Skip to main content
Top
Published in: BMC Psychiatry 1/2009

Open Access 01-12-2009 | Research article

Apathy is associated with executive functioning in first episode psychosis

Authors: Ann Faerden, Anja Vaskinn, Arnstein Finset, Ingrid Agartz, Elizabeth Ann Barrett, Svein Friis, Carmen Simonsen, Ole A Andreassen, Ingrid Melle

Published in: BMC Psychiatry | Issue 1/2009

Login to get access

Abstract

Background

The underlying nature of negative symptoms in psychosis is poorly understood. Investigation of the relationship between the different negative subsymptoms and neurocognition is one approach to understand more of the underlying nature. Apathy, one of the subsymptoms, is also a common symptom in other brain disorders. Its association with neurocognition, in particular executive functioning, is well documented in other brain disorders, but only studied in one former study of chronic patients with schizophrenia. This study investigates the association between apathy and neurocognitive functioning in patients with first episode psychosis (FEP), with the hypothesis that apathy is more associated with tests representing executive function than tests representing other neurocognitive domains.

Methods

Seventy-one FEP patients were assessed with an extensive neuropsychological test battery. Level of apathy was assessed with the abridged Apathy Evaluation Scale (AES-C-Apathy).

Results

AES-C-Apathy was only significantly associated with tests from the executive domain [Semantic fluency (r = .37, p < .01), Phonetic fluency (r = .25, p < .05)] and working memory [Letter Number Span (r = .26; p =< .05)]; the first two representing the initiation part of executive function. Confounding variables such as co-occuring depression, positive symptoms or use of antipsychotic medication did not significantly influence the results.

