Figure 5. Rat: peripheral recording of cardiac vagal efferent fibre with respiratory-related inputs.

A, four superimposed sweeps of the discriminated active unit. B-D, histograms of the activity of a cardiac vagal C fibre efferent triggered from: integrated phrenic nerve activity (B; 20 ms bins, 115 sweeps), the femoral arterial blood pressure wave (C; 5 ms bins, 1693 sweeps), and tracheal pressure (D; 20 ms bins, 337 sweeps). Above each histogram is an average of the respective trigger input.