Source retrieval is not properly differentiated from object retrieval in early schizophrenia: An fMRI study using virtual reality
Source memory, the ability to identify the context in which a memory occurred, is impaired in schizophrenia and has been related to clinical symptoms such as hallucinations. The neurobiological underpinnings of this deficit are not well understood. Twenty-five patients with recent onset schizophreni...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015-01-01
|
| Series: | NeuroImage: Clinical |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213158214001156 |
| _version_ | 1818641550117175296 |
|---|---|
| author | Colin Hawco Lisa Buchy Michael Bodnar Sarah Izadi Jennifer Dell'Elce Katrina Messina Ridha Joober Ashok Malla Martin Lepage |
| author_facet | Colin Hawco Lisa Buchy Michael Bodnar Sarah Izadi Jennifer Dell'Elce Katrina Messina Ridha Joober Ashok Malla Martin Lepage |
| author_sort | Colin Hawco |
| collection | DOAJ |
| description | Source memory, the ability to identify the context in which a memory occurred, is impaired in schizophrenia and has been related to clinical symptoms such as hallucinations. The neurobiological underpinnings of this deficit are not well understood. Twenty-five patients with recent onset schizophrenia (within the first 4.5 years of treatment) and twenty-four healthy controls completed a source memory task. Participants navigated through a 3D virtual city, and had 20 encounters of an object with a person at a place. Functional magnetic resonance imaging was performed during a subsequent forced-choice recognition test. Two objects were presented and participants were asked to either identify which object was seen (new vs. old object recognition), or identify which of the two old objects was associated with either the person or the place being presented (source memory recognition). Source memory was examined by contrasting person or place with object. Both patients and controls demonstrated significant neural activity to source memory relative to object memory, though activity in controls was much more widespread. Group differences were observed in several regions, including the medial parietal and cingulate cortex, lateral frontal lobes and right superior temporal gyrus. Patients with schizophrenia did not differentiate between source and object memory in these regions. Positive correlations with hallucination proneness were observed in the left frontal and right middle temporal cortices and cerebellum. Patients with schizophrenia have a deficit in the neural circuits which facilitate source memory, which may underlie both the deficits in this domain and be related to auditory hallucinations. |
| first_indexed | 2024-12-16T23:28:57Z |
| format | Article |
| id | doaj.art-13d63222b4154960a9bd1039663049b0 |
| institution | Directory Open Access Journal |
| issn | 2213-1582 |
| language | English |
| last_indexed | 2024-12-16T23:28:57Z |
| publishDate | 2015-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | NeuroImage: Clinical |
| spelling | doaj.art-13d63222b4154960a9bd1039663049b02022-12-21T22:11:55ZengElsevierNeuroImage: Clinical2213-15822015-01-017C33634610.1016/j.nicl.2014.08.006Source retrieval is not properly differentiated from object retrieval in early schizophrenia: An fMRI study using virtual realityColin Hawco0Lisa Buchy1Michael Bodnar2Sarah Izadi3Jennifer Dell'Elce4Katrina Messina5Ridha Joober6Ashok Malla7Martin Lepage8Department of Neurology & Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, CanadaDepartment of Neurology & Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, CanadaDepartment of Neurology & Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, CanadaDepartment of Neurology & Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, CanadaPrevention and Early Intervention Program for Psychoses, Douglas Mental Health University Institute, Verdun, CanadaPrevention and Early Intervention Program for Psychoses, Douglas Mental Health University Institute, Verdun, CanadaPrevention and Early Intervention Program for Psychoses, Douglas Mental Health University Institute, Verdun, CanadaPrevention and Early Intervention Program for Psychoses, Douglas Mental Health University Institute, Verdun, CanadaDepartment of Neurology & Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, CanadaSource memory, the ability to identify the context in which a memory