Reflexes to sacral parasympathetic neurones concerned with micturition in the cat
Article first published online: 1 JAN 1969
© 1969 The Physiological Society
The Journal of Physiology
Volume 200, Issue 1, pages 87–108, January 1, 1969
How to Cite
1969), Reflexes to sacral parasympathetic neurones concerned with micturition in the cat. The Journal of Physiology, 200 doi: 10.1113/jphysiol.1969.sp008683., , (
- Issue published online: 1 JAN 1969
- Article first published online: 1 JAN 1969
- Cited By
1. Reflexes to sacral parasympathetic neurones were studied by electrophysiological techniques in decerebrate, in chloralose-anaesthetized, and in chronic spinal cats.
2. Excitatory reflexes from pelvic nerve and sacral somatic afferent nerve fibres were present before and after chronic transection of the spinal cord, but the latencies differed markedly. It was concluded that the long-latency reflexes observed when the spinal cord was intact involved long-loop reflexes to the brain-stem. The weak, short-latency reflexes in the chronic spinal cat were never observed when the spinal cord was intact and could be due to reorganized spinal connexions. The short-latency reflexes are probably unimportant in normal micturition.
3. Stimulation of afferent fibres in the pelvic or sacral somatic nerves produced short-latency inhibitory post-synaptic potentials (IPSPs) and inhibition of discharges in parasympathetic neurones. This inhibition was due to a spinal reflex.
4. A local reflex was demonstrated in the pelvic plexus. This was probably a cholinergic axon reflex, but the remote possibility that it was a local cholinergic reflex involving sensory neurones in the bladder wall has not been excluded.