Abstract
1. Electrical stimulation of spinal sensory nerves evoked discharges in inferior cardiac and renal nerves. In the anaesthetized cat both an early and a late response could be recorded in each nerve.
2. For any one afferent input the central delay of the late cardiac nerve response was significantly less than that of the late renal nerve response. The central delay of the early responses was similar for both nerves. In the spinal cat only the early response was present.
3. Cooling the floor of the 4th ventricle abolished the late responses in renal nerves, but left reflex volleys in white rami and intercostal nerves unchanged.
4. Stimulation in the brain stem evoked responses in both cardiac and renal nerves which had a shorter latency than the reflexes evoked in these nerves by stimulating dorsal roots.
5. The late responses could be abolished by lesions in the cervical spinal cord.
6. Such evidence led to the conclusion that there are two pathways for reflex discharge into inferior cardiac and renal nerves, one involving a supraspinal relay and the other confined to the spinal cord.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bradford J. R. The Innervation of the Renal Blood Vessels. J Physiol. 1889 Jul;10(5):358–432.18. doi: 10.1113/jphysiol.1889.sp000308. [DOI] [PMC free article] [PubMed] [Google Scholar]
- DOWNMAN C. B. Skeletal muscle reflexes of splanchnic and intercostal nerve origin in acute spinal and decerebrate cats. J Neurophysiol. 1955 May;18(3):217–235. doi: 10.1152/jn.1955.18.3.217. [DOI] [PubMed] [Google Scholar]
- Downman C. B., McSwiney B. A. Reflexes elicited by visceral stimulation in the acute spinal animal. J Physiol. 1946 Jul 15;105(1):80–94. [PMC free article] [PubMed] [Google Scholar]
- GERNANDT B. E., SHIMAMURA M. Mechanisms of interlimb reflexes in cat. J Neurophysiol. 1961 Nov;24:665–676. doi: 10.1152/jn.1961.24.6.665. [DOI] [PubMed] [Google Scholar]
- KERR F. W., ALEXANDER S. DESCENDING AUTONOMIC PATHWAYS IN THE SPINAL CORD. Arch Neurol. 1964 Mar;10:249–261. doi: 10.1001/archneur.1964.00460150019002. [DOI] [PubMed] [Google Scholar]
- Langley J. N. Vaso-motor centres: Part III. Spinal vascular (and other autonomic) reflexes and the effect of strychnine on them. J Physiol. 1924 Oct 9;59(2-3):231–258. doi: 10.1113/jphysiol.1924.sp002179. [DOI] [PMC free article] [PubMed] [Google Scholar]
- MUKHERJEE S. R. Effect of bladder distension on arterial blood pressure and renal circulation in acute spinal cats. J Physiol. 1957 Sep 30;138(2):300–306. doi: 10.1113/jphysiol.1957.sp005852. [DOI] [PMC free article] [PubMed] [Google Scholar]
- SELL R., ERDELYI A., SCHAEFER H. Untersuchungen über den Einfluss peripherer Nervenreizung auf die sympathische Aktivität. Pflugers Arch. 1958;267(6):566–581. doi: 10.1007/BF00362960. [DOI] [PubMed] [Google Scholar]
- SHIMAMURA M., LIVINGSTON R. B. Longitudinal conduction systems serving spinal and brain-stem coordination. J Neurophysiol. 1963 Mar;26:258–272. doi: 10.1152/jn.1963.26.2.258. [DOI] [PubMed] [Google Scholar]
- Sherrington C. S., Sowton S. C. Observations on reflex responses to single break-shocks. J Physiol. 1915 Jul 5;49(5):331–348. doi: 10.1113/jphysiol.1915.sp001713. [DOI] [PMC free article] [PubMed] [Google Scholar]
- WEIDINGER H., FEDINA L., KEHREL H., SCHAEFER H. [On the localization of the "bulbar sympathetic center" and its modifications by respiration and blood pressure]. Z Kreislaufforsch. 1961 Mar;50:229–241. [PubMed] [Google Scholar]