The execution of a simple painting task invokes a chain of processing that includes visual acquisition of the target, coordination of multimodal proprioceptive signals, and ultimately the generation of a motor command that will drive the finger to the desired target location. These processes in the sensorimotor chain can be described in terms of infernal representations of the target or limb positions and coordinate transformations between different internal reference frames. In this article we first describe how different types of error analysis can be used to identify properties of the internal representations and coordinate transformations within the central nervous system. We then describe a series of experiments in which subjects pointed to remembered 3D visual targets under two lighting conditions (dim light and total darkness) and after two different memory delays (0.5 and 5.0 s) and report results in terms of variable error, constant error, and local distortion. Finally, we present a set of simulations to help explain the patterns of errors produced in this pointing task. These analyses and experiments provide insight into the structure of the underlying sensorimotor processes employed by the central nervous system.

Mcintyre, J., Stratta, F., Droulez, J., Lacquaniti, F. (2000). Analysis of pointing errors reveals properties of data representations and coordinate transformations within the central nervous system. NEURAL COMPUTATION, 12(12), 2823-2855.

Analysis of pointing errors reveals properties of data representations and coordinate transformations within the central nervous system

LACQUANITI, FRANCESCO
2000-01-01

Abstract

The execution of a simple painting task invokes a chain of processing that includes visual acquisition of the target, coordination of multimodal proprioceptive signals, and ultimately the generation of a motor command that will drive the finger to the desired target location. These processes in the sensorimotor chain can be described in terms of infernal representations of the target or limb positions and coordinate transformations between different internal reference frames. In this article we first describe how different types of error analysis can be used to identify properties of the internal representations and coordinate transformations within the central nervous system. We then describe a series of experiments in which subjects pointed to remembered 3D visual targets under two lighting conditions (dim light and total darkness) and after two different memory delays (0.5 and 5.0 s) and report results in terms of variable error, constant error, and local distortion. Finally, we present a set of simulations to help explain the patterns of errors produced in this pointing task. These analyses and experiments provide insight into the structure of the underlying sensorimotor processes employed by the central nervous system.
2000
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore BIO/09 - FISIOLOGIA
English
3-DIMENSIONAL SPACE; NEURONAL POPULATION; PARIETAL CORTEX; VISUAL TARGETS; MOVEMENTS; DIRECTION; DISTANCE; HAND; INFORMATION; ACCURACY
Mcintyre, J., Stratta, F., Droulez, J., Lacquaniti, F. (2000). Analysis of pointing errors reveals properties of data representations and coordinate transformations within the central nervous system. NEURAL COMPUTATION, 12(12), 2823-2855.
Mcintyre, J; Stratta, F; Droulez, J; Lacquaniti, F
Articolo su rivista
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/50019
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact