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. 1966 Jan;182(1):164–184. doi: 10.1113/jphysiol.1966.sp007816

Short-latency projections to the cat cerebral cortex from skin and muscle afferents in the contralateral forelimb

O Oscarsson, I Rosén
PMCID: PMC1357463  PMID: 5937410

Abstract

1. The potentials evoked in the first sensorimotor area on stimulation of muscle and skin nerves in the contralateral forelimb were recorded in preparations with either the dorsal funiculus (DF) or the spinocervical tract (SCT) interrupted.

2. The short-latency, surface-positive potentials in these preparations are mediated by the remaining path, either the DF or SCT.

3. Cutaneous afferents project through both paths to two discrete areas which correspond to the classical sensory and motor cortices (Fig. 10 A and B). The projection areas are not identical: the DF path seems to activate most effectively the sensory cortex; and the SCT path, most effectively the motor cortex.

4. The potentials evoked from cutaneous nerves have a similar latency in the two areas. On stimulation of the superficial radial nerve the latency was about 4·5 msec in preparations with intact DF, and about 5·3 msec in preparations with intact SCT.

5. High threshold muscle afferents project to the same areas as the cutaneous afferents.

6. Group I muscle afferents project, exclusively through the DF path, to an area distinct from the two cutaneous projection areas (Fig. 10C). It occupies a caudal part of the motor cortex and an intermediate zone between the sensory and motor cortices.

