Wada test - Revision history

Dvalverde at 19:16, 28 April 2008

Dvalverde — Mon, 28 Apr 2008 19:16:16 GMT

←Older revision		Revision as of 19:16, 28 April 2008
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	[[Functional magnetic resonance imaging]] (fMRI) has increasingly been taking the place of the Wada test, which can be more invasive and less accurate. The fMRI, on the other hand, has been used to directly visualize the origin of seizures and to detect blood flow changes. Although radical personality changes are rarely noticed in patients who undergo the Wada procedure, disinhibition, [[hemiplegia]], [[hemineglect]], and shivering are common. The Wada procedure, though, does not usually cause long term problems and for a person who suffers from constant seizures, completing the Wada procedure successfully can be life-changing.		[[Functional magnetic resonance imaging]] (fMRI) has increasingly been taking the place of the Wada test, which can be more invasive and less accurate. The fMRI, on the other hand, has been used to directly visualize the origin of seizures and to detect blood flow changes. Although radical personality changes are rarely noticed in patients who undergo the Wada procedure, disinhibition, [[hemiplegia]], [[hemineglect]], and shivering are common. The Wada procedure, though, does not usually cause long term problems and for a person who suffers from constant seizures, completing the Wada procedure successfully can be life-changing.
		+
		+	[http://youtube.com/watch?v=TY2FBG39V_w Wada test described in Spanish but able to see what is happening]

	== Difference in Brain Organization between Right and Left-Handers? ==		== Difference in Brain Organization between Right and Left-Handers? ==

	The Wada Test put to rest the belief that the left hander's brain was the mirror image of the right hander's brain. Results from the test showed the pattern of lateralization found in most right-handers was the same in about 70% of left-handers. Of the 30% remaining, half showed the opposite pattern (known as reversed asymmetry) and the other half showed language and spatial skills distributed in both hemispheres (referred to as bi-lateral distribution).		The Wada Test put to rest the belief that the left hander's brain was the mirror image of the right hander's brain. Results from the test showed the pattern of lateralization found in most right-handers was the same in about 70% of left-handers. Of the 30% remaining, half showed the opposite pattern (known as reversed asymmetry) and the other half showed language and spatial skills distributed in both hemispheres (referred to as bi-lateral distribution).
		+
		+

	== Resources ==		== Resources ==

Prea: /* Tests */

Prea — Mon, 28 Apr 2008 14:44:03 GMT

Tests

←Older revision		Revision as of 14:44, 28 April 2008
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	== Tests ==		== Tests ==

-	The tests used for the Wada procedure vary depending on the center. The Montreal Neurological ~~Instituted~~ technique, however, can be used as a guide on the types of tests given and how the results are used. Memory tests usually consist in showing the patient five items that test both his or her verbal and visual memory. For example, the patient may be asked to memorize two pictures of an object, an actual object, a word, and then a sentence. After the anesthetic wears off, the patient will be asked to recall or choose among a number of items, the original five items shown when only one hemisphere was awake. If the majority of items cannot be remembered, the temporal lobe and [[hippocampus]] that stayed awake cannot mediate memory. This information is important because if temporal lobe needs to be removed, for a person with epilepsy for example, the removal would not cause a problem since this lobe is already known to be dysfunctional. Likewise if the other hemisphere was the one with the epileptic focus, removing that temporal lobe and the [[hippocampus]] may cause [[amnesia]] in the individual.	+	The tests used for the Wada procedure vary depending on the center. The Montreal Neurological Institute technique, however, can be used as a guide on the types of tests given and how the results are used. Memory tests usually consist in showing the patient five items that test both his or her verbal and visual memory. For example, the patient may be asked to memorize two pictures of an object, an actual object, a word, and then a sentence. After the anesthetic wears off, the patient will be asked to recall or choose among a number of items, the original five items shown when only one hemisphere was awake. If the majority of items cannot be remembered, the temporal lobe and [[hippocampus]] that stayed awake cannot mediate memory. This information is important because if temporal lobe needs to be removed, for a person with epilepsy for example, the removal would not cause a problem since this lobe is already known to be dysfunctional. Likewise if the other hemisphere was the one with the epileptic focus, removing that temporal lobe and the [[hippocampus]] may cause [[amnesia]] in the individual.

