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Somatic receptive-field properties of single fibres in the rostral portion of the corpus callosum in awake cats

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Summary

In fifteen awake, chronic cats single-unit recordings were obtained from 316 fibres isolated in the rostral portion of the corpus callosum (CC). Altogether, 304 units were reactive to peripheral stimuli. They were fired by hair bending, light touch or light pressure (S units; 79.3%) or by gentle rotation of joints and/or by pressure on muscle bellies or tendons (D units; 20.7%). All the reactive units were endowed with small and unilateral receptive fields (RFs) located in trigeminal (49.7%) or segmentai (50.3%) regions. Trigeminal and forepaw units had the smallest RFs. All the trigeminal units were of the S type. Their RFs were located in either the ophthalmic, maxillar, and mandibular face districts or in the oral vestible. The vast majority of segmental units (146 out 153 fibres) had RFs in the forelimb. Very few units were fired by stimulation of the trunk (6 fibres), and only one had its RF in the tail. Almost half of the forelimb units (69 fibres) were fired by stimulation of the most proximal parts of the forelimb and of the shoulder; about one third (57 fibres) exhibited RFs located in the forepaw; the remaining units (20 fibres) had their RFs in the intermediate region of the forelimb. Neither the trigeminal nor segmental RFs ever extended across the midline. The distribution of the fibres within the CC conformed to a somatotopic pattern. The representations of the trigeminal and segmental regions were largely coextensive. Along the rostro-caudal axis of the CC, units with RFs in the mandibular, maxillar and ophthalmic divisions of the trigeminal region tended to lie in this order in the rostralmost 4 mm. Segmental representation extended over the rostralmost 6 mm. Shoulder fibres were mainly found in the rostral half, whereas forepaw units were segregated in the caudal half.

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References

  1. Albé-Fessard D, Besson JM (1973) Convergent thalamic and cortical projections. The nonspecific system. In: Iggo A (ed) Somatosensory system. Springer, Berlin (Handbook of sensory physiology, pp 489–560)

  2. Berlucchi G (1972) Anatomical and physiological aspects of visual functions of corpus callosum. Brain Res 37: 371–392

  3. Berlucchi G, Gazzaniga SM, Rizzolatti G (1967) Microelectrode analysis of transfer of visual information by the corpus callosum. Arch Ital Biol 105: 583–596

  4. Caminiti R, Innocenti GM, Manzoni T (1979) The anatomical substrate of callosal messages from SI and SII in the cat. Exp Brain Res 35: 295–314

  5. Caminiti R, Manzoni T, Michelini S, Spidalieri G (1976) Callosal transfer of impulses originating from superficial and deep nerves of the cat forelimb. Arch Ital Biol 114: 155–177

  6. Ebner FF, Myers RE (1965) Distribution of corpus callosum and anterior commissure in cat and raccoon. J Comp Neurol 124: 353–366

  7. Hubel DH, Wiesel TN (1967) Cortical and callosal connections concerned with the vertical meridian of visual field in the cat. J Neurophysiol 30: 1561–1573

  8. Innocenti GM, Fiore L (1976) Morphological correlates of visual field transformation in the corpus callosum. Neurosci Lett 2: 245–252

  9. Innocenti GM, Manzoni T, Spidalieri G (1972) Peripheral and transcallosal reactivity of neurones within SI and SII cortical areas. Segmental divisions. Arch Ital Biol 110: 415–443

  10. Innocenti GM, Manzoni T, Spidalieri G (1973) Relevance of the callosal transfer in defining the peripheral reactivity of somesthetic cortical neurones. Arch Ital Biol 111: 187–221

  11. Innocenti GM, Manzoni T, Spidalieri G (1974) Patterns of the somesthetic messages transferred through the corpus callosum. Exp Brain Res 19: 447–466

  12. Jenny AB (1979) Commissural projections of the cortical hand motor area in the monkeys. J Comp Neurol 188: 137–146

  13. Jones EG, Coulter JD, Wise SP (1979) Commissural columns in the sensory-motor cortex of monkeys. J Comp Neurol 188: 113–136

