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3.7 Syntonics Syntonics (optometric phototherapy), utilized clinically for over sixty years, is that branch of ocular science dealing with the application of selected visible light frequencies through the eyes. Numerous ailments ranging from physical ailments to mental and emotional issues are treated using this method treatment. The primary area that is involved in Syntonics is the Nervous and Endocrine systems. Therefore a brief discussion of these systems would aid in the understanding of this particular therapy. 3.7.1 Nervous and Endocrine System: Definition The Nervous System consists of a network of nerve cells and nerve fibres that conveys sensations to the brain and motor impulses to organs and muscles. All that is seen, felt, tasted, smelt and heard is conveyed to the brain via sensory nerve pathways. The information is then processed by either the brain (for storage and thinking processes) or the spinal cord (reflexive and immediate reactions) and then messages are sent out via motor nerve pathways to stimulate organs and muscles to respond accordingly (Guyton & Hall, 1997). The Endocrine System is a body control system composed of a group of glands that maintain a stable internal environment by producing chemical regulatory substances called hormones. This system includes the pituitary gland, parathyroid glands, adrenal glands, pancreas, thymus gland, pineal gland, ovaries, and testes. Glands that manufacture and secrete hormones are called endocrine glands. The hormones they secrete are like ‘messengers’ that, when released into the blood, travel to distant tissues and organs to elicit specific functions necessary for the organism (Farabee, 2001). 3.7.1.1 The Basic Structure and Function of the Nervous and Endocrine Systems The nervous system includes all the nerve tissue throughout the human body. Two major anatomical subdivisions of this system are the Central Nervous System (or CNS) which comprises the Brain and Spinal Cord and the Peripheral Nervous System (or PNS) comprising all the nerves that appear externally to the brain and spinal cord. The CNS is responsible for integrating, processing, and coordinating sensory data and motor commands. Sensory data conveys information about conditions inside and outside the body. Motor commands control our muscular movements and glandular function. The CNS also controls our balance. It is the source of the higher functions of the brain such as intelligence, memory, learning, and emotion. 63PDF Image | THE USE OF LIGHT AND COLOUR AS A HEALING MODALITY
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