Conclusion

We replicated in FEP patients the relationship between apathy and executive functioning reported in another study for chronic patients with schizophrenia. We also found apathy in FEP to have the same relationship to executive functioning, as assessed with the Verbal fluency tests, as that reported in patients with other brain disorders, pointing to a common underlying nature of this symptom across disorders.
Literature
1.
go back to reference Kirkpatrick B, Fenton WS, Carpenter WT, Marder SR: The NIMH-MATRICS consensus statement on negative symptoms. Schizophr Bull. 2006, 32 (2): 214-9. 10.1093/schbul/sbj053.CrossRefPubMedPubMedCentral Kirkpatrick B, Fenton WS, Carpenter WT, Marder SR: The NIMH-MATRICS consensus statement on negative symptoms. Schizophr Bull. 2006, 32 (2): 214-9. 10.1093/schbul/sbj053.CrossRefPubMedPubMedCentral
2.
go back to reference Elvevag B, Goldberg TE: Cognitive impairment in schizophrenia is the core of the disorder. Crit Rev Neurobiol. 2000, 14 (1): 1-21.CrossRefPubMed Elvevag B, Goldberg TE: Cognitive impairment in schizophrenia is the core of the disorder. Crit Rev Neurobiol. 2000, 14 (1): 1-21.CrossRefPubMed
3.
go back to reference O'Leary DS, Flaum M, Kesler ML, Flashman LA, Arndt S, Andreasen NC: Cognitive correlates of the negative, disorganized, and psychotic symptom dimensions of schizophrenia. J Neuropsychiatry Clin Neurosci. 2000, 12 (1): 4-15.CrossRefPubMed O'Leary DS, Flaum M, Kesler ML, Flashman LA, Arndt S, Andreasen NC: Cognitive correlates of the negative, disorganized, and psychotic symptom dimensions of schizophrenia. J Neuropsychiatry Clin Neurosci. 2000, 12 (1): 4-15.CrossRefPubMed
4.
go back to reference Heydebrand G, Weiser M, Rabinowitz J, Hoff AL, DeLisi LE, Csernansky JG: Correlates of cognitive deficits in first episode schizophrenia. Schizophr Res. 68 (1): 1-9. 10.1016/S0920-9964(03)00097-5. Heydebrand G, Weiser M, Rabinowitz J, Hoff AL, DeLisi LE, Csernansky JG: Correlates of cognitive deficits in first episode schizophrenia. Schizophr Res. 68 (1): 1-9. 10.1016/S0920-9964(03)00097-5.
5.
go back to reference Rund BR, Melle I, Friis S, Larsen TK, Midboe LJ, Opjordsmoen S, et al: Neurocognitive dysfunction in first-episode psychosis: correlates with symptoms, premorbid adjustment, and duration of untreated psychosis. Am J Psychiatry. 2004, 161 (3): 466-72. 10.1176/appi.ajp.161.3.466.CrossRefPubMed Rund BR, Melle I, Friis S, Larsen TK, Midboe LJ, Opjordsmoen S, et al: Neurocognitive dysfunction in first-episode psychosis: correlates with symptoms, premorbid adjustment, and duration of untreated psychosis. Am J Psychiatry. 2004, 161 (3): 466-72. 10.1176/appi.ajp.161.3.466.CrossRefPubMed
6.
go back to reference Keefe RS, Bilder RM, Harvey PD, Davis SM, Palmer BW, Gold JM, et al: Baseline neurocognitive deficits in the CATIE schizophrenia trial. Neuropsychopharmacology. 2006, 31 (9): 2033-46. 10.1038/sj.npp.1301072.CrossRefPubMed Keefe RS, Bilder RM, Harvey PD, Davis SM, Palmer BW, Gold JM, et al: Baseline neurocognitive deficits in the CATIE schizophrenia trial. Neuropsychopharmacology. 2006, 31 (9): 2033-46. 10.1038/sj.npp.1301072.CrossRefPubMed
7.
go back to reference Harvey PD, Koren D, Reichenberg A, Bowie CR: Negative symptoms and cognitive deficits: what is the nature of their relationship?. Schizophr Bull. 2006, 32 (2): 250-8. 10.1093/schbul/sbj011.CrossRefPubMed Harvey PD, Koren D, Reichenberg A, Bowie CR: Negative symptoms and cognitive deficits: what is the nature of their relationship?. Schizophr Bull. 2006, 32 (2): 250-8. 10.1093/schbul/sbj011.CrossRefPubMed
8.
go back to reference Stolar N, Berenbaum H, Banich MT, Barch D: Neuropsychological correlates of alogia and affective flattening in schizophrenia. Biol Psychiatry. 35 (3): 164-72. 10.1016/0006-3223(94)91148-7. Stolar N, Berenbaum H, Banich MT, Barch D: Neuropsychological correlates of alogia and affective flattening in schizophrenia. Biol Psychiatry. 35 (3): 164-72. 10.1016/0006-3223(94)91148-7.
9.
