Skip to main content Accessibility help
×
Hostname: page-component-7479d7b7d-767nl Total loading time: 0 Render date: 2024-07-08T05:45:49.311Z Has data issue: false hasContentIssue false

11 - Cognitive neurobiology of volition and agency in schizophrenia

from Part V - Consciousness and will

Published online by Cambridge University Press:  19 January 2010

Sean A Spence
Affiliation:
University of Sheffield, Sheffield, UK
Maria A. Ron
Affiliation:
Institute of Neurology, London
Trevor W. Robbins
Affiliation:
University of Cambridge
Get access

Summary

Introduction

Since its initial description, schizophrenia has been known to affect volition: voluntary movement (Kraepelin 1919; Zec 1995; McKenna et al. 1998). But such abnormality is not restricted to the way that a movement is performed, it also affects its purpose. Patients may do things abnormally – they may also choose to do abnormal things. In this chapter we address the neural substrates of disordered action performance and the disturbed sense of agency that may occur in some patients with this disabling condition.

Volition and will

Volition encompasses a spectrum of voluntary behaviours and some of these (‘willed’, ‘intended’ or ‘freely chosen’) seem to us to be quintessentially human. The ‘will’ refers to our capacity to choose. We may ‘choose’ to ‘control’ some of our involuntary impulses. We may choose to attend to one stream of competing information over another. We may initiate conversations, many of which may be structurally unique and unpredictable. We may create a sequence for performing even the most mundane tasks. What we choose to do is an ‘action’; the one who chooses it is an ‘agent’ (Macmurray 1991). One influential theory characterized schizophrenia as a ‘disorder of action’ (Frith 1987). By making action central to schizophrenia, Frith's early theory made the latter a disorder of higher volition – of that which is willed (or chosen) over that which is automatic (Frith 1987; Liddle 1993; see Chapter 10 by Frith). Frith's theories have undergone changes and he currently uses ‘action’ to refer to all movements.