  14. Jones EG, Powell TPS (1968) The commissural connections of the somatic sensory cortex in the cat. J Anat (Lond) 103: 433–455

  15. Kawamura K, Otani K (1970) Corticocortical fiber connections in the cat cerebrum: The frontal region. J Comp Neurol 139: 423–448

  16. Klüver H, Barrera E (1953) A method for the combined staining of cells and fibers in the nervous system. J Neuropathol Exp Neurol 12: 400–403

  17. Lamarre Y, Joffroy AJ, Filion M, Bouchoux R (1970) A stereotaxic method for repeated sessions of central unit recording in the paralysed or moving animal. Rev Can Biol 29: 371–376

  18. Lepore F, Prévost L, Richer L, Guillemot JP (1983) Interhemispheric transfer of somesthetic information in the corpus callosum. Soc Neurosci Abstr 9, Part 1: 250

  19. Luttemberg J, Marsala J (1963) Localization of commissural fibers in the corpus callosum in the cat's brain. Czech J Morphol 11: 166–176

  20. Manzoni T, Barbaresi P, Bellardinelli E, Caminiti R (1980) Callosal projections from the two body midlines. Exp Brain Res 39: 1–9

  21. Manzoni T, Barbaresi P, Conti F (1984) Callosal mechanisms for the interhemispheric transfer of hand somatosensory information in the monkey. Behav Brain Res 11: 155–170

  22. Manzoni T, Spidalieri G, Caminiti R (1979) Cutaneous and proprioceptive input to the corpus callosum in the cat. In: Steele Russell I, van Hoff MW, Berlucchi G (eds) Structure and function of cerebral commissures. MacMillan Press, London, pp 310–318

  23. Mountcastle VB (1957) Modality and topographic properties of single neurons of cat's somatic sensory cortex. J Neurophysiol 20: 408–434

  24. Mountcastle VB (1980) Neural mechanisms in somesthesis. In: Mountcastle VB (ed) Medical Physiology, Vol I. Mosby, St. Louis, pp 348–390

  25. Pandya DN, Gold D, Berger T (1969) Interhemispheric connections in the precentral motor cortex in the rhesus monkey. Brain Res 15: 594–596

  26. Pandya DN, Karol EA, Heilbronn P (1971) The topographical distribution of interhemispheric projections in the corpus callosum of the rhesus monkey. Brain Res 32: 31–43

  27. Pandya DN, Vignolo LA (1969) Interhemispheric projections of the parietal lobe in the rhesus monkey. Brain Res 15: 49–65

  28. Pappas CL, Strick PL (1981) Anatomical demonstration of multiple representation in the forelimb region of the cat motor cortex. J Comp Neurol 200: 491–500

  29. Robinson DL (1973) Electrophysiological analysis of interhemispheric relations in the second somatosensory cortex of the cat. Exp Brain Res 18: 131–144

  30. Snider RS, Niemer WT (1961) A stereotaxic atlas of the cat brain. University of Chicago Press, Chicago

  31. Spidalieri G, Guandalini P (1983) Motor representation in the rostral portion of the cat corpus callosum as evidenced by microstimulation. Exp Brain Res 53: 59–70

  32. Teitelbaum H, Sharpless SK, Byck R (1968) Role of somatosensory cortex in interhemispheric transfer of tactile habits. J Comp Physiol Psychol 66: 623–632

  33. Welt C, Aschoff J, Kameda K, Brooks VB (1967) Intracortical organization of cat's sensory motor neurons. In: Purpura DP, Yahr MD (eds) Symposium on neurophysiological basis of normal and abnormal motor activities. Raven Press-Hewlett, New York, pp 255–293

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Author information

Correspondence to G. Spidalieri.

Additional information

Supported by grants from the National Research Council (C.N.R.) of Italy and from Italian Ministero della Pubblica Istruzione

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Spidalieri, G., Franchi, G. & Guandalini, P. Somatic receptive-field properties of single fibres in the rostral portion of the corpus callosum in awake cats. Exp Brain Res 58, 75–81 (1985). https://doi.org/10.1007/BF00238955

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Key words

  • Corpus callosum
  • Single fibres
  • Somatic receptive fields
  • Awake cats