title: Anarchic hand with abnormal agency following right inferior parietal lobe damage: a case report.
abstract: Anarchic hand syndrome (AHS) is characterized by goal-directed movements performed without volitional control (agency). Different AHS subtypes have been identified; however, few studies have examined the posterior subtype. We report a case of AHS following right-hemisphere parietal damage, with left-sided somatosensory and proprioceptive impairment. Agency was examined for nonanarchic (volitional) movements performed using the anarchic hand. The patient experienced abnormal agency for movements whether motor intention and visual feedback were congruent or incongruent, but not when intention was absent (passive movement). Findings suggest a general disturbance of veridical motor awareness and agency in this case of parietal AHS.
authors.affiliation: a Department of Psychology , University of Hertfordshire , Hertfordshire , UK.
authors.forename: Paul M
authors.initials: PM
authors.lastname: Jenkinson
authors.forename: Nicola M J
authors.initials: NM
authors.lastname: Edelstyn
authors.forename: Catherine
authors.initials: C
authors.lastname: Preston
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Ellis
mesh_terms: D000328:Adult; D055964:Alien Limb Phenomenon / Q000209:etiology / Q000473:pathology / Q000523:psychology*; D001364:Awareness; D001930:Brain Injuries / Q000150:complications* / Q000473:pathology; D005260:Female; D006801:Humans; D009068:Movement; D010296:Parietal Lobe / Q000473:pathology*; D011597:Psychomotor Performance; D020886:Somatosensory Disorders / Q000209:etiology; D014836:Volition; D055815:Young Adult
keywords: agency; anarchic hand; motor awareness; parietal lobe