7. The projection areas are compared with the recent cytoarchitectonic map of Hassler & Muhs-Clement (1964) (Fig. 10D).

8. It is suggested that the afferent projections to the motor cortex and the intermediate zone are used in the integration of movements elicited from the cortex. The general similarity in the organization of afferent paths to the motor cortex and the cerebellum is pointed out.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. AMASSIAN V. E. Fiber groups and spinal pathways of cortically represented visceral afferents. J Neurophysiol. 1951 Nov;14(6):445–460. doi: 10.1152/jn.1951.14.6.445. [DOI] [PubMed] [Google Scholar]
  2. Adrian E. D. Afferent discharges to the cerebral cortex from peripheral sense organs. J Physiol. 1941 Sep 8;100(2):159–191. doi: 10.1113/jphysiol.1941.sp003932. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. BISHOP G. H., SMITH J. M. THE SIZE OF NERVE FIBERS SUPPLYING CEREBRAL CORTEX. Exp Neurol. 1964 Jun;9:483–501. doi: 10.1016/0014-4886(64)90056-1. [DOI] [PubMed] [Google Scholar]
  4. CARPENTER D., ENGBERG I., LUNDBERG A. DIFFERENTIAL SUPRASPINAL CONTROL OF INHIBITORY AND EXCITATORY ACTIONS FROM THE FRA TO ASCENDING SPINAL PATHWAYS. Acta Physiol Scand. 1965 Jan-Feb;63:103–110. doi: 10.1111/j.1748-1716.1965.tb04047.x. [DOI] [PubMed] [Google Scholar]
  5. CELESIA G. G. Segmental organization of cortical afferent areas in the cat. J Neurophysiol. 1963 Mar;26:193–206. doi: 10.1152/jn.1963.26.2.193. [DOI] [PubMed] [Google Scholar]
  6. GIAQUINTO S., POMPEIANO O., SWETT J. E. EEG AND BEHAVIORAL EFFECTS OF FORE-AND HINDLIMB MUSCULAR AFFERENT VOLLEYS IN UNRESTRAINED CATS. Arch Ital Biol. 1963 Apr 2;101:133–148. [PubMed] [Google Scholar]
  7. HASSLER R. Die zentralen Apparate der Wendebewegungen. II. Die neuronalen Apparate der vestibulären Korrekturwendungen und der Adversivbewegungen. Arch Psychiatr Nervenkr Z Gesamte Neurol Psychiatr. 1956;194(5):481–516. [PubMed] [Google Scholar]
  8. HASSLER R., MUHS-CLEMENT K. ARCHITEKTONISCHER AUFBAU DES SENSOMOTORISCHEN UND PARIETALEN CORTEX DE KATZE. J Hirnforsch. 1964;7:377–420. [PubMed] [Google Scholar]
  9. HOLMQVIST B., OSCARSSON O. Location, course, and characteristics of uncrossed and crossed ascending spinal tracts in the cat. Acta Physiol Scand. 1963 May;58:57–67. doi: 10.1111/j.1748-1716.1963.tb02628.x. [DOI] [PubMed] [Google Scholar]
  10. HOLMQVIST B., OSCARSSON O., UDDENBERG N. Organization of ascending spinal tracts activated from forelimb afferents in the cat. Acta Physiol Scand. 1963 May;58:68–76. doi: 10.1111/j.1748-1716.1963.tb02629.x. [DOI] [PubMed] [Google Scholar]
  11. KENNEDY T. T., TOWE A. L. Identification of a fast lemniscocortical system in the cat. J Physiol. 1962 Mar;160:535–547. doi: 10.1113/jphysiol.1962.sp006864. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. LIVINGSTON A., PHILLIPS C. G. Maps and thresholds for the sensorimotor cortex of the cat. Q J Exp Physiol Cogn Med Sci. 1957 Apr;42(2):190–205. doi: 10.1113/expphysiol.1957.sp001250. [DOI] [PubMed] [Google Scholar]
  13. LUNDBERG A. ASCENDING SPINAL HINDLIMB PATHWAYS IN THE CAT. Prog Brain Res. 1964;12:135–163. doi: 10.1016/s0079-6123(08)60621-4. [DOI] [PubMed] [Google Scholar]
  14. LUNDBERG A., NORRSELL U., VOORHOEVE P. EFFECTS FROM THE SENSORIMOTOR CORTEX ON ASCENDING SPINAL PATHWAYS. Acta Physiol Scand. 1963 Dec;59:462–473. doi: 10.1111/j.1748-1716.1963.tb02762.x. [DOI] [PubMed] [Google Scholar]
  15. LUNDBERG A., OSCARSSON O. Functional organization of the dorsal spino-cerebellar tract in the cat. VII. Identification of units by antidromic activation from the cerebellar cortex with recognition of five functional subdivisions. Acta Physiol Scand. 1960 Dec 30;50:356–374. doi: 10.1111/j.1748-1716.1960.tb00189.x. [DOI] [PubMed] [Google Scholar]
  16. LUNDBERG A., OSCARSSON O. Functional organization of the ventral spino-cerebellar tract in the cat. IV. Identification of units by antidromic activation from the cerebellar cortex. Acta Physiol Scand. 1962 Mar-Apr;54:252–269. doi: 10.1111/j.1748-1716.1962.tb02350.x. [DOI] [PubMed] [Google Scholar]
