[Cortical modulations of the fine temporal structures of impulse trains in the dorsal lateral geniculate body in cats].
In response to a visual stimulation, "replicated triplets" of impulses may appear in many spike trains recorded from the cat dorsal lateral geniculate nucleus (dLGN). The number and the temporal structure of these triplets depend upon the general organization of the geniculate impulse trains. In this study, we show that a pharmacological blockade of the corticothalamic activity, obtained through microinjection of GABA into area 17, affects the replicated triplet production and leads to an increase in the dispersal of their structure. These results suggest that the corticothalamic pathway closely influences the fine temporal organization of the geniculate messages.
Beaux
J C
JC
Institut des Neurosciences du C.N.R.S., Université Pierre-et-Marie-Curie, Département des Neurosciences de la Vision, Paris.
Lestienne
R
R
Imbert
M
M
Grandjean
B
B
D000818:Animals; D002415:Cats; D002540:Cerebral Cortex / Q000187:drug effects / Q000502:physiology*; D005829:Geniculate Bodies / Q000187:drug effects / Q000502:physiology*; D007175:Impulsive Behavior / Q000503:physiopathology; D010775:Photic Stimulation; D013788:Thalamus / Q000187:drug effects / Q000502:physiology; D005680:gamma-Aminobutyric Acid / Q000494:pharmacology
D005680:gamma-Aminobutyric Acid
Modulations corticales de la structure temporelle fine des trains d'impulsions dans le corps genouillé latéral dorsal du Chat.