The initial heat production in garfish olfactory nerve fibres

Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character


A study has been made of the temperature changes associated with the passage of a single impulse in the non-myelinated fibres of the garfish olfactory nerve: and the time course of these temperature changes has been compared with the time course of the electrical events during the action potential. As in other non-myelinated nerves studied the observed temperature changes result from a biphasic initial heat production consisting of a transient evolution of heat (the positive heat) followed by a rapid heat reabsorption (referred to as the negative heat). There is no evidence of any additional phases of initial heat production. At 0 degrees C the measured positive initial heat is 224 mucal/g impulse (937 muJ/g impulse); and the corresponding negative initial heat is 230 mucal/g impulse (962 muJ/g impulse). The residual initial heat is very small, being about -6 mucal/g impulse (-25 muJ/g impulse). In the range 0-10 degrees C there is no significant effect of temperature on the magnitude of either the positive or the negative phases of heat production. The experimental thermal records were analysed to determine the true time course of the temperature changes in the nerve undistorted by the recording system. The time course of the ...Continue Reading


Feb 1, 1979·Proceedings of the National Academy of Sciences of the United States of America·D LichtshteinA J Blume
Jul 1, 1979·The Journal of Physiology·J V HOWARTH, J M RITCHIE
Jul 1, 1965·The Journal of Physiology·R D Keynes, J M RITCHIE
Feb 18, 1958·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·B C ABBOTTJ V HOWARTH
Jan 16, 1933·The Journal of Physiology·M Beresina, T P Feng


Sep 7, 1983·Journal of Theoretical Biology·R de A Nogueira, E A Conde Garcia
Mar 31, 2015·Nature Communications·Ahmed El Hady, Benjamin B Machta
Mar 22, 2007·Physics in Medicine and Biology·Denis Le Bihan
Mar 15, 2020·Physical Review. E·Aymar C L de LichterveldeMartin Z Bazant
Nov 1, 1985·Quarterly Reviews of Biophysics·J M RITCHIE, R D Keynes

Related Concepts

Nerve Impulses
Heat Loss
Fourier Transform
Hot Temperature
Olfactory Nerve

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Synthetic Genetic Array Analysis

Synthetic genetic arrays allow the systematic examination of genetic interactions. Here is the latest research focusing on synthetic genetic arrays and their analyses.

Congenital Hyperinsulinism

Congenital hyperinsulinism is caused by genetic mutations resulting in excess insulin secretion from beta cells of the pancreas. Here is the latest research.

Neural Activity: Imaging

Imaging of neural activity in vivo has developed rapidly recently with the advancement of fluorescence microscopy, including new applications using miniaturized microscopes (miniscopes). This feed follows the progress in this growing field.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Epigenetic Memory

Epigenetic memory refers to the heritable genetic changes that are not explained by the DNA sequence. Find the latest research on epigenetic memory here.

Cell Atlas of the Human Eye

Constructing a cell atlas of the human eye will require transcriptomic and histologic analysis over the lifespan. This understanding will aid in the study of development and disease. Find the latest research pertaining to the Cell Atlas of the Human Eye here.

Femoral Neoplasms

Femoral Neoplasms are bone tumors that arise in the femur. Discover the latest research on femoral neoplasms here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

© 2021 Meta ULC. All rights reserved