽  
Victor M. Navarro ◽  
Edward A. Wasserman
Keyword(s):  
Selective Attention ◽  
Visual Discrimination ◽  
Discrimination Task ◽  
Visual Discrimination Task

d-Serine alleviates retrograde amnesia of a visual discrimination task in rats with a lesion of the perirhinal cortex

2003 ◽  
Vol 979 (1-2) ◽  
pp. 240-244 ◽  
Author(s):  
Jannike M. Andersen ◽  
Frode Fonnum ◽  
Trond Myhrer
Keyword(s):  
Retrograde Amnesia ◽  
Visual Discrimination ◽  
Discrimination Task ◽  
Perirhinal Cortex ◽  
Visual Discrimination Task

Activity of single neurons in the monkey amygdala during performance of a visual discrimination task

1992 ◽  
Vol 67 (6) ◽  
pp. 1447-1463 ◽  
Author(s):  
K. Nakamura ◽  
A. Mikami ◽  
K. Kubota
Keyword(s):  
Visual Stimulus ◽  
Visual Discrimination ◽  
Discrimination Task ◽  
Discharge Rate ◽  
Visual Stimuli ◽  
Delay Period ◽  
Visual Discrimination Task ◽  
Single Neurons ◽  
Visual Neurons ◽  
Human Faces

1. The activity of single neurons was recorded extracellularly from the monkey amygdala while monkeys performed a visual discrimination task. The monkeys were trained to remember a visual stimulus during a delay period (0.5-3.0 s), to discriminate a new visual stimulus from the stimulus, and to release a lever when the new stimulus was presented. Colored photographs (human faces, monkeys, foods, and nonfood objects) or computer-generated two-dimensional shapes (a yellow triangle, a red circle, etc.) were used as visual stimuli. 2. The activity of 160 task-related neurons was studied. Of these, 144 (90%) responded to visual stimuli, 13 (8%) showed firing during the delay period, and 9 (6%) responded to the reward. 3. Task-related neurons were categorized according to the way in which various stimuli activated the neurons. First, to evaluate the proportion of all tested stimuli that elicited changes in activity of a neuron, selectivity index 1 (SI1) was employed. Second, to evaluate the ability of a neuron to discriminate a stimulus from another stimulus, SI2 was employed. On the basis of the calculated values of SI1 and SI2, neurons were classified as selective and nonselective. Most visual neurons were categorized as selective (131/144), and a few were characterized as nonselective (13/144). Neurons active during the delay period were also categorized as selective visual and delay neurons (6/13) and as nonselective delay neurons (7/13). 4. Responses of selective visual neurons had various temporal and stimulus-selective properties. Latencies ranged widely from 60 to 300 ms. Response durations also ranged widely from 20 to 870 ms. When the natures of the various effective stimuli were studied for each neuron, one-fourth of the responses of these neurons were considered to reflect some categorical aspect of the stimuli, such as human, monkey, food, or nonfood object. Furthermore, the responses of some neurons apparently reflected a certain behavioral significance of the stimuli that was separate from the task, such as the face of a particular person, smiling human faces, etc. 5. Nonselective visual neurons responded to a visual stimulus, regardless of its nature. They also responded in the absence of a visual stimulus when the monkey anticipated the appearance of the next stimulus. 6. Selective visual and delay neurons fired in response to particular stimuli and throughout the subsequent delay periods. Nonselective delay neurons increased their discharge rates gradually during the delay period, and the discharge rate decreased after the next stimulus was presented. 7. Task-related neurons were identified in six histologically distinct nuclei of the amygdala.(ABSTRACT TRUNCATED AT 400 WORDS)

Measurement of MEG Evoked by Visual Discrimination Task

Biomag 96 ◽  
2000 ◽  
pp. 813-816
Author(s):  
T. Kumagai ◽  
T. Takeda ◽  
H. Endo
Keyword(s):  
Visual Discrimination ◽  
Discrimination Task ◽  
Visual Discrimination Task

scholarly journals Volatiles emitted from the leaves of Laurus nobilis L. improve vigilance performance in visual discrimination task

2011 ◽  
Vol 32 (1) ◽  
pp. 19-28 ◽  
Author(s):  
Eri Matsubara ◽  
Mio Fukagawa ◽  
Tsuyoshi Okamoto ◽  
Atsuko Fukuda ◽  
Chikako Hayashi ◽  
...  
Keyword(s):  
Visual Discrimination ◽  
Discrimination Task ◽  
Visual Discrimination Task ◽  
Laurus Nobilis ◽  
Vigilance Performance
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