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Anosognosia during intracarotid barbiturate anesthesia: unawareness or amnesia for weakness.
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Previous studies have demonstrated asymmetric hemispheric contributions to deficit awareness during hemisphere inactivation with intracarotid barbiturate infusion (Wada studies). These observations provide insight into the neuropsychological basis of anosognosia for hemiparesis (AHP), arguing
Dissociation of anosognosia and phantom movement during the Wada test.
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OBJECTIVE
Patients who misperceive that they are moving their paralysed arm (phantom movements) may not recognise its weakness. Therefore, the relation between phantom limb movements and anosognosia for hemiplegia during selective right hemispheric anaesthesia (the Wada test) was
Awareness of and memory for arm weakness during intracarotid sodium amytal testing.
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The traditional association between anosognosia for hemiplegia and the right hemisphere was investigated in 31 patients with unilateral temporal lobe pathology during intracarotid sodium amytal testing (ISA) before epilepsy surgery. Recall of arm weakness was examined by questioning at the end of
Anosognosia for hemiplegia: patient retrospections.
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Various competing hypotheses have been put forth to explain how it is possible for patients to be unaware of their own profound weakness. We investigated whether patients' retrospections after resolution of their anosognosia along with their clinical features are consonant with these hypotheses.
The Phenomenology of Acute Anosognosia for Hemiplegia.
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[Anosognosia for hemiplegia in a patient with pontine infarction].
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We report a patient with anosognosia for hemiplegia associated with a right pontine infarction. A 51-year-old woman with histories of hypertension and diabetes mellitus was admitted because of weakness of her left upper and lower extremities. On neurologic examination, she was alert and oriented
Double Disassociation of Anosognosia for Alexia and Simultanagnosia but Quantitative Awareness of Optic Ataxia.
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A 66-yr-old man with a history of atrial fibrillation and a pacemaker developed sudden onset confusion, disorientation, and visual disturbance without motor weakness. Clinically, significant deficits were found in reading (alexia) and simultaneous multiobject perception (simultanagnosia), both of
[A 74-year-old man with urinary incontinence, right leg weakness and multiple cranial nerve palsies].
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We report a 74-year-old man with a lung cancer, who developed right leg weakness, neurogenic bladder, and multiple cranial nerve palsies. The patient was well until December of 1992, when he was 74-year-old, when he noted transient double vision; in February of 1993, he noted numb sensation and
[A 36-year-old woman with acute onset left hemiplegia and anosognosia].
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We report a 36-year-old woman with right hemiplegia, anosognosia, and rapidly deteriorating course. She was well until the end of January, 1995 when she had an onset of fever, sputum, and cough. A 5 x 5 tumor was found in her left lower lobe. She was admitted to the Pulmonary Medicine on May 24,
Anosognosia for hemiplegia: an electrophysiologic investigation of the feed-forward hypothesis.
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The cause of anosognosia for hemiplegia (AHP) remains unclear. Weakness is detected when there is a mismatch between the expectancy of movement and the sensory perception of movement. The feed-forward hypothesis of AHP posits that there is a failure of detection because there is a loss of motor
Anosognosia: examining the disconnection hypothesis.
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OBJECTIVE
To test the hypothesis that anosognosia for hemiparesis results from intrahemispheric disconnection.
METHODS
Using right carotid barbiturate injection as a model for anosognosia for hemiparesis, systematic attempts were made to modify deficit awareness by providing the left hemisphere with
Functional cerebral space theory: Towards an integration of theory and mechanisms of left hemineglect, anosognosia, and anosodiaphoria.
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BACKGROUND
The current case study presents a 43 year old African American woman admitted to a Tertiary Care Rehabilitation unit at a major medical center for concerns over left-sided anesthesia and weakness. Head scans indicate a right middle cerebral arterial distribution infarct altering blood
Study of anosognosia.
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Anosognosia (denial of weakness) and "anosognosic phenomena" (other abnormal attitudes to a weak limb) were studied in 100 acute hemiplegics. Both conditions were associated with lesions of either hemisphere. Apathy, visual field defect, and impaired picture identification were particularly
Anosognosia and asomatognosia during intracarotid amobarbital inactivation.
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BACKGROUND
Anosognosia (i.e., denial of hemiparesis) and asomatognosia (i.e., inability to recognize the affected limb as one's own) occur more frequently with right cerebral lesions. However, the incidence, relative recovery, and underlying mechanisms remain unclear.
METHODS
Anosognosia and
Possible mechanisms of anosognosia: a defect in self-awareness.
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Anosognosia of hemiplegia is of interest for both pragmatic and theoretical reasons. We discuss several neuropsychological theories that have been proposed to explain this deficit. Although for psychological reasons people might deny deficits, the denial hypothesis cannot account for the hemispheric
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