Letter | Published:

Specific long-lasting potentiation of synaptic transmission in hippocampal slices

Naturevolume 266pages736737 (1977) | Download Citation

Subjects

Abstract

SHORT bursts of tetanic stimulation (10–50 Hz for 10–15 s) give rise to long-lasting potentiation (LLP) of synaptic transmission in the intact hippocampal formation1 and in hippocampal slices2. The potentiation may last several hours. Because of the time course and the small number of conditioning impulses required, the process may have general interest as a model for long-term plasticity in the nervous system. Studies of the mechanisms underlying LLP have been hampered, however, by lack of control with the size of the input volley and of data on membrane potential changes of the participating cells. Further, it is not known whether the potentiation is specific for the tetanised input. Schwartzkroin and Wester2 found an unchanged antidromic field potential, and concluded that there were no general postsynaptic changes. Lynch et al.3, however, found a reduction in glutamate sensitivity during the potentiated stage, and suggested that a reduction in excitability had taken place. We report here experiments on transverse hippocampal slices4 of guinea pigs in which we have monitored the size of two independent afferent inputs, one of which is tetanised to produce LLP, leaving the other as a control line to check for non-specific changes in excitability. Furthermore, intracellular recordings support our suggestion that LLP is caused by a specific augmentation of transmitter release.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Bliss, T. V. P. & Lømo, T. J. Pkysiol. Lond. 232, 331–356 (1973).

  2. 2

    Schwartzkroin, P. A. & Wester, K. Brain Res. 89, 107–119 (1975).

  3. 3

    Lynch, G. S., Gribkoff, V. K. & Deadwyler, S. A. Nature 263, 151–153 (1976).

  4. 4

    Skrede, K. K. & Westgaard, R. H. Brain Res. 35, 589–593 (1971).

  5. 5

    Andersen, P., Bliss, T. V. P. & Skrede, K. K. Expl. Brain Res. 13, 208–221 (1971).

  6. 6

    Andersen, P., Silfvenius, H., Sundberg, S. H. & Sveen, O. J. Physiol. Lond. 263, 104–105P (1977).

Download references

Author information

Affiliations

  1. Institute of Neurophysiology, University of Oslo, Oslo, Norway

    • P. ANDERSEN
    • , S. H. SUNDBERG
    •  & O. SVEEN
  2. Department of Physiology, University of Göteborg, Göteborg, Sweden

    • H. WIGSTRÖM

Authors

  1. Search for P. ANDERSEN in:

  2. Search for S. H. SUNDBERG in:

  3. Search for O. SVEEN in:

  4. Search for H. WIGSTRÖM in:

About this article

Publication history

Received

Accepted

Issue Date

DOI

https://doi.org/10.1038/266736a0

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.