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The aim is to understand how neurons in the parietal cortex reflect perceptual decision-making based on visual stimuli.

Neural Basis of a Perceptual Decision in the Parietal Cortex (Area LIP) of the Rhesus Monkey

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The aim is to understand how neurons in the parietal cortex reflect perceptual decision-making based on visual stimuli.
Recorded activity of single neurons in area LIP of two trained rhesus monkeys.
Monkeys discriminated motion direction in random-dot visual stimuli using eye movements.
Analyzed firing rates of neurons in response to motion signals.
Neural activity predicted monkeys' direction judgments with varying reliability based on motion strength.
Stronger motion signals toward the response field elicited larger neural responses earlier in motion viewing.
When motion was away from the response field, stronger signals suppressed ongoing neuronal activity.

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Randomized trial investigates neural activity's role in motion direction judgment in monkeys, indicating sensory signal accumulation.

Shadlen et al. (2001) studied this question.

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