Is there a preferred direction of bristle movement?

Is there a preferred direction of bristle movement? Is the spiking response different in different directions? Is the response tonic (sustained during a steady deflection is maintained) or phasic (responding to movement only at the onset or offset of a stimulus? 2.4 (5 points) If you can evoke activity from different bristles, are the evoked spikes different in amplitude? If there is spontaneous activity, can you tell if the evoked activity is an increase in firing frequency of one of the spontaneous units, or a new unit? 2.5 (5 points* *) Do you see a response (to flexing/extending the leg)? Is it phasic or tonic? Does the response differ between flexion or extension? How does the response change as you extend the leg so that it is completely extended or flexed? 2.6 (10 points) Propose and describe some different mechanisms that might underlie the phasic responses of mechanosensory bristles. Consider all stages of transduction and encoding. 2.7 (5 points). If your data (use example data files if not) showed both spontaneous and stimulus-evoked activity: Did the neurons that fired stimulus- evoked action potentials also fire spontaneously? – provide evidence to justify your answer.