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    The Machinery of the Mind: Premium Ebook
    The Machinery of the Mind: Premium Ebook
    The Machinery of the Mind: Premium Ebook
    Ebook69 pages59 minutes

    The Machinery of the Mind: Premium Ebook

    By Dion Fortune

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    About this ebook

    ORIGINALLY given as a popular lecture course, this little book does not pretend to be a contribution to the formidable array of psychological literature. It is intended for those who have neither the time nor the training necessary to assimilate the standard works on the subject, but who want to know its elements and to understand the principles on which our characters are formed and the means by which the process of thought is carried on, not so much from the scholastic point of view, but in relation to the problems of everyday life.
    LanguageEnglish
    PublisherAlicia Editions
    Release dateJun 3, 2021
    ISBN9782357288355
    The Machinery of the Mind: Premium Ebook

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      Book preview

      The Machinery of the Mind - Dion Fortune

      character.

      The Physical Vehicle Of Consciousness

      In order to arrive at an adequate understanding of mental processes it is necessary to have some idea of the machinery whereby the mind makes contact with the body.

      Throughout every inch of our organism is a network of specialised fibres whose function it is to carry nervous impulses from the sense organs to the central nervous system of brain and spinal cord, and from thence out again to the muscles, glands, and other organs of reaction. The sense organs act as receivers of sensation, the nerve fibres as transmitters, the central nervous system as a general telephone exchange, and the muscles, glands and organs as the executers of the impulses of the mind.

      Sense organs consist of cells, or sets of cells, specialised for the reception of particular kinds of impressions. That is to say, if the particular kind of stimulus they are fitted to receive is administered to them, a change, probably of a chemical type, takes place in their substance, which, it is thought, gives rise to energy of an electrical nature, which runs along the nerve fibre as along a wire. At the present moment, however, our knowledge of the nature of the nervous impulse is tentative and hypothetical.

      Like all other living tissue, the nervous system is built up of millions of specialised cells. These cells consist of a main cell body with prolongations, usually two in number. One of these has a mass of branching fibres like the root of a plant, and is called the DENDRITE. The other consists of a long thread, the end of which is frayed out into strands as the end of a piece of worsted may be unravelled. This process is called the AXON.

      The thread-like branches of the axon of one cell interlace with these of the dendrite of another cell and a nervous impulse, running down the nerve fibres, jumps the gap in the same way as the electric current jumps the space between the terminals of an arc lamp.

      It will readily be seen that these interlacing fibrils, millions in number, ramifying throughout every portion of the body, form a most wonderful system of communication; the brain and spinal cord acting as a central telephone exchange.

      Muscles are composed of long, spindle-shaped cells which are capable of contraction. Chemical changes are constantly going on in their substance. The blood and lymph which bathe them bring food materials and carry away the waste products of their activity.

      These food substances, which are highly organised chemical compounds, are stored in the body of the cell. When a nervous impulse is received, these food globules, as it were, explode; that is to say, they break down into their component chemical parts, and the energy which went to build them up is set free in the process and performs the work for which the muscle is designed.

      The glands are the chemists of the body, and in the crucibles of their minute cells carry out the living chemistry upon which our vital functions are based. The glands are the regulator of every process of the body.

      The Evolution Of The Nervous System

      The easiest way to grasp the organisation of our complex nervous structure is to study its evolution from its humble beginnings in the simplest forms of life.

      In single-celled animalcule, the most primitive type of living creature, a single cell performs all the functions of life; it moves, breathes, assimilates, excretes and feels. With the development of multi-cellular organisms, however, different cells are given different work to do, and made to do that and nothing else.

      It then becomes necessary that co-ordination should be maintained between the sense organs that perceive the prey and the muscles that move to its capture, and for this purpose other cells are used to specialise in communication.

      Thus it will be seen that the functional unit of the nervous system is not the nerve cell, but what is called the SENSORY-MOTOR ARC, consisting of a nerve carrying the incoming sensation from a sense organ and making contact with another nerve which carries the outgoing impulse to a muscle or organ.

      When a multiplicity of muscles becomes available for movement, it is necessary to further link up the sensory-motor arc. So that other parts of the structure may be brought into play and the response not be confined to one muscle alone, nerve cells form loops upon the arcs, and loops upon the loops, with further intercommunications among themselves. The organisation becomes more and more elaborate, admits more and more complex reactions to stimuli, till finally the wonderful complications of the human brain are achieved.

      How An Idea Enters The Mind

      WHEN an impression is made on a sense organ, the sensation derived from it is telegraphed via the connecting nerve fibre to the brain, and there translated, by a process of which we know nothing, from a sensation to a

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