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Fig. 3. Simulated cement gland attachment reduces responses to dimming and spontaneous swimming of immobilised tadpoles. A suction electrode on the motor nerve or ventral root (vr) records fictive swimming. (A) Examples of fictive responses to a dim (LED). When unattached, rhythmic bursts in the vr indicate that swimming is initiated, but with the weight attached there is no response. (B) Percentage of dims initiating fictive swimming in the unattached (black bar) and weight attached (white bar) states. Values are means + S.D. (N=16). Weight attachment significantly reduced the % of responses to dimming (**P<0.001). (C) The frequency of spontaneous fictive swims measured over 10 min in the unattached (black bar) and weight attached (white bar) states (means + S.D., N=12). Weight attachment significantly reduces the number of spontaneous swims (*P=0.009).





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