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Conference Paper: Deficit in Motor Self‐monitoring in Schizophrenia with Passivity Experiences: A Novel Joint Position Matching Paradigm

TitleDeficit in Motor Self‐monitoring in Schizophrenia with Passivity Experiences: A Novel Joint Position Matching Paradigm
Authors
Issue Date2018
PublisherWiley-Blackwell Publishing Asia. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1751-7893
Citation
IEPA 11th International Conference on Early Intervention in Mental Health: Prevention and Early Intervention: Broadening the Scope, Boston, Massachusetts, USA, 7–10 October 2018. In Early Intervention in Psychiatry, 2018, v. 12 n. S1, p. 155 How to Cite?
AbstractDeficit in motor self-monitoring is associated with passivity experiences. It is proposed that the loss of the sense of agency in patients with passivity experiences originates from abnormalities in the motor control system. The current study examined the abnormalities of efferent copy and predicted state in the motor control system of patients with relevant (passivity) symptoms. Using a novel paradigm which is a modified joint position matching task, we compared the replication accuracy between voluntary and passive (tactile and verbal) movements in 20 patients with (mean age 31.9 ± 12.0 years) and 20 patients without (mean age 32.3 ± 13.3 years) relevant symptoms and 25 healthy controls (mean age 31.3 ± 8.4 years). It was hypothesized that the replication accuracy is improved in voluntary condition in healthy control and less apparent in patients without relevant symptoms but not be observed in patients with relevant symptoms. The healthy controls and patients without relevant symptoms had better performance in voluntary conditions when compared with passive tactile (2.21 ± 0.75 cm vs 1.79 ± 0.51 cm; p= .02) and both passive conditions (1.95 ± 0.69 cm vs. tactile 1.18 ± 0.51 cm; p< .001 and verbal 1.53 ± 0.57; p=.01) respectively. However, the patients with relevant symptoms had poorer performance in voluntary condition than passive tactile condition (2.26 ± 0.88 vs. 1.86 ± 0.99 cm, p=.03). The findings suggested that schizophrenic patients with passivity experiences are impaired in the motor performances that utilized the direct information from efferent copy and predicted state.
DescriptionPoster Session B - no. B23
Persistent Identifierhttp://hdl.handle.net/10722/269511
ISSN
2019 Impact Factor: 2.257
2015 SCImago Journal Rankings: 1.071

 

DC FieldValueLanguage
dc.contributor.authorSuen, YN-
dc.contributor.authorLaw, CS-
dc.contributor.authorChan, KW-
dc.contributor.authorChang, WC-
dc.contributor.authorLee, HME-
dc.contributor.authorHui, CLM-
dc.contributor.authorChan, MCM-
dc.contributor.authorChen, EYH-
dc.date.accessioned2019-04-24T08:09:10Z-
dc.date.available2019-04-24T08:09:10Z-
dc.date.issued2018-
dc.identifier.citationIEPA 11th International Conference on Early Intervention in Mental Health: Prevention and Early Intervention: Broadening the Scope, Boston, Massachusetts, USA, 7–10 October 2018. In Early Intervention in Psychiatry, 2018, v. 12 n. S1, p. 155-
dc.identifier.issn1751-7885-
dc.identifier.urihttp://hdl.handle.net/10722/269511-
dc.descriptionPoster Session B - no. B23-
dc.description.abstractDeficit in motor self-monitoring is associated with passivity experiences. It is proposed that the loss of the sense of agency in patients with passivity experiences originates from abnormalities in the motor control system. The current study examined the abnormalities of efferent copy and predicted state in the motor control system of patients with relevant (passivity) symptoms. Using a novel paradigm which is a modified joint position matching task, we compared the replication accuracy between voluntary and passive (tactile and verbal) movements in 20 patients with (mean age 31.9 ± 12.0 years) and 20 patients without (mean age 32.3 ± 13.3 years) relevant symptoms and 25 healthy controls (mean age 31.3 ± 8.4 years). It was hypothesized that the replication accuracy is improved in voluntary condition in healthy control and less apparent in patients without relevant symptoms but not be observed in patients with relevant symptoms. The healthy controls and patients without relevant symptoms had better performance in voluntary conditions when compared with passive tactile (2.21 ± 0.75 cm vs 1.79 ± 0.51 cm; p= .02) and both passive conditions (1.95 ± 0.69 cm vs. tactile 1.18 ± 0.51 cm; p< .001 and verbal 1.53 ± 0.57; p=.01) respectively. However, the patients with relevant symptoms had poorer performance in voluntary condition than passive tactile condition (2.26 ± 0.88 vs. 1.86 ± 0.99 cm, p=.03). The findings suggested that schizophrenic patients with passivity experiences are impaired in the motor performances that utilized the direct information from efferent copy and predicted state.-
dc.languageeng-
dc.publisherWiley-Blackwell Publishing Asia. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1751-7893-
dc.relation.ispartofEarly Intervention in Psychiatry-
dc.relation.ispartofThe IEPA 11th International Conference on Early Intervention in Mental Health, 2018-
dc.titleDeficit in Motor Self‐monitoring in Schizophrenia with Passivity Experiences: A Novel Joint Position Matching Paradigm-
dc.typeConference_Paper-
dc.identifier.emailSuen, YN: suenyn@hku.hk-
dc.identifier.emailChan, KW: kwsherry@hku.hk-
dc.identifier.emailChang, WC: changwc@hku.hk-
dc.identifier.emailLee, HME: edwinlhm@hku.hk-
dc.identifier.emailHui, CLM: christyh@hku.hk-
dc.identifier.emailChan, MCM: mcmchan@hku.hk-
dc.identifier.emailChen, EYH: eyhchen@hku.hk-
dc.identifier.authoritySuen, YN=rp02481-
dc.identifier.authorityChan, KW=rp00539-
dc.identifier.authorityChang, WC=rp01465-
dc.identifier.authorityLee, HME=rp01575-
dc.identifier.authorityHui, CLM=rp01993-
dc.identifier.authorityChan, MCM=rp02337-
dc.identifier.authorityChen, EYH=rp00392-
dc.identifier.hkuros297331-
dc.identifier.volume12-
dc.identifier.issueS1-
dc.identifier.spage155-
dc.identifier.epage155-
dc.publisher.placeUnited States-

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