Nervous system acts like a communication network, connecting all parts of body. Nervous system, in general, regulates rapid muscular and secretory activities of body, whereas Hormonal system (endocrine glands) regulates mainly the slow reacting metabolic functions.

A nerve is a bundle of insulated fibers, with a thread like appearance, serving the purpose like a telephone cable.

There are two types of nerves, (1) Sensory nerves, which enable body to experience senses of pain, heat, smell, cold etc. (2) Motor nerves, which move the muscles.

The Central Nervous system consists of Brain and Spinal Cord. The Peripheral nervous, system consists of nerve, fibers, outside of brain and spinal cord.

Brain consists of two hemispheres. Left hemisphere controls the right half of body and the right hemisphere controls the left half of body. This cross over is important in that, it is a major exception to Zone theory. In Zone theory, right foot represents the right half of body and left foot represents the left half of body. But, disorders involving one side of brain will affect the opposite side of body. For example, the large toe on the opposite side of paralyzed limbs will be more sensitive.

Brain, is enclosed in a protective casing of the skull, it is the central computer controlling both, voluntary and involuntary systems of the body. 12 pairs of cranial nerves, arising from brain, pass through the holes in the skull. Some of them are sensory, but majority are motor nerves. Largest and most important among cranial nerves is called vagues nerve, supplying the heart, lungs, and abdominal organs.

Spinal cord
It is the continuation of brain below the skull. It is a column of nervous tissue, protected in the vertebral column, a tunnel in the backbone, consisting of vertebrae (small bones) piles upon one another. The nerves originating from spinal cord act as channels to convey information from the peripheral nerves and to the muscles and glands.

The spinal nerves are named and numbered according to segments of the length of spinal column, (1) Cervical (2) Thoracic (3) Lumbar (4) Sacral.

Spine, starting below the skull, has 7 cervical vertebrae. They control neck and arms. The 7th cervical is protruding vertebra at the base of the neck. It effects everything down into the finger tips.

From the 7th cervical down are 12 thoracic vertebrae, ending near the waist line. Thoracic portion provides nerves to chest, region.

From waist line begin the 5 lumbar vertebrae. They provide nerves to the lower extremities, of legs and feet. This is the lower back, having profound effect on organs in that region such as reproductive organs, digestive tract and lower limbs.

Below the lumbar vertebrae are 5 fused sacral vertebrae, forming the sacrum and tail bone (coccyx). They supply nerves to organs of pelvis, the pelvic and buttock muscles. This area can affect many other parts, including head, when headaches occur.

Brain, Eyes, Ears, Sinus, several sense organs, inlets for air and food, are accommodated in the head.

Sciatic nerve is the largest nerve cord, about ¾ inch wide and is the continuation of the lower part of sacral plexus. It descends along back of thigh to about its lower third, and then divides into 2 large branches going down along the sides of legs upto the heels.

Cause of sciatica pain can be inflammation of sciatic nerve, some misplacement along lumbar region, enlarged prostate, or injury to any other part of body affecting sciatic nerve.

Solar Plexus
It is a network of nerves sometimes called the “Abdominal Brain”, located behind the stomach in the center of body. It goes out to all parts of abdominal cavity.

For releasing Tension and relaxing the body, reflex of Solar Plexus plays an important role.

Every part of body is controlled by nerves and everyone of these nerves connects directly or indirectly with the spine.

I : Names and Vertebrae and nerves in the spine.
II : The areas receiving nerve fibres from these nerves.
III : Some of the conditions that can follow a pressure on or interference with nerves.

C-1 Blood supply to head,Pituitary gland, Scalp, Bones of face, Brain itself, Inner and Middle ear, symphathetic nervous system. Headache Nervousness,InsomniaHead colds, High Blood pressure, Migrain, Mental conditions, Amnesia, Epilepsy, Infantile paralysis, Chronic tiredness Vertigo, St. Vitus dance.
C-2 Eyes, Optic nerve, Auditory nerve, Sinuses, Mastoid bones, Tongue, forehead. Sinus troubles, Allergies, Crossed eyes, Deafness, Erysipeals, Eye troubles, Ear ache, fainting, Certain cases of blindness.
C-3 Cheeks, Outer Ear, Face bones, Teeth, Tri-facial nerve. Neuralgis, Neuritis, Acne or Pimples, Eczema.
C-4 Nose,Lips,Mouth,Eustachian tube. Hay fever, Rose fever, Catarrh, Hard of hearing, Adenoids.
C-5 Vocal cords, Neck glands, pharynx. Laryngitis, Hoarseness, Throat, conditions like sore throat, quinsy etc.
C-6 Neck muscles, shoulders, Tonsils. Stiff neck, pain in upper arm, tonsillitis, Whooping cough, Croup.
C-7 Thyroid gland, Bursa in shoulder, Elbows. Bursitis, Colds, Thyroid conditions Goiter.

T-1 Arms from the elbows down including hand wrists and fingers, Esophagus, Trachea. Asthma, Cough, Difficult breathing Shortness of breath, Pain in lower arm and hands.
T-2 Heart including valves, and covering, Coronary arteries. Functional heart conditions, certain chest pains.
T-3 Lungs, bronchial tube, Pleura, Chest, Breast, Nipples. Bronchitis, Pleyrisy, pneumonia, Congestin, Influenza, Grippe.
T-4 Gall Bladder, Common duct. Gall bladder conditions, Jaundice, Shingles.
T-5 Liver, Solar plexus, Blood. Liver conditions, Fevers, Low blood pressure, Anemia, Poor circulation, Arthritis.
T-6 Stomach Stomach troubles, including nervous stomach, Indigestion, Heart burns, Dyspepsia.
T-7 Pancreas, Islands of langerhans, Duodenum. Diabetes, Ulcers, Gastritis.
T-8 Spleen, Diaphragm. Leukemia, Hiccoughs.
T-9 Adrenals, or Suprarenals. Allergies, Hives.
T-10 Kidneys Kidney troubles, Hardening of arteries, Chronic tiredness, Nephritis, Pyelitis.
T-11 Kidneys, Ureters. Skin conditions, like acne, or pimples, Eczema, Boils etc., Autointoxication.
T-12 Small intestines, Fallopian tubes, Lymph circulation. Rheumatism, Gas pains, Certain types of sterility.

L-1 Large intestine or colon, Inguinal rings. Constipation, Colitis, Dysentery, Diarrhea, Ruptures or Hernias.
L-2 Appendix, Abdomen, Upper leg, Caecum. Appendicitis, Cramps, Difficult Breathing, Acidosis, Varicose veins.
L-3 Sex organs, Ovaries, Testicles, Uterus, Bladder, Knee. Bladder troubles, Menstrual troubles, like painful or irregular periods, Miscarriages, Bed wetting, Impotency, Change of life symptoms, Knee pains.
L-4 Prostrate gland, Muscles of lower back, Sciatic nerve. Sciatica, Lumbago, Urine troubles, Back-ache.
L-5 Lower legs, Ankle, Feet, Toes, Arches. Poor circulation in legs, Swollen ankles, Weak ankles, and arches, Cold feet, Weakness in legs, leg cramps.
Sacrum Hip bones, Buttocks. Sacro-iliac conditions, spinal curvatures.
Coccyx Rectum, Anus. Hemorrhoids, or piles, Pruritus or itching, Pain at the end of spine on sitting.

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