System – Nervous

What Is Dementia? Dementia is the term used to describe a group of symptoms that show significant deterioration of an individual’s intellectual and social abilities. The deterioration in intellectual function is progressive and is characterized by memory and cognitive impairment involving deficits ...

What Is Depression? Depression is a mood disorder characterized by absence of cheerfulness, dejection, and loss of interest or pleasure in living, making the person dysfunctional and unable to cope with or perform tasks of daily living. More than a ...

What Is Chronic Syndrome Fatigue? Chronic fatigue syndrome is a debilitating illness characterized by persistent or relapsing overwhelming and incapacitating fatigue not relieved by rest, having a definite onset and often accompanied by numerous symptoms involving various body systems. This ...

What Is Headache Or Emicrania? Emicrania is a headache resulting from stimulation of, or traction of, or pressure on any of the pain sensitive structures of the head characterized by pain felt anywhere in the head. In addition to gluten ...

What Is Chronic Fatigue? Chronic fatigue or lassitude is a state of weariness not relieved by rest and the inability to do normal physical or mental work. Q: What are causes of chronic fatigue? A: Chronic fatigue can be a ...

What Is Peripheral Neuropathy? Peripheral neuropathy is a syndrome involving damage to one or more peripheral nerves characterized by impaired nerve transmission. Peripheral nerves are nerves of the body outside the brain and spinal cord. Q: Why is nerve transmission impaired? ...

What Is Multiple Sclerosis? Multiple sclerosis is an autoimmune disease of the central nervous system characterized by patchy inflammation of the myelin sheath surrounding nerve cells that produces multiple and varied neurologic symptoms and signs due to demyelination. Q: What ...

What Is Inability To Concentrate? Inability to concentrate is a mental dysfunction characterized by trouble fixing the mind on one subject to the exclusion of all other thoughts. What Is Inability To Concentrate In Celiac Disease and/or Gluten Sensitivity?

What Is Apathy? Apathy is an abnormal emotional state that is characterized by indifference to things which others find interesting, moving or exciting, and diminished motivation to perform regular daily activities. The neural mechanisms of apathy are postulated to involve ...

What Is Anxiety? Anxiety or worry is a distressing emotional state of mind or mood that is characterized by a vague uneasiness, unpleasant feelings of apprehension or anticipation of danger and by interference with normal functioning, ranging from mild qualms ...

What Is Insomnia? Insomnia is a distressing sleep disorder that includes inability to fall asleep, inability to stay asleep, and inability to get deep sleep depending on the type of insomnia. Q: What are the types of insomnia? A: There ...

What Is Cerebral Vasculitis? Cerebral vasculitis, also called vasculitis of the central nervous system (CNS), is an autoimune attack against elastin fibers in the walls of arteries that bring blood to the head. Early recogniton may reduce poor outcomes.1 Cerebral ...

What Are Tremors? Tremors are repetitive patterns of involuntary muscle contraction and relaxation originating from disorder in the basal ganglia of the brain. See image of hand tremor (to left) courtesy of Antonio Piedade. Rythmic shaking may affect various parts of ...

What Is Tetany? Tetany is a painful feature of low blood calcium or low blood magnesium causing hyperexcitability of all nerves which in turn stimulates involuntary sudden, intermittent and repetitious tonic spasms of muscles. Tonic spasms are steady rather than jerky. Causes include ...

What Is Schizophrenia? Schizophrenia is a thought disorder characterized by psychotic symptoms and inappropriate and bizarre behavior. Schizophrenia involves dysfunction in any of these areas: Cognition which are thinking skills that include intellect, language, mathematical ability, memory, perception, reasoning, judgment, ...