	== Modern Uses of the Wada Test ==		== Modern Uses of the Wada Test ==

Sriegsecker at 00:16, 28 April 2008

Sriegsecker — Mon, 28 Apr 2008 00:16:31 GMT

←Older revision		Revision as of 00:16, 28 April 2008
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	*http://www-personal.umich.edu/~gusb/wadadesc.html		*http://www-personal.umich.edu/~gusb/wadadesc.html
	*Stirling, John. Introducing Neuropsychology		*Stirling, John. Introducing Neuropsychology
-	*Ogden, Jenni A. Fractured Minds: A Case Study Approach to ~~Clincial~~ Neuropsychology.	+	*Ogden, Jenni A. Fractured Minds: A Case Study Approach to Clinical Neuropsychology.

Bchristian: added links

Bchristian — Sun, 27 Apr 2008 19:54:50 GMT

added links

←Older revision		Revision as of 19:54, 27 April 2008
Line 9:		Line 9:
	== Tests ==		== Tests ==

-	The tests used for the Wada procedure vary depending on the center. The Montreal Neurological Instituted technique, however, can be used as a guide on the types of tests given and how the results are used. Memory tests usually consist in showing the patient five items that test both his or her verbal and visual memory. For example, the patient may be asked to memorize two pictures of an object, an actual object, a word, and then a sentence. After the anesthetic wears off, the patient will be asked to recall or choose among a number of items, the original five items shown when only one hemisphere was awake. If the majority of items cannot be remembered, the temporal lobe and hippocampus that stayed awake cannot mediate memory. This information is important because if temporal lobe needs to be removed, for a person with epilepsy for example, the removal would not cause a problem since this lobe is already known to be dysfunctional. Likewise if the other hemisphere was the one with the epileptic focus, removing that temporal lobe and the hippocampus may cause amnesia in the individual.	+	The tests used for the Wada procedure vary depending on the center. The Montreal Neurological Instituted technique, however, can be used as a guide on the types of tests given and how the results are used. Memory tests usually consist in showing the patient five items that test both his or her verbal and visual memory. For example, the patient may be asked to memorize two pictures of an object, an actual object, a word, and then a sentence. After the anesthetic wears off, the patient will be asked to recall or choose among a number of items, the original five items shown when only one hemisphere was awake. If the majority of items cannot be remembered, the temporal lobe and [[hippocampus]] that stayed awake cannot mediate memory. This information is important because if temporal lobe needs to be removed, for a person with epilepsy for example, the removal would not cause a problem since this lobe is already known to be dysfunctional. Likewise if the other hemisphere was the one with the epileptic focus, removing that temporal lobe and the [[hippocampus]] may cause [[amnesia]] in the individual.

	== Modern Uses of the Wada Test ==		== Modern Uses of the Wada Test ==

Bchristian: added links

Bchristian — Sun, 27 Apr 2008 19:53:23 GMT

added links

←Older revision		Revision as of 19:53, 27 April 2008
Line 13:		Line 13:
	== Modern Uses of the Wada Test ==		== Modern Uses of the Wada Test ==

-	Functional ~~MRI~~ (fMRI) has increasingly been taking the place of the Wada test, which can be more invasive and less accurate. The fMRI, on the other hand, has been used to directly visualize the origin of seizures and to detect blood flow changes. Although radical personality changes are rarely noticed in patients who undergo the Wada procedure, disinhibition, hemiplegia, hemineglect, and shivering are common. The Wada procedure, though, does not usually cause long term problems and for a person who suffers from constant seizures, completing the Wada procedure successfully can be life-changing.	+	[[Functional magnetic resonance imaging]] (fMRI) has increasingly been taking the place of the Wada test, which can be more invasive and less accurate. The fMRI, on the other hand, has been used to directly visualize the origin of seizures and to detect blood flow changes. Although radical personality changes are rarely noticed in patients who undergo the Wada procedure, disinhibition, [[hemiplegia]], [[hemineglect]], and shivering are common. The Wada procedure, though, does not usually cause long term problems and for a person who suffers from constant seizures, completing the Wada procedure successfully can be life-changing.

