Participation of cortical and thalamic cells in the feline association system to thalamocortical recruiting responses.
Pairs of neurons located in mutually related sites in cortex (middle suprasylvian gyrus) and specific thalamus (n. lateralis posterior and pulvinar), were recorded simultaneously during recruitment responses. Cortical neurons showed an increased firing probability in association with the surface negative cortical recruiting waves, this phase being followed by a period of firing depression. One group of thalamic neurons, identified as thalamocortical, fired earlier than the simultaneously recorded cortical units. A second group was silenced during the period of cortical firing but tended to fire action potentials during the period of cortical firing depression. These data show that thalamic neurons in specific nuclei are involved in the process of thalamocortical recruitment.
D000818:Animals; D001244:Association; D002415:Cats; D002540:Cerebral Cortex / Q000166:cytology / Q000502:physiology*; D004558:Electric Stimulation; D009431:Neural Conduction; D009474:Neurons / Q000502:physiology*; D011999:Recruitment, Neurophysiological; D013788:Thalamus / Q000166:cytology / Q000502:physiology*