Excitatory-inhibitory processes in parietal association neurons during reticular activation and sleep-waking cycle.
Excitatory-inhibitory processes of parietal association neurons were studied during reticular-induced EEG activation and natural sleep-waking cycle. The probability of antidromic invasion in long-axon cells is enhanced following midbrain reticular stimulation and during both waking (W) and desynchronized sleep (D) states compared to slow-wave sleep. The thalamically elicited inhibitory phase occurs with a shorter latency following reticular stimulation and during W and D states; this is due to the reduced duration, during all these experimental conditions, of secondary excitatory processes. The duration of the inhibitory period is shorter during reticular activation; the postinhibitory rebound occurs at shorter latencies and is sharper following reticular stimulation and during W and D states. The similarity between reticular effects and changes during both W and D states is discussed.
D000818:Animals; D001143:Arousal / Q000502:physiology; D001369:Axons / Q000502:physiology; D001933:Brain Stem / Q000502:physiology; D002415:Cats; D005071:Evoked Potentials; D009433:Neural Inhibition; D009474:Neurons / Q000502:physiology; D010296:Parietal Lobe / Q000502:physiology*; D012154:Reticular Formation / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology*; D013569:Synapses / Q000502:physiology; D013788:Thalamus / Q000502:physiology; D014851:Wakefulness / Q000502:physiology*