	== Difference in Brain Organization between Right and Left-Handers? ==		== Difference in Brain Organization between Right and Left-Handers? ==

Prea at 01:45, 23 March 2008

Prea — Sun, 23 Mar 2008 01:45:18 GMT

←Older revision		Revision as of 01:45, 23 March 2008
Line 13:		Line 13:
	== Modern Uses of the Wada Test ==		== Modern Uses of the Wada Test ==

-	Functional MRI (fMRI) has increasingly been taking the place of the Wada test, which can be more invasive and less accurate. The fMRI, on the other hand, has been used to directly visualize the origin of seizures and to detect blood flow changes. The Wada procedure, though, does not usually cause long term problems and for a person who suffers from constant seizures, completing the Wada procedure successfully can be life-changing.	+	Functional MRI (fMRI) has increasingly been taking the place of the Wada test, which can be more invasive and less accurate. The fMRI, on the other hand, has been used to directly visualize the origin of seizures and to detect blood flow changes. Although radical personality changes are rarely noticed in patients who undergo the Wada procedure, disinhibition, hemiplegia, hemineglect, and shivering are common. The Wada procedure, though, does not usually cause long term problems and for a person who suffers from constant seizures, completing the Wada procedure successfully can be life-changing.

	== Difference in Brain Organization between Right and Left-Handers? ==		== Difference in Brain Organization between Right and Left-Handers? ==

Prea: /* Modern Uses of the Wada Test */

Prea — Sun, 23 Mar 2008 01:40:13 GMT

Modern Uses of the Wada Test

←Older revision		Revision as of 01:40, 23 March 2008
Line 13:		Line 13:
	== Modern Uses of the Wada Test ==		== Modern Uses of the Wada Test ==

-	Functional MRI (fMRI) has increasingly been taking the place of the Wada test, which can be more invasive and less accurate. The fMRI, on the other hand, has been used to directly visualize the origin of seizures and to detect blood flow changes. The Wada procedure, ~~however~~, does not usually cause long term problems and for a person who suffers from constant seizures, completing the Wada procedure successfully can be life-changing.	+	Functional MRI (fMRI) has increasingly been taking the place of the Wada test, which can be more invasive and less accurate. The fMRI, on the other hand, has been used to directly visualize the origin of seizures and to detect blood flow changes. The Wada procedure, though, does not usually cause long term problems and for a person who suffers from constant seizures, completing the Wada procedure successfully can be life-changing.

	== Difference in Brain Organization between Right and Left-Handers? ==		== Difference in Brain Organization between Right and Left-Handers? ==

Admin: cleaned up apostrophes

Admin — Wed, 19 Mar 2008 16:29:14 GMT

cleaned up apostrophes

←Older revision		Revision as of 16:29, 19 March 2008
Line 17:		Line 17:
	== Difference in Brain Organization between Right and Left-Handers? ==		== Difference in Brain Organization between Right and Left-Handers? ==

-	The Wada Test put to rest the belief that the left ~~handerâ��s~~ brain was the mirror image of the right ~~handerâ��s~~ brain. Results from the test showed the pattern of lateralization found in most right-handers was the same in about 70% of left-handers. Of the 30% remaining, half showed the opposite pattern (known as reversed asymmetry) and the other half showed language and spatial skills distributed in both hemispheres (referred to as bi-lateral distribution).	+	The Wada Test put to rest the belief that the left hander's brain was the mirror image of the right hander's brain. Results from the test showed the pattern of lateralization found in most right-handers was the same in about 70% of left-handers. Of the 30% remaining, half showed the opposite pattern (known as reversed asymmetry) and the other half showed language and spatial skills distributed in both hemispheres (referred to as bi-lateral distribution).

