Slow potentials in the dorsal parts of the isolated spinal cord and their relation to dorsal root potentials

Göpfert, H.

doi:10.1113/jphysiol.1956.sp005598

Cited by 5 publications

(2 citation statements)

References 20 publications

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“…The slow negative potential changes evoked in dorsal roots of the toad spinal cord by afferent volleys in adjacent dorsal roots were first described by Barron & Matthews (1938). Further investigations by Bonnet & Bremer (1938, 1952; by Dun & Feng (1944); by Eccles & Malcolm (1946); by Lloyd & McIntyre (1949) and by Gopfert (1956) have confirmed and extended these initial observations. Lloyd & McIntyre (1949) were able to distinguish in the dorsal root potentials (DRP) of the frog a series of potential changes, terminating in the prolonged negative potential described by Barron & Matthews (1938).…”

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confidence: 80%

Action of Some Drugs on the Dorsal Root Potentials of the Isolated Toad Spinal Cord

Király

Phillis

1961

British Journal of Pharmacology and Chemotherapy

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A series of drugs which potentiate or antagonize transmission at cholinergic synapses have been tested on the slow depolarizing dorsal root potentials evoked by stimulation of adjacent dorsal and ventral roots. Some drugs acted specifically on the dorsal root potential evoked by ventral root stimulation. Dihydro‐β‐erythroidine, atropine and acetylcholine depressed this potential, whilst anticholinesterase substances in low concentrations potentiated and in higher concentrations depressed it. It is concluded that the results offer some evidence for a cholinergic link in the pathway responsible for the generation of depolarizing potentials in the dorsal root subsequent to ventral root stimulation.

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confidence: 80%

Action of Some Drugs on the Dorsal Root Potentials of the Isolated Toad Spinal Cord

Király

Phillis

1961

British Journal of Pharmacology and Chemotherapy

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“…The properties of DRR both in the cat and the amphibian spinal cord have been investigated in some detail. It was recognized that the DRP and DRR had a common origin and several explanations of their interconnection have been suggested (MATTHEWS, 1934;BARRON andMATTHEWS, 1935, 1938;TOENNIES, 1938TOENNIES, , 1939DUN, 1939;BARRON, 1940;SKOGLUND and UvN~Is, t943;ECCLES and MALCOLM, 1946;BONNET and BREMER, 1952;HABGOOD, t953;BROOKS and Kolzum, t956;GOPFERT, 1956;McCoucH and AUSTIN, t958;TREGEAR, 1958;CALMA and QUAYLE, 1968;TEBECIS and PHILLIS, t968). Recently the recording of DRRs has mainly been used as a tool for the analysis of the functional organization of PAD (ECCLES, KOZAK and MAGNI, 1961 ;SCHMIDT and WILLIS, 1963b).…”

Section: Dorsal Root Reflexesmentioning

confidence: 99%

Presynaptic inhibition in the vertebrate central nervous system

Schmidt

Ergebnisse Der Physiologie Reviews of Physiology

312

141

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Central projections of selected spinal dorsal roots in anuran amphibians

Joseph

Whitlock

1968

Anat. Rec.

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The total central distribution of single brachial or lumbar dorsal roots has been assessed in toad (Bufo marinus) and in frog (Rana catesbeiana). Two methods were employed to examine the afferent fibers. The uranyl nitrate m o a c ation of the Nauta method (Nauta, '66) was used to study degenerating elements resulting from single root transection. A radioautographic tracing technique was also employed to examine the distribution of essentially normal afferent fibers. This latter method involved local injection of small amounts of L-leucine-H3 into a single ganglion of otherwise intact nerves and subsequent determination of location of the incorporated label in the CNS. The distribution was ascertained by counting silver grains microscopically in radioautographs of the CNS for standard sized areas. The results obtained by either method essentially were identical. All dorsal root projections are distributed unilaterally within the CNS. Fibers passed into a dorsolateral bundle and into the dorsal column. Collaterals from the dorsal column passed into the dorsal and intermediate gray matter, but no primary afferent fibers distributed within the ventral horn. Both brachial and lumbar roots distributed segmentally over approximately five spinal segments. Root fibers coursed rostrally in a somatotopically organized dorsal column. This pathway ultimately passed into the cerebellum. Some evidence was obtained in support of a dorsal column-medial lemniscal relay in anuran amphibians.

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Slow potentials in the dorsal parts of the isolated spinal cord and their relation to dorsal root potentials

Cited by 5 publications

References 20 publications

Action of Some Drugs on the Dorsal Root Potentials of the Isolated Toad Spinal Cord

Action of Some Drugs on the Dorsal Root Potentials of the Isolated Toad Spinal Cord

Presynaptic inhibition in the vertebrate central nervous system

Central projections of selected spinal dorsal roots in anuran amphibians

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