go back to reference Roth RM, Flashman LA, Saykin AJ, McAllister TW, Vidaver R: Apathy in schizophrenia: reduced frontal lobe volume and neuropsychological deficits. Am J Psychiatry. 2004, 161 (1): 157-9. 10.1176/appi.ajp.161.1.157.CrossRefPubMed Roth RM, Flashman LA, Saykin AJ, McAllister TW, Vidaver R: Apathy in schizophrenia: reduced frontal lobe volume and neuropsychological deficits. Am J Psychiatry. 2004, 161 (1): 157-9. 10.1176/appi.ajp.161.1.157.CrossRefPubMed
10.
go back to reference Sumiyoshi C, Sumiyoshi T, Nohara S, Yamashita I, Matsui M, Kurachi M, et al: Disorganization of semantic memory underlies alogia in schizophrenia: an analysis of verbal fluency performance in Japanese subjects. Schizophr Res. 74 (1): 91-100. 10.1016/j.schres.2004.05.011. Sumiyoshi C, Sumiyoshi T, Nohara S, Yamashita I, Matsui M, Kurachi M, et al: Disorganization of semantic memory underlies alogia in schizophrenia: an analysis of verbal fluency performance in Japanese subjects. Schizophr Res. 74 (1): 91-100. 10.1016/j.schres.2004.05.011.
11.
go back to reference Gur RE, Kohler CG, Ragland JD, Siegel SJ, Lesko K, Bilker WB, et al: Flat Affect in Schizophrenia: Relation to Emotion Processing and Neurocognitive Measures 4419. Schizophr Bull. 32 (2): 279-87. 10.1093/schbul/sbj041. 2006 Apr 1; Gur RE, Kohler CG, Ragland JD, Siegel SJ, Lesko K, Bilker WB, et al: Flat Affect in Schizophrenia: Relation to Emotion Processing and Neurocognitive Measures 4419. Schizophr Bull. 32 (2): 279-87. 10.1093/schbul/sbj041. 2006 Apr 1;
12.
go back to reference Marin RS: Apathy: a neuropsychiatric syndrome. J Neuropsychiatry Clin Neurosci. 1991, 3 (3): 243-54.CrossRefPubMed Marin RS: Apathy: a neuropsychiatric syndrome. J Neuropsychiatry Clin Neurosci. 1991, 3 (3): 243-54.CrossRefPubMed
13.
go back to reference Brown RG, Pluck G: Negative symptoms: the 'pathology' of motivation and goal-directed behaviour. Trends Neurosci. 2000, 23 (9): 412-7. 10.1016/S0166-2236(00)01626-X.CrossRefPubMed Brown RG, Pluck G: Negative symptoms: the 'pathology' of motivation and goal-directed behaviour. Trends Neurosci. 2000, 23 (9): 412-7. 10.1016/S0166-2236(00)01626-X.CrossRefPubMed
14.
go back to reference Foussias G, Remington G: Negative Symptoms in Schizophrenia: Avolition and Occam's Razor. Schizophr Bull. Foussias G, Remington G: Negative Symptoms in Schizophrenia: Avolition and Occam's Razor. Schizophr Bull.
15.
go back to reference Barch DM: Emotion, Motivation, and Reward Processing in Schizophrenia Spectrum Disorders: What We Know and Where We Need to Go. Schizophr Bull. 2008, 34 (5): 816-818. 10.1093/schbul/sbn092.CrossRefPubMedPubMedCentral Barch DM: Emotion, Motivation, and Reward Processing in Schizophrenia Spectrum Disorders: What We Know and Where We Need to Go. Schizophr Bull. 2008, 34 (5): 816-818. 10.1093/schbul/sbn092.CrossRefPubMedPubMedCentral
16.
go back to reference Stuss DT, Knight RT: Principles of Frontal Lobe Function. 2002, New York: Oxford University PressCrossRef Stuss DT, Knight RT: Principles of Frontal Lobe Function. 2002, New York: Oxford University PressCrossRef
17.
go back to reference Tekin S, Cummings JL: Frontal-subcortical neuronal circuits and clinical neuropsychiatry: an update. J Psychosom Res. 2002, 53 (2): 647-54. 10.1016/S0022-3999(02)00428-2.CrossRefPubMed Tekin S, Cummings JL: Frontal-subcortical neuronal circuits and clinical neuropsychiatry: an update. J Psychosom Res. 2002, 53 (2): 647-54. 10.1016/S0022-3999(02)00428-2.CrossRefPubMed
18.
go back to reference Landes AM, Sperry SD, Strauss ME, Geldmacher DS: Apathy in Alzheimer's disease. J Am Geriatr Society. 2001, 49 (12): 1700-7. 10.1046/j.1532-5415.2001.49282.x.CrossRef Landes AM, Sperry SD, Strauss ME, Geldmacher DS: Apathy in Alzheimer's disease. J Am Geriatr Society. 2001, 49 (12): 1700-7. 10.1046/j.1532-5415.2001.49282.x.CrossRef
20.
