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From Nordan Symposia
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[[File:lighterstill.jpg]][[File:Photolibrary_rf_photo_of_dizzy_person.jpg|right|frame]]
==Origin==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] ''disy'', from [http://nordan.daynal.org/wiki/index.php?title=English#ca._600-1100.09THE_OLD_ENGLISH.2C_OR_ANGLO-SAXON_PERIOD Old English] ''dysig'' stupid; akin to Old High German ''tusig'' stupid
*[http://en.wikipedia.org/wiki/12th_century before 12th Century]
==Definitions==
*1: [[foolish]], silly
*2a : having a whirling sensation in the head with a tendency to fall
:b : mentally [[confused]]
*3a : causing giddiness or mental confusion <dizzy heights>
:b : caused by or marked by giddiness
:c : extremely rapid <prices climbing at a dizzy [[rate]]>
==Description==
'''Dizziness''' refers to an impairment in spatial [[perception]] and [[stability]]. The term is somewhat imprecise. It can be used to mean [http://en.wikipedia.org/wiki/Vertigo vertigo], [http://en.wikipedia.org/wiki/Presyncope presyncope], disequilibrium, or a non-specific [[feeling]] such as giddiness or [[foolishness]].
One can induce dizziness by [[engaging]] in disorientating activities such as spinning.
*[http://en.wikipedia.org/wiki/Vertigo_(medical) Vertigo] is a specific medical term used to describe the sensation of spinning or having one's surroundings spin about them. Many people find vertigo very disturbing and often report associated nausea and vomiting. It represents about 25% of cases of occurrences of dizziness.[5]
*[http://en.wikipedia.org/wiki/Equilibrioception Disequilibrium] is the sensation of being off balance, and is most often characterized by frequent falls in a specific direction. This condition is not often associated with nausea or vomiting.
*[http://en.wikipedia.org/wiki/Presyncope Presyncope] is lightheadedness, muscular weakness and feeling faint as opposed to a syncope, which is actually fainting.
*Non-specific dizziness is often psychiatric in origin. It is a diagnosis of exclusion and can sometimes be brought about by hyperventilation.[4]
A [http://en.wikipedia.org/wiki/Stroke stroke] is the cause of isolated dizziness in 0.7% of people who present to the emergency room.[5]
Many conditions cause ''dizziness'' because multiple parts of the [[body]] are required for [[maintaining]] [[balance]] including the inner ear, eyes, [[muscles]], [[skeleton]], and the [[nervous system]].
Common [[physiological]] causes of ''dizziness'' include:
*inadequate blood supply to the brain due to:
:a sudden fall in blood pressure
:heart problems or artery blockages
*loss or distortion of vision or visual cues
*disorders of the inner ear
*distortion of brain/nervous function by medications such as anticonvulsants and sedatives
[[Category: Health]]
==Origin==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] ''disy'', from [http://nordan.daynal.org/wiki/index.php?title=English#ca._600-1100.09THE_OLD_ENGLISH.2C_OR_ANGLO-SAXON_PERIOD Old English] ''dysig'' stupid; akin to Old High German ''tusig'' stupid
*[http://en.wikipedia.org/wiki/12th_century before 12th Century]
==Definitions==
*1: [[foolish]], silly
*2a : having a whirling sensation in the head with a tendency to fall
:b : mentally [[confused]]
*3a : causing giddiness or mental confusion <dizzy heights>
:b : caused by or marked by giddiness
:c : extremely rapid <prices climbing at a dizzy [[rate]]>
==Description==
'''Dizziness''' refers to an impairment in spatial [[perception]] and [[stability]]. The term is somewhat imprecise. It can be used to mean [http://en.wikipedia.org/wiki/Vertigo vertigo], [http://en.wikipedia.org/wiki/Presyncope presyncope], disequilibrium, or a non-specific [[feeling]] such as giddiness or [[foolishness]].
One can induce dizziness by [[engaging]] in disorientating activities such as spinning.
*[http://en.wikipedia.org/wiki/Vertigo_(medical) Vertigo] is a specific medical term used to describe the sensation of spinning or having one's surroundings spin about them. Many people find vertigo very disturbing and often report associated nausea and vomiting. It represents about 25% of cases of occurrences of dizziness.[5]
*[http://en.wikipedia.org/wiki/Equilibrioception Disequilibrium] is the sensation of being off balance, and is most often characterized by frequent falls in a specific direction. This condition is not often associated with nausea or vomiting.
*[http://en.wikipedia.org/wiki/Presyncope Presyncope] is lightheadedness, muscular weakness and feeling faint as opposed to a syncope, which is actually fainting.
*Non-specific dizziness is often psychiatric in origin. It is a diagnosis of exclusion and can sometimes be brought about by hyperventilation.[4]
A [http://en.wikipedia.org/wiki/Stroke stroke] is the cause of isolated dizziness in 0.7% of people who present to the emergency room.[5]
Many conditions cause ''dizziness'' because multiple parts of the [[body]] are required for [[maintaining]] [[balance]] including the inner ear, eyes, [[muscles]], [[skeleton]], and the [[nervous system]].
Common [[physiological]] causes of ''dizziness'' include:
*inadequate blood supply to the brain due to:
:a sudden fall in blood pressure
:heart problems or artery blockages
*loss or distortion of vision or visual cues
*disorders of the inner ear
*distortion of brain/nervous function by medications such as anticonvulsants and sedatives
[[Category: Health]]