occurred, is impaired in schizophrenia and has been related to clinical symptoms such as hallucinations. The neurobiological underpinnings of this deficit are not well understood. Twenty-five patients with recent onset schizophrenia (within the first 4.5 years of treatment) and twenty-four healthy controls completed a source memory task. Participants navigated through a 3D virtual city, and had 20 encounters of an object with a person at a place. Functional magnetic resonance imaging was performed during a subsequent forced-choice recognition test. Two objects were presented and participants were asked to either identify which object was seen (new vs. old object recognition), or identify which of the two old objects was associated with either the person or the place being presented (source memory recognition). Source memory was examined by contrasting person or place with object. Both patients and controls demonstrated significant neural activity to source memory relative to object memory, though activity in controls was much more widespread. Group differences were observed in several regions, including the medial parietal and cingulate cortex, lateral frontal lobes and right superior temporal gyrus. Patients with schizophrenia did not differentiate between source and object memory in these regions. Positive correlations with hallucination proneness were observed in the left frontal and right middle temporal cortices and cerebellum. Patients with schizophrenia have a deficit in the neural circuits which facilitate source memory, which may underlie both the deficits in this domain and be related to auditory hallucinations.http://www.sciencedirect.com/science/article/pii/S2213158214001156Source memorySchizophreniaAssociative memoryFirst episodeVirtual realityHallucinations |
| spellingShingle | Colin Hawco Lisa Buchy Michael Bodnar Sarah Izadi Jennifer Dell'Elce Katrina Messina Ridha Joober Ashok Malla Martin Lepage Source retrieval is not properly differentiated from object retrieval in early schizophrenia: An fMRI study using virtual reality NeuroImage: Clinical Source memory Schizophrenia Associative memory First episode Virtual reality Hallucinations |
| title | Source retrieval is not properly differentiated from object retrieval in early schizophrenia: An fMRI study using virtual reality |
| title_full | Source retrieval is not properly differentiated from object retrieval in early schizophrenia: An fMRI study using virtual reality |
| title_fullStr | Source retrieval is not properly differentiated from object retrieval in early schizophrenia: An fMRI study using virtual reality |
| title_full_unstemmed | Source retrieval is not properly differentiated from object retrieval in early schizophrenia: An fMRI study using virtual reality |
| title_short | Source retrieval is not properly differentiated from object retrieval in early schizophrenia: An fMRI study using virtual reality |
| title_sort | source retrieval is not properly differentiated from object retrieval in early schizophrenia an fmri study using virtual reality |
| topic | Source memory Schizophrenia Associative memory First episode Virtual reality Hallucinations |
| url | http://www.sciencedirect.com/science/article/pii/S2213158214001156 |
| work_keys_str_mv | AT colinhawco sourceretrievalisnotproperlydifferentiatedfromobjectretrievalinearlyschizophreniaanfmristudyusingvirtualreality AT lisabuchy sourceretrievalisnotproperlydifferentiatedfromobjectretrievalinearlyschizophreniaanfmristudyusingvirtualreality AT michaelbodnar sourceretrievalisnotproperlydifferentiatedfromobjectretrievalinearlyschizophreniaanfmristudyusingvirtualreality AT sarahizadi sourceretrievalisnotproperlydifferentiatedfromobjectretrievalinearlyschizophreniaanfmristudyusingvirtualreality AT jenniferdellelce sourceretrievalisnotproperlydifferentiatedfromobjectretrievalinearlyschizophreniaanfmristudyusingvirtualreality AT katrinamessina sourceretrievalisnotproperlydifferentiatedfromobjectretrievalinearlyschizophreniaanfmristudyusingvirtualreality AT ridhajoober sourceretrievalisnotproperlydifferentiatedfromobjectretrievalinearlyschizophreniaanfmristudyusingvirtualreality AT ashokmalla sourceretrievalisnotproperlydifferentiatedfromobjectretrievalinearlyschizophreniaanfmristudyusingvirtualreality AT martinlepage sourceretrievalisnotproperlydifferentiatedfromobjectretrievalinearlyschizophreniaanfmristudyusingvirtualreality |