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How many neurons are in your hand?

Visual perception

Premotor cortex

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Book Chapter•DOI Grasping Objects and Grasping Action Meanings: The Dual Role of Monkey Rostroventral Premotor Cortex (Area F5) Giacomo Rizzolatti, Luciano Fadiga - Show less +1 more 01 Jan 1998 204 Citations	The interpretation we propose is that these two categories of F5 neurons both generate an internal copy of a potential hand action.
Journal Article•DOI Selectivity for the shape, size, and orientation of objects for grasping in neurons of monkey parietal area AIP. Akira Murata, Vittorio Gallese, Giuseppe Luppino, Masakazu Kaseda, Hideo Sakata - Show less +4 more 01 May 2000-Journal of Neurophysiology 809 Citations	The activity of motor-dominant neurons was also, in part, likely to represent these parameters of hand movement.
Journal Article•DOI Role of primate magnocellular red nucleus neurons in controlling hand preshaping during reaching to grasp. Peter L. E. van Kan, Martha L. McCurdy - Show less +1 more 01 Apr 2001-Journal of Neurophysiology 57 Citations	Therefore RNm neurons can at best only make a minor contribution to the control of reaching movements that lack hand use.
Journal Article•DOI Corticospinal neurons with a special role in precision grip. R.B. Muir, R.N. Lemon - Show less +1 more 21 Feb 1983-Brain Research 462 Citations	We have identified in the motor cortex of a conscious monkey, neurons which have a direct exitatory influence on spinal motoneurons of intrinsic hand muscles.
Open access•Journal Article•DOI Hand Orientation during Reach-to-Grasp Movements Modulates Neuronal Activity in the Medial Posterior Parietal Area V6A Patrizia Fattori, Rossella Breveglieri, Nicoletta Marzocchi, Daniela Filippini, Annalisa Bosco, Claudio Galletti - Show less +5 more 11 Feb 2009-The Journal of Neuroscience 143 Citations	The present results confirm this finding and demonstrate, for the first time, that during reach-to-grasp, V6A neurons are also modulated by the orientation of the hand.

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