Bodily changes in pain, hunger, fear, and rage : an account of recent researches into the function of emotional excitement / by Walter B. Cannon.

  • Cannon, Walter B. (Walter Bradford), 1871-1945.
Date:
1929
Catalogue details

Licence: In copyright

Credit: Bodily changes in pain, hunger, fear, and rage : an account of recent researches into the function of emotional excitement / by Walter B. Cannon. Source: Wellcome Collection.

    44/432 (page 22)
    The outlying neurones typically have their cell bodies grouped in ganglia (G’s, Fig. 1) which in the trunk region lie along either side of the spinal cord and in the head region and in the pelvic part of the abdominal cavity are disposed near the organs which the neurones supply. In some instances these neurones lie wholly within the structure which they innervate (see e. g., the heart and the stomach, Fig. 1). In other instances the fibers passing out from the ganglia—the so-called “postganglionic fibers”—may traverse long distances before reaching their destination. The in¬ nervation of blood vessels in the foot by neurones whose cell bodies are in the lower trunk region is an example of this extensive distribution of the fibers. THE THREE DIVISIONS OF THE OUTLYING NEURONES As suggested above, the outlying neurones are con¬ nected with the brain and spinal cord by neurones whose cell bodies lie within the central nervous organs. These connecting neurones, represented by continuous lines in Fig. 1, do not pass out in an uninterrupted series all along the cerebrospinal axis. Where the nerves pass out from the spinal cord to the fore and hind limbs, fibers are not given off to the ganglia. Thus these connecting or “preganglionic” fibers are separated into three divisions. In front of the nerve roots for the fore limbs is the head or cranial division ; for the more slowly acting peripheral structures and transform the submaximal impulses into maximal.