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Topic: Agnosia

	Agnosia: Encyclopedia of Neurological Disorders
		Agnosia is a neuropsychological disorder characterized by the inability to recognize common objects, persons, or sounds, in the absence of perceptual disability.
		Agnosia is caused by lesions to the parietal and temporal lobes of the brain, regions involved in storing memories and associations of objects.
		Agnosia, from the Greek "not knowing," describes a collection of disorders where the ability to recognize objects or sounds or retrieve information about them is impaired, in the absence of other perceptual difficulties, including memory, intellectual capabilities, and the capacity for communication.
	health.enotes.com /neurological-disorders-encyclopedia/agnosia (979 words)

	Agnosia
		Agnosia (“a-gnosis”, “non-knowledge”) means a loss of ability to recognize objects, persons, sounds, shapes or smells while the specific sense is not defective nor is there any significant memory loss.
		Visual agnosia is associated with lesions[?] of the left occipital lobe[?] and temporal lobes.
		It may be object agnosia for specific faces, perception disorder[?] in face perception system or syndrome that causes separation of perception of face and memories associated of the face.
	www.ebroadcast.com.au /lookup/encyclopedia/ag/Agnosia.html (401 words)

	[No title]
		In some cases, the agnosia is due to a "disconnection syndrome" such that the langauge areas of the brain become disconnected from the areas of the brain which are perceiving.
		In general, this form of visual agnosia is associated with damage involving the medial and deep mesial portion of the left occipial lobe as well as the basal (middle-inferior) temporal lobe.
		By contrast "associative visual agnosia," is due to disconnection from the language area, such that auditory equivalents (or the names of) visual items cannot be matched to a visual perception.This is usually associated with left inferior and middle temporal (area 37) occipital abnormalities, and to lesions to and atrophy of the parietal occipital cortex.
	brainmind.com /Agnosia.html (3784 words)

	Sacramento Christian Counseling - Agnosia
		Agnosia refers to the inability to recognize people or objects even when basic sensory modalities, such as vision, are intact.
		Visual agnosia is a neurological disorder distinguished by the inability to recognize familiar objects.
		Visual agnosia is associated with lesions of the left occipital and temporal lobes.
	www.bobparkinslmft.com /info/agnosia.html (564 words)

	Visual Agnosia webpage (Site not responding. Last check: 2007-11-03)
		Apperceptive agnosia is typically characterized by an inability to recognize familiar objects caused by damage to early perceptual processes and associative agnosia is typically characterized by an inability to recognize familiar objects despite having no damage to early perceptual processes (Vecera and Gilds 1998).
		It is theorized that patients with visual agnosia have a presence of random visual noise as a result of obstructing air bubbles circulating in the blood or from blood clots present in an intact blood vessel (Farah et al.
		Further compounding the difficulty of defining and understanding agnosia is the proposal of similar impairments present in patients with the same hemisphere of the brain damaged (Humphreys, 1999).
	hubel.sfasu.edu /courseinfo/SL02/cp2agnosia.htm (2925 words)

	Redwine.leg
		Agnosia ('failure to know') refers to an inability to perceive or identify a stimulus, even though its details can be detected and a person with this disorder can retain a normal intellectual capacity.
		A common symptom of apperceptive visual agnosia is prosopagnosia, the inability to recognize faces.
		She argues that human brain processing is graded, interactive, and distributed, that processes occur across the brain and not in a linear fashion which was the long held belief.
	www.psychology.sbc.edu /redwine1.htm (1057 words)

	visual agnosia (Site not responding. Last check: 2007-11-03)
		Visual agnosia is a neurological disorder characterized by the inability to recognize familiar objects (Farah, 1990).
		The earliest researchers of agnosia theorized that visual agnosia was the result of reduced low-level visual processing with impairments to mental abilities (Vecera and Gilds 1998).
		It is theorized that patients with visual agnosia have a presence of random visual noise because of obstructing air bubbles circulating in the blood or the presence of blood clots present in an intact blood vessel (Farah et al.
	hubel.sfasu.edu /courseinfo/SL02/visual_agnosia.htm (1410 words)

	Agnosia Information Page: National Institute of Neurological Disorders and Stroke (NINDS)
		Agnosia is a rare disorder characterized by an inability to recognize and identify objects or persons despite having knowledge of the characteristics of the objects or persons.
		People with agnosia may have difficulty recognizing the geometric features of an object or face or may be able to perceive the geometric features but not know what the object is used for or whether a face is familiar or not.
		Agnosia can be limited to one sensory modality such as vision or hearing.
	www.ninds.nih.gov /disorders/agnosia/agnosia.htm (324 words)

	Agnosia in detail
		D.F. A person with object agnosia, "for example, would be unable to recognize common objects by sight, even though the visual fields were perfectly intact and even though the ability to recognize the same objects using other senses (such as hearing or touch) might be intact." (Nolte, 1999)
		Agnosia is manifested as a disorder of the ventral stream, which is used to identify objects and perceive allocentric space (where objects are located with respect to other objects).
		The dorsal stream remains intact, this stream is involved in the control of movement and the perception of egocentric space (where objects are with respect to the perceivers position).
	ahsmail.uwaterloo.ca /kin356/agnosia/agnosia_in_detail.htm (155 words)