go back to reference Baudic S, Maison P, Dolbeau G, Boisse MF, Bartolomeo P, Dalla BG, et al: Cognitive impairment related to apathy in early Huntington's disease. Dement Geriatr Cogn Disord. 2006, 21 (5–6): 316-21. 10.1159/000091523.CrossRefPubMed Baudic S, Maison P, Dolbeau G, Boisse MF, Bartolomeo P, Dalla BG, et al: Cognitive impairment related to apathy in early Huntington's disease. Dement Geriatr Cogn Disord. 2006, 21 (5–6): 316-21. 10.1159/000091523.CrossRefPubMed
21.
go back to reference Andersson S, Bergedalen AM: Cognitive correlates of apathy in traumatic brain injury. Neuropsychiatry Neuropsychol Behav Neurol. 2002, 15 (3): 184-91.PubMed Andersson S, Bergedalen AM: Cognitive correlates of apathy in traumatic brain injury. Neuropsychiatry Neuropsychol Behav Neurol. 2002, 15 (3): 184-91.PubMed
22.
go back to reference Isella V, Melzi P, Grimaldi M, Iurlaro S, Piolti R, Ferrarese C, et al: Clinical, neuropsychological, and morphometric correlates of apathy in Parkinson's disease. Movement Disorders. 2002, 17 (2): 366-71. 10.1002/mds.10041.CrossRefPubMed Isella V, Melzi P, Grimaldi M, Iurlaro S, Piolti R, Ferrarese C, et al: Clinical, neuropsychological, and morphometric correlates of apathy in Parkinson's disease. Movement Disorders. 2002, 17 (2): 366-71. 10.1002/mds.10041.CrossRefPubMed
23.
go back to reference McPherson S, Fairbanks L, Tiken S, Cummings JL, Back-Madruga C: Apathy and executive function in Alzheimer's disease. J Int Neuropsychol Soc. 2002, 8 (3): 373-81. 10.1017/S1355617702813182.CrossRefPubMed McPherson S, Fairbanks L, Tiken S, Cummings JL, Back-Madruga C: Apathy and executive function in Alzheimer's disease. J Int Neuropsychol Soc. 2002, 8 (3): 373-81. 10.1017/S1355617702813182.CrossRefPubMed
24.
go back to reference Zgaljardic DJ, Borod JC, Foldi NS, Rocco M, Mattis PJ, Gordon MF, et al: Relationship between self-reported apathy and executive dysfunction in nondemented patients with Parkinson disease. Cogn Behav Neurol. 2007, 20 (3): 184-92. 10.1097/WNN.0b013e318145a6f6.CrossRefPubMedPubMedCentral Zgaljardic DJ, Borod JC, Foldi NS, Rocco M, Mattis PJ, Gordon MF, et al: Relationship between self-reported apathy and executive dysfunction in nondemented patients with Parkinson disease. Cogn Behav Neurol. 2007, 20 (3): 184-92. 10.1097/WNN.0b013e318145a6f6.CrossRefPubMedPubMedCentral
25.
go back to reference WHO Colloborating Centre for Drug Statistics Methodolegy: 2008, ATC Index with DDD's. Oslo WHO Colloborating Centre for Drug Statistics Methodolegy: 2008, ATC Index with DDD's. Oslo
26.
go back to reference Marin RS, Biedrzycki RC, Firinciogullari S: Reliability and validity of the Apathy Evaluation Scale. Psychiatry Res. 1991, 38 (2): 143-62. 10.1016/0165-1781(91)90040-V.CrossRefPubMed Marin RS, Biedrzycki RC, Firinciogullari S: Reliability and validity of the Apathy Evaluation Scale. Psychiatry Res. 1991, 38 (2): 143-62. 10.1016/0165-1781(91)90040-V.CrossRefPubMed
27.
go back to reference Faerden A, Nesvag R, Barrett EA, Agartz I, Finset A, Friis S, et al: Assessing apathy: the use of the Apathy Evaluation Scale in first episode psychosis. Eur Psychiatry. 2008, 23 (1): 33-9. 10.1016/j.eurpsy.2007.09.002.CrossRefPubMed Faerden A, Nesvag R, Barrett EA, Agartz I, Finset A, Friis S, et al: Assessing apathy: the use of the Apathy Evaluation Scale in first episode psychosis. Eur Psychiatry. 2008, 23 (1): 33-9. 10.1016/j.eurpsy.2007.09.002.CrossRefPubMed
28.
go back to reference Kay SR, Fiszbein AOL: The positive and negative syndrome Scale (PANSS) for schizophrenia. Schizophr Bull. 1987, 16: 261-76.CrossRef Kay SR, Fiszbein AOL: The positive and negative syndrome Scale (PANSS) for schizophrenia. Schizophr Bull. 1987, 16: 261-76.CrossRef
29.
go back to reference Addington D, Addington J, Maticka-Tyndale E, Joyce J: Reliability and validity of a depression rating scale for schizophrenics. Schizophr Res. 1992, 6 (3): 201-8. 10.1016/0920-9964(92)90003-N.CrossRefPubMed Addington D, Addington J, Maticka-Tyndale E, Joyce J: Reliability and validity of a depression rating scale for schizophrenics. Schizophr Res. 1992, 6 (3): 201-8. 10.1016/0920-9964(92)90003-N.CrossRefPubMed
