The Journal of Neuroscience, February 22, 2006, ():
The Impact of a Corticotectal Impulse on the Awake Superior Colliculus
J. Neurosci. Bereshpolova et al.
26: 2250
Supplemental data
Files in this Data Supplement:
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Supplemental figure
a: Transition from attentive to inattentive state. Spontaneous activity of a CTect neuron and an LGNd neuron (simultaneously recorded) during a transition between alert and inattentive states. Vertical lines indicate individual action potentials of the two spike trains; stars above indicate "bursts". "Busts" consist of two or more spikes occurring at interspike intervals of < 4 ms, with the initial spike having a preceding interval of > 100 ms.. Multiple spikes within bursts cannot be resolved at the temporal resolution presented here. Lower traces show hippocampal and cortical EEG. The rabbit is alert during the initial 5 seconds of this record, the hippocampal EEG is dominated by 5-6 Hz "theta" activity and the cortex is desynchronized. At the point of transition to the inattentive state (vertical dotted line), the hippocampal EEG shifts, within a few hundred ms, to high voltage irregular activity, and cortical EEG becomes more synchronous. Note that whereas the spike train of the LGNd neuron becomes bursty during the inattentive state, the spike train of the CTect neuron does not.
b-c: 2-dimensional interspike interval plots show pattern of interspike intervals for same LGNd (b1, b2) and CTect (c1, c2) neurons shown in a, during alert (b1, c1) and inattentive (b2, c2) states. In these 2-D plots, each dot represents an impulse, related to both the preceding and following interspike interval. The spikes in the block on the lower right were initial spikes of a "burst" (as defined above). The spikes within the block to the lower left were the second spike of bursts that contained at least three spikes. In LGNd neuron, clear clustering occurs within these bins during the inattentive state. No such clustering is seen in the CTect neuron.
