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| a malignant tumor made up of undifferentiated nerve cells. |
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| a medical specialist who studies the nervous system, its functions and its disorders. |
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| Any disease of the nervous tissue. |
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| scientific study of the effects of drugs on the nervous system. |
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| A substance that is poisonous or destructive to nervous tissue, e.g. botulism toxin, lead. |
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| A viral infection of the nervous system, transferred to humans by the bites of infected animals, which causes brain inflammation, delirium and death. |
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| a procedure in which a nerve tract in the spinal cord is served surgically , usually in order to relieve unremitting pain. |
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| Any disease or disorder of the brain. |
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| Functional Brain Disorder |
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Definition
| Psychological disorders for which no structural cause can be found and includes neuroses and psychoses. |
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Definition
| Congential condition involving the formation of a small brain. Most children with this condition are retarded. |
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Definition
| Inflammation of the spinal cord. |
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Definition
| X-ray of the spinal cord after the injection of a contrasting medium. |
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Definition
| Functional brain disorders where the affected individual retains contact with reality. This includes panic attacks, irrational fears (phobia) and compulsive-obsessive behaviors. |
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Definition
| Functional brain disorders where the affected individuals detach themselves from reality and exhibit bizarre behaviors. Legally this is termed insanity and includes schizophrenia, depression and manic-depression. |
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| Sharp spasmlike pain along the course of one or more nerves, usually caused by inflammation or injury of the nerve(s). |
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| An abnormal burning or tingling sensation due to a disorder of a sensory nerve. |
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| A viral inflammation , caused by the chickenpox virus, which affects the dorsal roots of the spinal nerves, causing pain and a characteristic rash. |
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Definition
| A condition in which the esophagus and the sphincter at the esophagus-stomach junction do not relax with swallowing. This makes it difficult for food to enter the stomach and leads to vomitting. |
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Definition
| A condition in which the urinary bladder becomes flaccid and overfills, allowing urine to dribble through the sphincters. |
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Definition
| Cutting or severing of the vagus nerve. This is often done to reduce the secretion of stomach acid for individuals that suffer from gastrointestinal ulcers. |
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Definition
| Reduced ability to feel pain without a loss of consciousness. |
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| Loss of the voluntary ability to perform skilled motor activites. |
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Definition
| Disorders in the motor pathways resulting in weakness, uncoordinated motion and characteristic speech disturbances. |
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Definition
| Impairment of muscle tone. |
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Definition
| A condition in which affected individuals sleeps as much as 15 hours daily. |
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Definition
| sudden contraction of a muscle or muscle part usually involving the muscles of the limbs. this can occur normally in people as they fall asleep or can be due to diseases of the reticular formation and/or cerebellum. |
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| A phenomenon in which amputees have chronic pain in their nonexistant (amputated) limb. |
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Definition
| Inflammation of the margins of the eyelids. |
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Definition
| Surgical removl of an eyeball. |
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Definition
| Anteriorly bulging eyeballs, commom in cases of hyperthyroidism. |
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Definition
| The science that studies the eye and eye diseases. |
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Definition
| A licensed nonphysician who measures vision and prescribes corrective lenses. |
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Definition
| Inflammation and infection of the external auditory canal, caused by bacteria or fungi that enter the canal from the outside. Often occurs after the canal gets moistened by swimming. |
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Definition
| The science that studies the ear, nose and throat and diseases of these areas. |
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Definition
| nipplelike protrusion of the ptic disk into the eyeball which can be caused by increased intracranial pressure. |
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Definition
| A blind spot other than the normal blind spot ( i.e. the optic disc) |
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Definition
| A rare condition in which sensory perceptions are mixed up ( e.g. one can 'see' sounds as colors) |
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Definition
| A highly contagious bacterial infection of the conjunctiva and cornea, causing blindness in millions of people in Africa and Asia. |
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Definition
| Normal condition of the eyes ( i.e. no refractive defects ) |
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Definition
| An inner ear disorder characterized by dizziness, ringing in the ears, a sensitivity to sounds and loss of hearing. |
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Definition
| A ringing or buzzing noise in the ears. |
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Definition
| A sensation of dizziness. |
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