30.
go back to reference American Psychiatric Association: Diagnostic and Statistical Manual of Mental Disorders DSM IV. 1994, Washington DC: American Psychiatric Association, 4 American Psychiatric Association: Diagnostic and Statistical Manual of Mental Disorders DSM IV. 1994, Washington DC: American Psychiatric Association, 4
31.
go back to reference Heinrichs RW, Zakzanis KK: Neurocognitive deficit in schizophrenia: a quantitative review of the evidence. Neuropsychology. 1998, 12 (3): 426-45. 10.1037/0894-4105.12.3.426.CrossRefPubMed Heinrichs RW, Zakzanis KK: Neurocognitive deficit in schizophrenia: a quantitative review of the evidence. Neuropsychology. 1998, 12 (3): 426-45. 10.1037/0894-4105.12.3.426.CrossRefPubMed
32.
go back to reference Green MF, Nuechterlein KH, Gold JM, Barch DM, Cohen J, Essock S, et al: Approaching a consensus cognitive battery for clinical trials in schizophrenia: the NIMH-MATRICS conference to select cognitive domains and test criteria 4203. Biol Psychiatry. 56 (5): 301-7. 10.1016/j.biopsych.2004.06.023. Green MF, Nuechterlein KH, Gold JM, Barch DM, Cohen J, Essock S, et al: Approaching a consensus cognitive battery for clinical trials in schizophrenia: the NIMH-MATRICS conference to select cognitive domains and test criteria 4203. Biol Psychiatry. 56 (5): 301-7. 10.1016/j.biopsych.2004.06.023.
33.
go back to reference Matthews CG, Kløve H: Instruction Manual for the Adult Neuropsycholology Test battery. 1964, Madison, Wisconsin: University of Wisconsin Medical School Matthews CG, Kløve H: Instruction Manual for the Adult Neuropsycholology Test battery. 1964, Madison, Wisconsin: University of Wisconsin Medical School
34.
go back to reference David Wechsler: WAIS III. Wechsler Adult Intelligence Scale. Manual. 1997, The Psychological Corporation David Wechsler: WAIS III. Wechsler Adult Intelligence Scale. Manual. 1997, The Psychological Corporation
35.
go back to reference Delis D, Kramer JK, Kaplan E, Ober BA: CVLT-II. California verbal learning Test. Manual. Adult version. 2000, The Psychological Corporation. Harcourt Assessment Company, Second Delis D, Kramer JK, Kaplan E, Ober BA: CVLT-II. California verbal learning Test. Manual. Adult version. 2000, The Psychological Corporation. Harcourt Assessment Company, Second
36.
go back to reference Meyers J, Meyers KE: Rey Complex Figure tests and Recognition Trial. Professional Manual. 1995, Psychological Assessment Resources. Inc Meyers J, Meyers KE: Rey Complex Figure tests and Recognition Trial. Professional Manual. 1995, Psychological Assessment Resources. Inc
37.
go back to reference Delis D, Kaplan E, Kramer JK: Delis-Kaplan Executive Function System. Examiner's Manual. 2001, San Antonio, Texas: The Psychological Corporation; Harcourt Assessment Company Delis D, Kaplan E, Kramer JK: Delis-Kaplan Executive Function System. Examiner's Manual. 2001, San Antonio, Texas: The Psychological Corporation; Harcourt Assessment Company
38.
go back to reference Vaskinn A, Sundet K: Estimating premorbid IQ: A Norwegian version of National Adult Reading Test. J Nor Psychol Assoc. 2001, 38: 1133-40. Vaskinn A, Sundet K: Estimating premorbid IQ: A Norwegian version of National Adult Reading Test. J Nor Psychol Assoc. 2001, 38: 1133-40.
39.
go back to reference Psychological Corporation: WASI. Wechsler Abbreviated Scale of Intelligence. Manual. 1999, San Antonio. TX: The Psychological Corporation Psychological Corporation: WASI. Wechsler Abbreviated Scale of Intelligence. Manual. 1999, San Antonio. TX: The Psychological Corporation
40.
go back to reference Andersson S, Krogstad JM, Finset A: Apathy and depressed mood in aquired brain damage: relationship to lesion localization and psychophysiological reaction. Psychol Med. 1999, 29 (2): 447-56. 10.1017/S0033291798008046.CrossRefPubMed Andersson S, Krogstad JM, Finset A: Apathy and depressed mood in aquired brain damage: relationship to lesion localization and psychophysiological reaction. Psychol Med. 1999, 29 (2): 447-56. 10.1017/S0033291798008046.CrossRefPubMed