	Agnosia Information
		Agnosia (a-gnosis, "non-knowledge") is a loss of ability to recognize objects, persons, sounds, shapes or smells while the specific sense is not defective nor is there any significant memory loss.
		Object Agnosia is the inability to recognize objects.
		Somatosensory Agnosia or Astereognosia is connected to tactile sense - that is, touch.
	www.infoforyourhealth.com /Brain_Disorders/Agnosia.htm (500 words)

	Agnosia - Memory Loss and Dementia: Cognitive Disorders - Baycrest
		Agnosia is a breakdown in a person's ability to associate an object with its meaning, to recognize objects, people and him/herself.
		Often people with agnosia suffer from what is known as "perceptual neglect" (hemi-inattention) or the inability to interpret the left side of the environment.
		Agnosia is another example of cognitive break down.
	www.baycrest.org /MemoryandAging/Session_2/default_37.asp (465 words)

	Specific Types of Dysfunction: Brain Dysfunction: Merck Manual Home Edition
		Agnosia is loss of the ability to associate objects with their usual role or function.
		Agnosia is caused by dysfunction in the parietal, temporal, or occipital lobes of the brain, where memories of the uses and importance of familiar objects, sights, and sounds are stored.
		When one parietal lobe is damaged (usually the result of a stroke), people have difficulty identifying a familiar object, such as a key or safety pin, that is placed in the hand on the side of the body opposite the damage.
	www.merck.com /mmhe/sec06/ch082/ch082c.html (1763 words)

	RA: Resident Advisor - Agnosia Records - Record Label (Site not responding. Last check: 2007-11-03)
		Agnosia Records is one of the first independent record labels in Israel, dedicated to electronic music, and is arguably the home to quality Israely progressive.
		The concept of Agnosia artists house music is the use of middle eastern elements, unique sounds that are hidden in the Israeli culture.
		Agnosia Records is one of the first independent record labels in Israel, dedicated to electronic music.
	www.residentadvisor.net /label_view.asp?ID=69 (158 words)

	Computer Systems Senior Tech Project
		Visual agnosia is a rare neurological disorder typified by an inability to recognize familiar objects.
		Within the realm of visual agnosia there are various categories and subcategories, the two main ones being apperceptive agnosia and associative agnosia.
		Associative agnosia is characterized by problems at later stages of visual processing.
	www.angelfire.com /psy/pkp/visualagnosia.html (195 words)

	Review of Martha Farah, Visual Agnosia (Site not responding. Last check: 2007-11-03)
		Historically the visual agnosias have been classified as either "apperceptive"--entailing some degree of perceptual impairment, though not of the sort sufficient to prevent object recognition--or "associative"--lacking such impairment.
		Since common sense has long inspired skepticism in the very existence of agnosia, many traditional case reports were devoted more to a proof of the existence of the syndrome than to a careful cataloging of what capacities are or are not present.
		An implication of this account is that one will never find object agnosia without some degree of either prosopagnosia or alexia and that "agnosia without prosopagnosia is a more severe case of the same impairment that underlies pure alexia" (133).
	www.ucc.uconn.edu /~wwwphil/freview.html (1837 words)

	Agnosia - WrongDiagnosis.com
		Agnosia is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH).
		This means that Agnosia, or a subtype of Agnosia, affects less than 200,000 people in the US population.
		With a diagnosis of Agnosia, it is also important to consider whether there is an underlying condition causing Agnosia.
	www.wrongdiagnosis.com /a/agnosia/intro.htm (497 words)

	Clinical Neuropsychology (Site not responding. Last check: 2007-11-03)
		It is apparent that sensory perception of the object is disconnected from memories associated with the object.
		Visual agnosia is associated with lesions of the left occipital and temporal lobes.Many patients have a severe visual field defect on the right side because of the injuryto the left occipital lobe.
		Competing theories of prosopagnosia stress that it is an object agnosia for specific faces, 2) a type of perceptual disorder involving a system specific for face perception and 3) a type of amnesia syndrome in which the perception of a face is dissociated from previous memories of the face.
	nanonline.org /nandistance/mtbi/ClinNeuro/agnosia.html (631 words)

	Agnosia - Wikipedia, the free encyclopedia
		Finger agnosia is the inability to distinguish the fingers on the hand.
		This is separate from word deafness (also known as pure word deafness) which is agnosia connected to verbal information.
		In some cases, occupational therapy or speech therapy can improve agnosia, depending on its etiology.
	en.wikipedia.org /wiki/Agnosia (649 words)

	Introduction: Agnosia - CureResearch.com
		Agnosia: Agnosia is a rare disorder characterized by an inability to recognize and identify objects or persons despite having knowledge of the characteristics of the objects or persons.
		Researching symptoms of Agnosia: Further information about the symptoms of Agnosia is available including a list of symptoms of Agnosia, or alternatively return to research other symptoms in the symptom center.
		Statistics and Agnosia: Various sources and calculations are available in statistics about Agnosia, prevalence and incidence statistics for Agnosia, and you can also research other medical statistics in our statistics center.
	www.cureresearch.com /a/agnosia/intro.htm (316 words)

