On the Relations between the Direction of Two-Dimensional Arm Movements and Cell Discharge in Primate Motor Cortex.¶
Georgopoulos, A. P., Kalaska, J. F., Caminiti, R., & Massey, J. T. (1982). On the Relations between the Direction of Two-Dimensional Arm Movements and Cell Discharge in Primate Motor Cortex. Journal of Neuroscience, 2(11), 1527-1537.
Cited by¶
1 citation across 1 artifact.
Each citation links to the sentence it supports in the citing article.
Primes¶
- Population Coding
- The population of individually-noisy tuned elements is a set of motor-cortex neurons, each with a cosine tuning curve: neuron \(i\) fires maximally for its preferred direction \(\vec{c}_i\) and its firing rate falls off as \(r_i = b + m\cos(\theta - \theta_i)\) as the actual direction \(\theta\) departs from its preferred \(\theta_i\).
This sourceEstablishes the cosine (sinusoidal) tuning of motor-cortex neurons to movement direction.
Supported in partVerified against the publisher's abstract
The abstract supports cosine (sinusoidal) directional tuning, D = b0 + c1cos(theta - theta0), but only for a subset of directionally tuned cells (74.6% of 323), not for each neuron as claimed.
“The frequency of discharge of 241 of the 323 cells (74.6%) varied in an orderly fashion with the direction of movement. Discharge was most intense with movements in a preferred direction and was reduced gradually when movements were made in directions farther and farther away from the preferred one. This resulted in a bell-shaped directional tuning curve. These relations were observed for cell discharge during the …”
- The population of individually-noisy tuned elements is a set of motor-cortex neurons, each with a cosine tuning curve: neuron \(i\) fires maximally for its preferred direction \(\vec{c}_i\) and its firing rate falls off as \(r_i = b + m\cos(\theta - \theta_i)\) as the actual direction \(\theta\) departs from its preferred \(\theta_i\).
Verification¶
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Registry ID ref:12aefe1e4786 · see in the full table