  17. LUNDBERG A., OSCARSSON O. Three ascending spinal pathways in the dorsal part of the lateral funiculus. Acta Physiol Scand. 1961 Jan;51:1–16. doi: 10.1111/j.1748-1716.1961.tb02108.x. [DOI] [PubMed] [Google Scholar]
  18. LUNDBERG A., OSCARSSON O. Two ascending spinal pathways in the ventral part of the cord. Acta Physiol Scand. 1962 Mar-Apr;54:270–286. doi: 10.1111/j.1748-1716.1962.tb02351.x. [DOI] [PubMed] [Google Scholar]
  19. MALIS L. I., PRIBRAM K. H., KRUGER L. Action potentials in motor cortex evoked by peripheral nerve stimulation. J Neurophysiol. 1953 Mar;16(2):161–167. doi: 10.1152/jn.1953.16.2.161. [DOI] [PubMed] [Google Scholar]
  20. MALLART A. PROJECTION DES AFF'ERENCES MUSCULAIRES DE LA PATTE ANT'ERIEURE AU NIVEAU DE THALAMUS CHEZ LE CHAT. C R Hebd Seances Acad Sci. 1964 Aug 3;259:1215–1218. [PubMed] [Google Scholar]
  21. MARK R. F., STEINER J. Cortical projection of impulses in myelinated cutaneous afferent nerve fibres of the cat. J Physiol. 1958 Aug 6;142(3):544–562. doi: 10.1113/jphysiol.1958.sp006035. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. MORIN F. A new spinal pathway for cutaneous impulses. Am J Physiol. 1955 Nov;183(2):245–252. doi: 10.1152/ajplegacy.1955.183.2.245. [DOI] [PubMed] [Google Scholar]
  23. MORIN F., CATALANO J. V. Central connections of a cervical nucleus (nucleus cervicalis lateralis of the cat). J Comp Neurol. 1955 Aug;103(1):17–32. doi: 10.1002/cne.901030104. [DOI] [PubMed] [Google Scholar]
  24. MORSE R. W., TOWE A. L. THE DUAL NATURE OF THE LEMNISCO-CORTICAL AFFERENT SYSTEM IN THE CAT. J Physiol. 1964 Jun;171:231–246. doi: 10.1113/jphysiol.1964.sp007374. [DOI] [PMC free article] [PubMed] [Google Scholar]
  25. MOUNTCASTLE V. B. Modality and topographic properties of single neurons of cat's somatic sensory cortex. J Neurophysiol. 1957 Jul;20(4):408–434. doi: 10.1152/jn.1957.20.4.408. [DOI] [PubMed] [Google Scholar]
  26. MOUNTCASTLE V. B., POWELL T. P. Central nervous mechanisms subserving position sense and kinesthesis. Bull Johns Hopkins Hosp. 1959 Oct;105:173–200. [PubMed] [Google Scholar]
  27. NORRSELL U., VOORHOEVE P. Tactile pathways from the hindlimb to the cerebral cortex in cat. Acta Physiol Scand. 1962 Jan;54:9–17. doi: 10.1111/j.1748-1716.1962.tb02324.x. [DOI] [PubMed] [Google Scholar]
  28. OSCARSSON O. FUNCTIONAL ORGANIZATION OF THE SPINO- AND CUNEOCEREBELLAR TRACTS. Physiol Rev. 1965 Jul;45:495–522. doi: 10.1152/physrev.1965.45.3.495. [DOI] [PubMed] [Google Scholar]
  29. OSCARSSON O., ROSEN I. PROJECTION TO CEREBRAL CORTEX OF LARGE MUSCLE-SPINDLE AFFERENTS IN FORELIMB NERVES OF THE CAT. J Physiol. 1963 Dec;169:924–945. doi: 10.1113/jphysiol.1963.sp007305. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. OSWALDO-CRUZ E., TSOULADZE S. Activité évoquée par stimulation de nerfs d'origine musculaire ou cutanée, dans le gyrus sigmoïde antérieur du chat. J Physiol (Paris) 1957 Jan-Mar;49(1):327–329. [PubMed] [Google Scholar]
  31. PERL E. R., WHITLOCK D. G. Potentials evoked in cerebral somatosensory region. J Neurophysiol. 1955 Sep;18(5):486–501. doi: 10.1152/jn.1955.18.5.486. [DOI] [PubMed] [Google Scholar]
  32. POWELL T. P., MOUNTCASTLE V. B. Some aspects of the functional organization of the cortex of the postcentral gyrus of the monkey: a correlation of findings obtained in a single unit analysis with cytoarchitecture. Bull Johns Hopkins Hosp. 1959 Sep;105:133–162. [PubMed] [Google Scholar]
  33. SWETT J. E., BOURASSA C. M., INOUE S. EFFECTS OF CUTANEOUS AND MUSCLE SENSORY NERVE VOLLEYS IN AWAKE CATS: A STUDY IN PERCEPTION. Science. 1964 Sep 4;145(3636):1071–1073. [PubMed] [Google Scholar]
  34. WELKER W. I., CAMPOS G. B. Physiological significance of sulci in somatic sensory cerebral cortex in mammals of the family procyonidae. J Comp Neurol. 1963 Feb;120:19–36. doi: 10.1002/cne.901200103. [DOI] [PubMed] [Google Scholar]

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