41.
go back to reference Ventura J, Liberman RP, Green MF, Shaner A, Mintz J: Training and quality assurance with the Structured Clinical Interview for DSM-IV (SCID-I/P). Psychiatry Res. 79 (2): 163-73. 10.1016/S0165-1781(98)00038-9. Ventura J, Liberman RP, Green MF, Shaner A, Mintz J: Training and quality assurance with the Structured Clinical Interview for DSM-IV (SCID-I/P). Psychiatry Res. 79 (2): 163-73. 10.1016/S0165-1781(98)00038-9.
42.
go back to reference Carpenter WT, Heinrichs DW, Wagman AM: Deficiet and nondeficiet forms of schizophrenia:the concept. Am J Psychiatry. 1988, 145: 578-83.CrossRefPubMed Carpenter WT, Heinrichs DW, Wagman AM: Deficiet and nondeficiet forms of schizophrenia:the concept. Am J Psychiatry. 1988, 145: 578-83.CrossRefPubMed
43.
go back to reference Szeszko PR, Bilder RM, Lencz T, Ashtari M, Goldman RS, Reiter G, et al: Reduced anterior cingulate gyrus volume correlates with executive dysfunction in men with first-episode schizophrenia. Schizophr Res. 43 (2–3): 97-108. Szeszko PR, Bilder RM, Lencz T, Ashtari M, Goldman RS, Reiter G, et al: Reduced anterior cingulate gyrus volume correlates with executive dysfunction in men with first-episode schizophrenia. Schizophr Res. 43 (2–3): 97-108.
44.
go back to reference Marshall GA, Monserratt L, Harwood D, Mandelkern M, Cummings JL, Sultzer DL: Positron emission tomography metabolic correlates of apathy in Alzheimer disease. Arch Neurol. 2007, 64 (7): 1015-20. 10.1001/archneur.64.7.1015.CrossRefPubMed Marshall GA, Monserratt L, Harwood D, Mandelkern M, Cummings JL, Sultzer DL: Positron emission tomography metabolic correlates of apathy in Alzheimer disease. Arch Neurol. 2007, 64 (7): 1015-20. 10.1001/archneur.64.7.1015.CrossRefPubMed
45.
go back to reference Rusch N, Spoletini I, Wilke M, Bria P, Di PM, Di IF, et al: Prefrontal-thalamic-cerebellar gray matter networks and executive functioning in schizophrenia. Schizophr Res. 2007, 93 (1–3): 79-89. 10.1016/j.schres.2007.01.029.CrossRefPubMed Rusch N, Spoletini I, Wilke M, Bria P, Di PM, Di IF, et al: Prefrontal-thalamic-cerebellar gray matter networks and executive functioning in schizophrenia. Schizophr Res. 2007, 93 (1–3): 79-89. 10.1016/j.schres.2007.01.029.CrossRefPubMed
46.
go back to reference Lavretsky H, Ballmaier M, Pham D, Toga A, Kumar A: Neuroanatomical characteristics of geriatric apathy and depression: a magnetic resonance imaging study. Am J Geriatr Psychiatry. 2007, 15 (5): 386-94. 10.1097/JGP.0b013e3180325a16.CrossRefPubMedPubMedCentral Lavretsky H, Ballmaier M, Pham D, Toga A, Kumar A: Neuroanatomical characteristics of geriatric apathy and depression: a magnetic resonance imaging study. Am J Geriatr Psychiatry. 2007, 15 (5): 386-94. 10.1097/JGP.0b013e3180325a16.CrossRefPubMedPubMedCentral
47.
go back to reference Migneco O, Benoit M, Koulibaly PM, Dygai I, Bertogliati C, Desvignes P, et al: Perfusion brain SPECT and statistical parametric mapping analysis indicate that apathy is a cingulate syndrome: a study in Alzheimer's disease and nondemented patients. Neuroimage. 2001, 13 (5): 896-902. 10.1006/nimg.2000.0741.CrossRefPubMed Migneco O, Benoit M, Koulibaly PM, Dygai I, Bertogliati C, Desvignes P, et al: Perfusion brain SPECT and statistical parametric mapping analysis indicate that apathy is a cingulate syndrome: a study in Alzheimer's disease and nondemented patients. Neuroimage. 2001, 13 (5): 896-902. 10.1006/nimg.2000.0741.CrossRefPubMed
Metadata
Title
Apathy is associated with executive functioning in first episode psychosis
Authors
Ann Faerden
Anja Vaskinn
Arnstein Finset
Ingrid Agartz
Elizabeth Ann Barrett
Svein Friis
Carmen Simonsen
Ole A Andreassen
Ingrid Melle
Publication date
01-12-2009
Publisher
BioMed Central
Published in
BMC Psychiatry / Issue 1/2009
Electronic ISSN: 1471-244X
DOI
https://doi.org/10.1186/1471-244X-9-1

Other articles of this Issue 1/2009

BMC Psychiatry 1/2009 Go to the issue