	Agnosia
		AGNOSIA is a general term for a loss of ability to recognize objects, people, sounds, shapes, or smells; that is, the inability to attach appropriate meaning to objective sense-data.
		agnosia -A general term for a loss of ability to recognize objects, people, sounds, shapes, or smells; that is, the inability to attach appropriate meaning to objective sense-data.
		environmental agnosia - Inability to orient to physically familiar places but nonetheless able to orient to an abstract representation such as a map or floor plan.
	spot.colorado.edu /~dubin/talks/agnosia.html (1426 words)

	PS3019-agnosia (Site not responding. Last check: 2007-11-03)
		McCarthy, R. A., and Warrington, E. Visual associative agnosia: a clinico-anatomical study of a single case.
		Warrington, E. Agnosia: the impairment of object recognition.
		Warrington, E. K., and James, M. Visual apperceptive agnosia: A clinico-anatomical study of three cases.
	www.le.ac.uk /pc/aec7/ps3019/ps3019-agnosia.html (952 words)

	Color agnosia - Wikipedia, the free encyclopedia
		Color agnosia ("agnosia" is Greek for non-knowledge) is a medical or psychological condition that prevents a person from recognizing colors (even though the eyes are capable of distinguishing them).
		It is a specific form of agnosia and generally results from damage to the visual cortex, often in V4 (as opposed to most other kinds of color blindness, which derive from photoreceptors.
		It should be distinguished from color anomia, which is a condition where the patient can distinguish between colors but cannot connect those colors to their names.
	en.wikipedia.org /wiki/Color_agnosia (146 words)

	Toe agnosia in Gerstmann syndrome -- Tucha et al. 63 (3): 399 -- Journal of Neurology, Neurosurgery, and Psychiatry
		agnosia in Gerstmann syndrome is usually accompanied by toe agnosia.
		Finger agnosia in the context of this syndrome may be better named
		In addition to the four symptoms of the Gerstmann syndrome we found an agnosia of the toes related to finger agnosia.
	jnnp.bmj.com /cgi/content/full/63/3/399 (2558 words)

	Agnosia
		Impairment can vary from mild inattention to complete inability to perform spatial reasoning with regard to the afflicted side.
		It may be object agnosia for specific faces or a specific face perception disorder.
		If an article link referred you here, you might want to go back and fix it to point directly to the intended page.
	www.mrsci.com /Medical-Terms/Agnosia.php (529 words)

	Symptoms of Agnosia - WrongDiagnosis.com
		Note that Agnosia symptoms usually refers to various symptoms known to a patient, but the phrase Agnosia signs may refer to those signs only noticable by a doctor:
		This signs and symptoms information for Agnosia has been gathered from various sources, may not be fully accurate, and may not be the full list of Agnosia signs or Agnosia symptoms.
		Furthermore, signs and symptoms of Agnosia may vary on an individual basis for each patient.
	www.wrongdiagnosis.com /a/agnosia/symptoms.htm (427 words)

	Integrative agnosia following progressive multifocal leukoencephalopathy.
		His copying and matching of line drawings was intact, suggesting that his agnosia was associative.
		These alterations, together with his feature-by-feature descriptions of objects and copying, suggest that his agnosia was due to a disturbance in integrating local form features, as described by Riddoch and Humphreys (1987).
		This interpretation is supported by the findings that his tactile recognition and semantic and structural knowledge of the objects he could not identify visually were intact.
	www.aegis.com /aidsline/1994/sep/M9490565.html (398 words)

	Agnosia (Site not responding. Last check: 2007-11-03)
		Agnosia refers to a failure to perceive or identify a stimulus by means of a sensory modality
		Visual agnosia is the failure to recognize visual stimuli
		Apperceptive visual agnostics cannot recognize a cup, for example, but by feeling or touching it they may be able to come up with the name (cannot draw or copy an object though).
	wise.fau.edu /~jtaft/Brains/Ch6/tsld019.htm (178 words)

	Autism and visual agnosia in a child with right occipital lobectomy -- Jambaqué et al. 65 (4): 555 -- Journal of ...
		Overlapping between symptoms of autism and visual agnosia: a case study.
		Visual agnosia with temporo-occipital brain lesions in an autistic child: a case study.
		Ariel R, Sadeh M. Congenital visual agnosia and prosopagnosia in a child: a case report.
	jnnp.bmjjournals.com /cgi/content/full/65/4/555 (3606 words)

	agnosia (Site not responding. Last check: 2007-11-03)
		The inability to recognize a door, e.g., by the sound of its slamming or from its photograph alone.
		In agnosia, while the perception itself (i.e., feeling a coin's shape or hearing a door slam) is normal, recognition of the objects is not.
		Usage: Studies of agnosia reveal how the brain processes nonverbal gestures, objects, and sensations apart from speech and words.
	members.aol.com /nonverbal2/agnosia.htm (197 words)

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