Letter | Published:

Evoked Single Cortical Unit Activity in the Primary Cortical Receiving Areas

Nature volume 169, pages 970971 (07 June 1952) | Download Citation

Subjects

Abstract

RENSHAW et al.1 analysed single cortical cell activity in the hippocampus by means of a micropipette electrode. Since 1951, the technique has been used by us for isolating peripherally evoked single cortical unit activity in the primary somatosensory, auditory and visual receiving areas of the cat and the monkey. Either barbiturate (dial or nembutal), chloralose or magnesium sulphate anæsthesia was used. The preparation was frequently paralysed with d-tubocurarine or B-erythroidine. The micro-electrodes used were either nichrome wire sharpened to a tip diameter of 6‐10 µ and insulated to the tip, or glass micropipettes, drawn to a tip diameter of 4–12 µ The latter were filled with 3 M potassium chloride to reduce their resistance2 and led into a cathode follower input. Action potentials were conventionally amplified (both r.c. and d.c. coupling) and displayed on twin-beam cathode-ray oscilloscopes. The cortex was fixed in 10 per cent formalin, sectioned at 50 microns and stained with thionin for identification of electrode tracks.

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.

    , , and , J. Neurophysiol., 3, 74 (1940).

  2. 2.

    , and , J. Cell. and Comp. Physiol., 35, 39 (1950).

  3. 3.

    , Nature, 169, 240 (1952).

  4. 4.

    , J. Neurophysiol., 5, 435 (1942).

  5. 5.

    , J. Neurophysiol., 9, 191 (1946).

Download references

Author information

Affiliations

  1. Dept. of Physiology and Biophysics,

    • V. E. AMASSIAN
  2. Division of Neurosurgery, University of Washington School of Medicine, Seattle 5, Washington. March 31.

    • L. B. THOMAS

Authors

  1. Search for V. E. AMASSIAN in:

  2. Search for L. B. THOMAS in:

About this article

Publication history

Published

DOI

https://doi.org/10.1038/169970b0

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.