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Two Classes of Cells in the Posterior Parietal Cortex emerge during real-time sensory-motor learning in awake-behaving monkeys

In movement neuroscience monkeys are usually trained before neural recordings take place. Here we examined awake-behaving animals as they learned in real time to avoid spatial obstacles in three dimensions during reaching movements. These are a subset of cells that we tracked as the animal learned to stabilize the hand's movement speed. This figure shows the changes in the firing rates that these cells underwent during the planning of the obstacle avoidance, before the movement onset and then their recovery back to their base state of automatic straight reaches for which the animals had been trained. The narrow spiking cells (red waveforms) increased their rates during the memory (planning ) epoch whereas the broad spiking cells (blue waveforms) decreased their rates during the memory period and in a matter of minutes the same cells recovered from those changes and returned to their original firing rates.

Science > Neuroscience > Integrative Neuroscience

Science > Neuroscience > Neural Circuits

Science > Neuroscience > Neuroprosthetics

Science > Neuroscience > Neuroscience Methods

Science > Neuroscience > Systems Neuroscience

Science > Physiology > Integrative Physiology

Keywords: Posterior parietal cortex, reaching movements, reaching and grasping movements, obstacle avoidance, Obstacle navigation, rhesus macaque, Adaptation, Physiological, Motor Skills, speed control, delayed rewarded tasks, planning and control model, Motor planning, motor plasticity, trajectory generation, trajectory, trajectory inference, space-time configurations, space-time dynamics, Space-Time

Posted by: Elizabeth B Torres

Posted on: 19 Mar 2013

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