[Neural codes for perception].
OBJECTIVE
This article describes experiments designed to show the neural codes associated with the perception and processing of tactile information.


METHODS
The results of these experiments have shown the neural activity correlated with tactile perception. The neurones of the primary somatosensory cortex (S1) represent the physical attributes of tactile perception. We found that these representations correlated with tactile perception. By means of intracortical microstimulation we demonstrated the causal relationship between S1 activity and tactile perception. In the motor areas of the frontal lobe is to be found the connection between sensorial and motor representation whilst decisions are being taken.


CONCLUSIONS
S1 generates neural representations of the somatosensory stimuli which seen to be sufficient for tactile perception. These neural representations are subsequently processed by central areas to S1 and seem useful in perception, memory and decision making.
Romo
R
R
Instituto de Fisiología Celular; Universidad Nacional Autónoma de Mexico, Mexico DF, 04510, Mexico. rromo@ifisiol.unam.mx
Salinas
E
E
Hernández
A
A
Zainos
A
A
Lemus
L
L
de Lafuente
V
V
Luna
R
R
D001921:Brain / Q000502:physiology*; D006801:Humans; D009474:Neurons / Q000502:physiology; D010465:Perception / Q000502:physiology*; D013003:Somatosensory Cortex / Q000502:physiology; D014110:Touch / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology