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Table 1.

Summary of the effects of superfusion with Cl--free artificial cerebrospinal fluid on ventilatory burst activity in Rana catesbeiana tadpole and adult brainstem preparations at 20-22°C

Tadpole (N=10)Adults (N=7)
ControlCl--freeRecoveryControlCl--freeRecovery
Lung burst frequency (min-10.8±0.2 1.1±0.1 0.4±0.2 3.1±0.7 0.4±0.03* 2.6±0.7 
Lung burst duration(s) 8.3±2.6 10.4±3.0 11.9±3.0 1.4±0.3 14.2±5.0* 2.1±0.9 
Lung burst amplitude (% control) 100 382±52* 194±63 100 115±19 87±12 
Gill burst frequency (min-141.6±3.3 0* 32.4±4.4    
Tadpole (N=10)Adults (N=7)
ControlCl--freeRecoveryControlCl--freeRecovery
Lung burst frequency (min-10.8±0.2 1.1±0.1 0.4±0.2 3.1±0.7 0.4±0.03* 2.6±0.7 
Lung burst duration(s) 8.3±2.6 10.4±3.0 11.9±3.0 1.4±0.3 14.2±5.0* 2.1±0.9 
Lung burst amplitude (% control) 100 382±52* 194±63 100 115±19 87±12 
Gill burst frequency (min-141.6±3.3 0* 32.4±4.4    

Values are means ± S.E.M.

*

Significantly different from the control value (P<0.01).

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