Alien motor phenomena: A window on to agency.

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Bibliographic Details
Title:	Alien motor phenomena: A window on to agency.
Authors:	Spence, Sean A.
Source:	Cognitive Neuropsychiatry. Aug2002, Vol. 7 Issue 3, p211-220. 10p.
Subjects:	Movement disorders, Neurobiology
Abstract:	Introduction. Alien motor phenomena arise in neurological and psychiatric contexts and are likely to implicate several distributed brain systems. Method. A selective literature review, focusing on cognitive neurobiological accounts of alien/anarchic limb, somatoparaphrenia, and delusions of alien control (passivity phenomena); supplemented by an account of the cognitive neuroanatomy of action and agency (subjective sense of causation) in the normal state. Results. Alien motor phenomena reflect impairments of agency through at least two mechanisms. (1) A disinhibition of ''lower'' motor centres giving rise to relatively stereotypic and contextually inappropriate motor routines (as emerge following medial frontal and corpus callosal lesions). (2) A disturbance of the perception of self-initiated movement, so that control of movement (causation) is attributed to an alien entity (phenomena associated with right parietal lobe lesions, focal epilepsy, and hyperactivity in acute schizophrenia). Conclusion. Whereas alien/anarchic limb dysfunction may be relatively easily explained in cognitive neurobiological terms, a comprehensive account of alien control will require further empirical ingenuity. Current models invoke disturbed feed-forward mechanisms, imitation, and the sense of another's agency (''nonself attribution''). [ABSTRACT FROM AUTHOR]
	Copyright of Cognitive Neuropsychiatry is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database:	Psychology and Behavioral Sciences Collection

FullText	Links: – Type: pdflink Text: Availability: 0
Header	DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 7016999 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0
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Items	– Name: Title Label: Title Group: Ti Data: Alien motor phenomena: A window on to agency. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Spence%2C+Sean+A%2E%22">Spence, Sean A.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Cognitive+Neuropsychiatry%22">Cognitive Neuropsychiatry</searchLink>. Aug2002, Vol. 7 Issue 3, p211-220. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Movement+disorders%22">Movement disorders</searchLink><br /><searchLink fieldCode="DE" term="%22Neurobiology%22">Neurobiology</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Introduction. Alien motor phenomena arise in neurological and psychiatric contexts and are likely to implicate several distributed brain systems. Method. A selective literature review, focusing on cognitive neurobiological accounts of alien/anarchic limb, somatoparaphrenia, and delusions of alien control (passivity phenomena); supplemented by an account of the cognitive neuroanatomy of action and agency (subjective sense of causation) in the normal state. Results. Alien motor phenomena reflect impairments of agency through at least two mechanisms. (1) A disinhibition of ''lower'' motor centres giving rise to relatively stereotypic and contextually inappropriate motor routines (as emerge following medial frontal and corpus callosal lesions). (2) A disturbance of the perception of self-initiated movement, so that control of movement (causation) is attributed to an alien entity (phenomena associated with right parietal lobe lesions, focal epilepsy, and hyperactivity in acute schizophrenia). Conclusion. Whereas alien/anarchic limb dysfunction may be relatively easily explained in cognitive neurobiological terms, a comprehensive account of alien control will require further empirical ingenuity. Current models invoke disturbed feed-forward mechanisms, imitation, and the sense of another's agency (''nonself attribution''). [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Cognitive Neuropsychiatry is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo	BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/13546800244000094 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 211 Subjects: – SubjectFull: Movement disorders Type: general – SubjectFull: Neurobiology Type: general Titles: – TitleFull: Alien motor phenomena: A window on to agency. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Spence, Sean A. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2002 Type: published Y: 2002 Identifiers: – Type: issn-print Value: 13546805 Numbering: – Type: volume Value: 7 – Type: issue Value: 3 Titles: – TitleFull: Cognitive Neuropsychiatry Type: main
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