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Brain Res. 1986 Aug 13;380(1):83-93.

Somatovesical and vesicovesical excitatory reflexes in urethane-anaesthetized rats.


The effect of spinal cord transection on excitatory somato- and vesicovesical micturition reflexes have been investigated in urethane-anaesthetized rats. In adult rats, 3 distinct types of excitatory reflexes to the bladder may be observed: a somatovesical reflex organized at spinal level and two vesicovesical reflexes organized at spinal and supraspinal level, respectively. In agreement with results of lesion experiments (Neurosci. Lett., 8 (1978) 27-33), bladder voiding is abolished following spinal cord transection although both somato- and vesicovesical reflexes may be demonstrated in acute spinal rats. Occurrence of the spinal vesicovesical reflex during the collecting phase of the cystometrogram appears to be inhibited by a supraspinal inhibitory pathway.

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