	== Resources ==		== Resources ==

Admin: put picture to right and fixed Resources list

Admin — Wed, 19 Mar 2008 16:28:43 GMT

put picture to right and fixed Resources list

←Older revision		Revision as of 16:28, 19 March 2008
Line 1:		Line 1:
	[[Category:Neuropsychological methods]]		[[Category:Neuropsychological methods]]
		+

	== Overview ==		== Overview ==

-		+	[[Image:wada.jpg\|right]]
	The Wada Test, officially referred to as the intracarotid sodium amobarbital procedure or ISAP, is named after Dr. Juhn E. Wada, the first physician who performed it. It is used to determine localization, that is which functions are located in which part of the brain. The test consists of administering a drug, sodium amytal, to the internal carotid artery one hemisphere at a time, thereby inducing a temporary lesion lasting only a few minutes. Before injecting the drug, the patient is given tests measuring his or her abilities in speech, object naming, and memory. While one hemisphere is anesthetized, the neuropsychologist then tests the other hemisphere to evaluate how well it manages speech, naming, and memory.		The Wada Test, officially referred to as the intracarotid sodium amobarbital procedure or ISAP, is named after Dr. Juhn E. Wada, the first physician who performed it. It is used to determine localization, that is which functions are located in which part of the brain. The test consists of administering a drug, sodium amytal, to the internal carotid artery one hemisphere at a time, thereby inducing a temporary lesion lasting only a few minutes. Before injecting the drug, the patient is given tests measuring his or her abilities in speech, object naming, and memory. While one hemisphere is anesthetized, the neuropsychologist then tests the other hemisphere to evaluate how well it manages speech, naming, and memory.

	== Tests ==		== Tests ==

-		+	The tests used for the Wada procedure vary depending on the center. The Montreal Neurological Instituted technique, however, can be used as a guide on the types of tests given and how the results are used. Memory tests usually consist in showing the patient five items that test both his or her verbal and visual memory. For example, the patient may be asked to memorize two pictures of an object, an actual object, a word, and then a sentence. After the anesthetic wears off, the patient will be asked to recall or choose among a number of items, the original five items shown when only one hemisphere was awake. If the majority of items cannot be remembered, the temporal lobe and hippocampus that stayed awake cannot mediate memory. This information is important because if temporal lobe needs to be removed, for a person with epilepsy for example, the removal would not cause a problem since this lobe is already known to be dysfunctional. Likewise if the other hemisphere was the one with the epileptic focus, removing that temporal lobe and the hippocampus may cause amnesia in the individual.
-	The tests used for the Wada procedure vary depending on the center. The Montreal Neurological Instituted technique, however, can be used as a guide on the types of tests given and how the results are used. Memory tests usually consist in showing the patient five items that test both his or her verbal and visual memory. For example, the patient may be asked to memorize two pictures of an object, an actual object, a word, and then a sentence. After the anesthetic wears off, the patient will be asked to recall or choose among a number of items, the original five items shown when only one hemisphere was awake. If the majority of items cannot be remembered, the temporal lobe and hippocampus that stayed awake cannot mediate memory. This information is important because if temporal lobe needs to be removed, for a person with epilepsy for example, the removal would not cause a problem since this lobe is already known to be dysfunctional. Likewise if the other hemisphere was the one with the epileptic focus, removing that temporal lobe and the hippocampus may cause amnesia in the individual.	+
-		+
-	~~[[Image:wada.jpg]]~~	+

	== Modern Uses of the Wada Test ==		== Modern Uses of the Wada Test ==

-		+	Functional MRI (fMRI) has increasingly been taking the place of the Wada test, which can be more invasive and less accurate. The fMRI, on the other hand, has been used to directly visualize the origin of seizures and to detect blood flow changes. The Wada procedure, however, does not usually cause long term problems and for a person who suffers from constant seizures, completing the Wada procedure successfully can be life-changing.
-	Functional MRI (fMRI) has increasingly been taking the place of the Wada test, which can be more invasive and less accurate. The fMRI, on the other hand, has been used to directly visualize the origin of seizures and to detect blood flow changes. The Wada procedure, however, does not usually cause long term problems and for a person who suffers from constant seizures, completing the Wada procedure successfully can be life-changing.	+

