Home LiteratureArticle Details
PMID: 1149839 Published · ppublish English Journal Article

The dorsal column system: I. Existence of long ascending postsynaptic fibres in the cat's fasciculus gracilis.

Experimental brain research ·Vol. 22 ·No. 5 ·1975-05-22 ·Pages 457-70

Angaut-Petit D

Abstract

Microelectrode recordings were made from dorsal column fibres at the 12th thoracic segment in cats. Two kinds of activity were elicited by electric shocks applied on the sciatic nerve in the popliteal fossa: primary afferent activity and trans-synaptically evoked activity. The dorsal column postsynaptic (DCPS) fibres represented 9.3% of the total population of fibres studied in the fasciculus gracilis and 14.5% of those with receptors in the skin. They were found to lie between the primary fibres of cutaneous and those of deep origin. The fastest fibres of the alpha range contributed to their activation and it is likely that C fibres contributed as well. 87% of the DCPS fibres studied at Th 12 were antidromically activated from the first cervical segment, and their conduction velocities measured between cervical and thoracic levels ranged from 16 to 71 m/sec.

MeSH Terms
Animals Cats Cervical Vertebrae Electric Conductivity Electric Stimulation Evoked Potentials Laminectomy Neck Neurons/physiology Neurons, Afferent/physiology Sensory Receptor Cells/physiology Skin Physiological Phenomena Spinal Cord/physiology Synapses/physiology Thoracic Vertebrae
Authors & Affiliations
1 authors, click to expand affiliations / ORCID
Angaut-Petit D
References (27)
27 references, click to expand
  1. Receptor types in cat hairy skin supplied by myelinated fibers.
    J Neurophysiol. 1968 Nov;31(6):833-48 PMID: 5710537
  2. The dorsal column system: II. Functional properties and bulbar relay of the postsynaptic fibres of the cat's fasciculus gracilis.
    Exp Brain Res. 1975 May 22;22(5):471-93 PMID: 1149840
  3. Intramuscular propagation of sensory impulses.
    J Physiol. 1959 Oct;148:240-51 PMID: 14429834
  4. An inquiry into the neurophysiological basis for pain.
    J Neurosurg. 1969 Jan;30(1):1-13 PMID: 5766611
  5. Origin of the dorsal root reflex.
    J Neurophysiol. 1956 Jan;19(1):60-74 PMID: 13286722
  6. Activation of descending control of the spinocervical tract by impulses ascending the dorsal columns and relaying through the dorsal column nuclei.
    J Physiol. 1973 Dec;235(2):535-50 PMID: 4357940
  7. Fasciculi proprii of the spinal cord in man.
    Brain. 1959 Dec;82:610-68 PMID: 14426157
  8. Studies on modality segregation and second-order neurones in the dorsal funiculus.
    Experientia. 1966 Jul 15;22(7):441-2 PMID: 5964096
  9. Physiological properties of unmyelinated fiber projection to the spinal cord.
    Exp Neurol. 1966 Nov;16(3):316-32 PMID: 5928985
  10. Response of somatosensory cerebral neurons to stimulation of dorsal and dorsolateral spinal funiculi.
    Exp Neurol. 1974 Apr;43(1):124-42 PMID: 4362049
  11. Responses of dorsal horn cells of M. mulatta to cutaneous and sural nerve A and C fiber stimuli.
    J Neurophysiol. 1969 Nov;32(6):803-17 PMID: 4981517
  12. Postsynaptic fibres in the dorsal columns and their relay in the nucleus gracilis.
    Brain Res. 1972 Dec 24;48:380-4 PMID: 4645213
  13. Non-primary afferents to the cuneate nucleus in the brachial dorsal funiculus of the cat.
    Brain Res. 1974 Jul 26;75(2):247-59 PMID: 4841918
  14. Functional organization of long, second-order afferents in the dorsal funiculus.
    Exp Brain Res. 1968;4(4):377-82 PMID: 5712692
  15. [Demonstration of fibers with postsynaptic activity at the level of dorsal columns in cats].
    J Physiol (Paris). 1969;61 Suppl 2:372-3 PMID: 5384904
  16. THE SPINOCERVICAL TRACT: DORSAL COLUMN LINKAGE, CONDUCTION VELOCITY, PRIMARY AFFERENT SPECTRUM.
    Exp Neurol. 1965 Sep;13:1-21 PMID: 14344439
  17. Projection of different spinal pathways to the second somatic sensory area in cat.
    Acta Physiol Scand Suppl. 1962;56(194):1-74 PMID: 13861333
  18. Characteristics of second pain and flexion reflexes indicative of prolonged central summation.
    Exp Neurol. 1972 Nov;37(2):371-87 PMID: 4637957
  19. Dorsal column projection of receptors in cat hairy skin supplied by myelinated fibers.
    J Neurophysiol. 1968 Nov;31(6):849-55 PMID: 5710538
  20. Studies on sensation interpreted as pain: center nervous system pathways.
    Clin Neurosurg. 1962;8:271-81 PMID: 13880622
  21. Conduction velocities of lemniscal and thalamocortical fibers: their somatotopic differentiation and a rule of connection in the thalamic relay system.
    Brain Res. 1972 Sep 29;44(2):666-9 PMID: 5075713
  22. Repetitive discharge of neurons.
    J Neurophysiol. 1959 May;22(3):305-20 PMID: 13642103
  23. The cytoarchitectonic organization of the spinal cord in the cat.
    J Comp Neurol. 1952 Jun;96(3):414-95 PMID: 14946260
  24. Non-primary afferents to the nucleus gracilis from the lumbar cord of the ct.
    Brain Res. 1973 Mar 15;51:81-95 PMID: 4706028
  25. FUNCTIONAL ORGANIZATION IN THE TRIGEMINAL MAIN SENSORY AND ROSTRAL SPINAL NUCLEI OF THE CAT.
    J Physiol. 1963 Aug;168:129-46 PMID: 14056482
  26. RESPONSES OF SINGLE DORSAL CORD CELLS TO PERIPHERAL CUTANEOUS UNMYELINATED FIBRES.
    Nature. 1965 Apr 3;206:97-9 PMID: 14334366
  27. Fibre content of the posterior column and synaptic connections of nucleus gracilis.
    Z Zellforsch Mikrosk Anat. 1951;36(4):381-400 PMID: 14932321
Article Info
Journal
Experimental brain research
Abbr.
Exp Brain Res
ISSN
0014-4819
DOI
10.1007/BF00237348
Published
1975-05-22
Pages
457-70
Language
English
Region
Germany
NLM ID
0043312
Subset
IM
External Links
PubMed source DOI: 10.1007/BF00237348 View journal details
Analysis Services
Analysis Services

Contact

No. 2 Wenbo Road, Zhangqiu District, Jinan, Shandong

Qilu Normal University · Genelibs Bioinformatics Lab

750 Shunhua Rd, Jinan

2F, Bldg F, University Science Park

Tel: 0531-88819269

WeChat Official Account

Follow our WeChat subscription account for real-time updates and the latest in medical and biological research.


Business Email

E-mail: product@genelibs.com

Copyright © 2026.Genelibs Jinan Honghui Biotechnology Co., Ltd. 鲁ICP备20007159号-2