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. Author manuscript; available in PMC: 2015 Aug 11.
Published in final edited form as: Prog Brain Res. 2014;212:297–335. doi: 10.1016/B978-0-444-63488-7.00015-X

FIGURE 9.

FIGURE 9

Spontaneous activity of nonrespiratory bursting (NRB) neurons in PAm is correlated with bursting in the contralateral HVC. A, Simultaneous recordings of two single units in the left PAm while maintaining the same unit in the contralateral HVC. For the top pair, the recording electrode was placed closer to a site showing the characteristic nonrespiratory bursting pattern. Bursts in these neurons occur at approximately the same time as bursts (and subsequent pauses) in HVC. In the bottom pair, a respiratory neuron recorded several minutes after the unit on the left shows a complete lack of correlated activity with the same HVC neuron.