	== Difference in Brain Organization between Right and Left-Handers? ==		== Difference in Brain Organization between Right and Left-Handers? ==

-		+	The Wada Test put to rest the belief that the left handerâ��s brain was the mirror image of the right handerâ��s brain. Results from the test showed the pattern of lateralization found in most right-handers was the same in about 70% of left-handers. Of the 30% remaining, half showed the opposite pattern (known as reversed asymmetry) and the other half showed language and spatial skills distributed in both hemispheres (referred to as bi-lateral distribution).
-	The Wada Test put to rest the belief that the left ~~hander’s~~ brain was the mirror image of the right ~~hander’s~~ brain. Results from the test showed the pattern of lateralization found in most right-handers was the same in about 70% of left-handers. Of the 30% remaining, half showed the opposite pattern (known as reversed asymmetry) and the other half showed language and spatial skills distributed in both hemispheres (referred to as bi-lateral distribution).	+
-		+

	== Resources ==		== Resources ==

-		+	*http://www.epilepsy.com/epilepsy/surgery_wada
-	http://www.epilepsy.com/epilepsy/surgery_wada	+	*http://www-personal.umich.edu/~gusb/wadadesc.html
-	http://www-personal.umich.edu/~gusb/wadadesc.html	+	*Stirling, John. Introducing Neuropsychology
-	Stirling, John. Introducing Neuropsychology	+	*Ogden, Jenni A. Fractured Minds: A Case Study Approach to Clincial Neuropsychology.
-	Ogden, Jenni A. Fractured Minds: A Case Study Approach to Clincial Neuropsychology.	+

Admin: moved picture to our site

Admin — Wed, 19 Mar 2008 16:25:07 GMT

moved picture to our site

←Older revision		Revision as of 16:25, 19 March 2008
Line 11:		Line 11:
	The tests used for the Wada procedure vary depending on the center. The Montreal Neurological Instituted technique, however, can be used as a guide on the types of tests given and how the results are used. Memory tests usually consist in showing the patient five items that test both his or her verbal and visual memory. For example, the patient may be asked to memorize two pictures of an object, an actual object, a word, and then a sentence. After the anesthetic wears off, the patient will be asked to recall or choose among a number of items, the original five items shown when only one hemisphere was awake. If the majority of items cannot be remembered, the temporal lobe and hippocampus that stayed awake cannot mediate memory. This information is important because if temporal lobe needs to be removed, for a person with epilepsy for example, the removal would not cause a problem since this lobe is already known to be dysfunctional. Likewise if the other hemisphere was the one with the epileptic focus, removing that temporal lobe and the hippocampus may cause amnesia in the individual.		The tests used for the Wada procedure vary depending on the center. The Montreal Neurological Instituted technique, however, can be used as a guide on the types of tests given and how the results are used. Memory tests usually consist in showing the patient five items that test both his or her verbal and visual memory. For example, the patient may be asked to memorize two pictures of an object, an actual object, a word, and then a sentence. After the anesthetic wears off, the patient will be asked to recall or choose among a number of items, the original five items shown when only one hemisphere was awake. If the majority of items cannot be remembered, the temporal lobe and hippocampus that stayed awake cannot mediate memory. This information is important because if temporal lobe needs to be removed, for a person with epilepsy for example, the removal would not cause a problem since this lobe is already known to be dysfunctional. Likewise if the other hemisphere was the one with the epileptic focus, removing that temporal lobe and the hippocampus may cause amnesia in the individual.

-	[[Image:~~Example~~.jpg]]~~http://www3.hku.hk/philodep/joelau/media/wada-test.jpg~~	+	[[Image:wada.jpg]]

	== Modern Uses of the Wada Test ==		== Modern Uses of the Wada Test ==