Type
Chapter
Information
Publisher: Cambridge University Press
Print publication year: 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Alexander, G E, DeLong, M R and Strick, P L (1986). Parallel organization of functionally segregated circuits linking basal ganglia and cortex. Ann Rev Neurosci, 9, 357–81Google Scholar
Amin, F, Silverman, J M, Siever, L J, Smith, C J, Knott, P S and Davis, K L (1999). Genetic antecedents of dopamine dysfunction in schizophrenia. Biol Psychiatry, 45, 1143–50CrossRefGoogle Scholar
Andreasen, N C (1999). A unitary model of schizophrenia. Bleuler's ‘fragmented phrene’ as schizoencephaly. Arch Gen Psychiatry, 56, 781–7CrossRefGoogle Scholar
Angyal, A (1936). The experience of the body-self in schizophrenia. Arch Neurol Psychiatry, 35, 1029–53CrossRefGoogle Scholar
Banati, R B, Goerres, G W, Tjoa, C, Aggleton, J P and Grasby, P (2000). The functional anatomy of visual-tactile integration in man: a study using positron emission tomography. Neuropsychologia, 38, 115–24CrossRefGoogle Scholar
Barnes T R E and Spence S A (2000). Movement disorders associated with antipsychotic drugs: clinical and biological implications. In The Psychopharmacology of Schizophrenia, ed. M A Reveley and J F W Deakin, pp. 178–210. London: Hodder
Barrett, K (1999). Treating organic abulia with bromocriptine and lisuride: four case studies. J Neurol Neurosurg Psychiatry, 54, 718–21CrossRefGoogle Scholar
Berman, K F, Zec, R F and Weinberger, D R (1986). Physiologic dysfunction of dorsolateral prefrontal cortex in schizophrenia. II. Role of neuroleptic treatment, attention and mental effort. Arch Gen Psychiatry, 43, 126–35Google Scholar
Berman, K F, Fuller Torrey, E, Daniel, D G and Weinberger, D R (1992). Regional cerebral blood flow in monozygotic twins discordant and concordant for schizophrenia. Arch Gen Psychiatry, 49, 927–34Google Scholar
Berman, K F, Ostrem, J L, Randolph, C et al. (1995). Physiological activation of a cortical network during performance of the Wisconsin Card Sorting Test: a positron emission tomography study. Neuropsychologia, 33, 1027–46Google Scholar
Berrios G E and Gili M (1998). Disorders of the volition and the will: a conceptual history. In Disorders of Volition and Action in Psychiatry, ed. C Williams and A Sims, pp. 9–29. Leeds: Leeds University Press
Bertolino, A, Callicott, J H, Elman, I et al. (2000). The effects of treatment with antipsychotics on N-acetylaspartate measures in patients with schizophrenia. Schizophr Res, 41, 219Google Scholar
Binkofski, F, Dohle, C, Posse, S et al. (1998). Human anterior intraparietal area subserves prehension. Neurology, 50, 1253–9CrossRefGoogle Scholar
Bisiach, E, Rusconi, M L and Vallar, G (1991). Remission of somatoparaphrenic delusion through vestibular stimulation. Neuropsychologia, 29, 1029–31CrossRefGoogle Scholar
Blakemore, S-J, Smith, J, Steel, R, Johnstone, E C and Frith, C D (2000). The perception of self-produced sensory stimuli in patients with auditory hallucinations and passivity experiences: evidence for a breakdown in self-monitoring. Psychol Med, 30, 1131–9CrossRefGoogle Scholar
Bottini, G, Karnath, H-O, Vallar, G et al. (2001). Cerebral representations for egocentric space: functional-anatomical evidence from caloric vestibular stimulation and neck vibration. Brain, 124, 1182–96CrossRefGoogle Scholar
Brugger P. (in press). From haunted brain to haunted science: a cognitive neuroscience view of paranormal and pseudoscientific thought. In Spirited Exchanges: Multidisciplinary Perspectives on Hauntings and Poltergeists, ed. J Houran and R Lange. Jefferson, NC: McFarland
Bush, G, Luu, P and Posner, M I (2000). Cognitive and emotional influences in anterior cingulate cortex. Trends Cogn Sci, 4, 215–22CrossRefGoogle Scholar
Chiarenza, G A, Papakostopoulos, , Dini, M and Cazzullo, C L (1985). Neurophysiological correlates of psychomotor activity in chronic schizophrenics. Electroencephal Clin Neurophysiol, 61, 218–28CrossRefGoogle Scholar
Chua, S E and McKenna, P J (1995). Schizophrenia – a brain disease? A critical review of structural and functional cerebral abnormality in the disorder. Br J Psychiatry, 166, 563–82CrossRefGoogle Scholar
Chua, S E, Wright, I C, Poline, J-B et al. (1997). Grey matter correlates of syndromes in schizophrenia. A semi-automated analysis of structural magnetic resonance images. Br J Psychiatry, 170, 406–10Google Scholar
Critchley M (1953). The Parietal Lobes. New York: Hafner Press
Curtis, V A, Bullmore, E T, Morris, R G et al. (1999). Attenuated frontal activation in schizophrenia may be task dependent. Schizophr Res, 37, 35–44CrossRefGoogle Scholar
Cutting, J (1989). Body image disorders: comparison between unilateral hemisphere damage and schizophrenia. Behav Neurol, 2, 201–10CrossRefGoogle Scholar
Daprati, E, Franck, N, Georgieff, N et al. (1997). Looking for the agent: an investigation into consciousness of action and self-consciousness in schizophrenic patients. Cognition, 65, 71–86Google Scholar
Desmond, J E, Gabrieli, J D E and Glover, G H (1998). Dissociation of frontal and cerebellar activity in a cognitive task: evidence for a distinction between selection and search. Neuroimage, 7, 368–76CrossRefGoogle Scholar
Dilman I (1999). Free Will: An Historical and Philosophical Introduction. London: Routledge
Dolan, R J, Bench, C J, Liddle, P F and Friston, K J (1993). Dorsolateral prefrontal cortex dysfunction in the major psychoses; symptom or disease specificity?J Neurol Neurosurg Psychiatry, 56, 1290–4Google Scholar
Dreher, J-C, Trapp, W, Banquet, J-P, Keil, M, Guenther, W and Burnod, Y (1999). Planning dysfunction in schizophrenia: impairment of potentials preceding fixed/free and single/sequence of self-initiated finger movements. Exp Brain Res, 124, 200–14CrossRefGoogle Scholar
Duncan, J and Owen, A M (2000). Common regions of the human frontal lobe recruited by diverse cognitive demands. Trends Neurosci, 23, 475–83Google Scholar
Dye, S M, Spence, S A, Bench, C J et al. (1999). No evidence for left superior temporal dysfunction in asymptomatic schizophrenia and bipolar affective disorder. PET study of verbal fluency. Br J Psychiatry, 175, 367–74Google Scholar
Ebmeier, K P, Blackwood, D H R, Murray, C and Souza, V (1993). Single photon emission tomography with 99m Tc-exametazine in unmedicated schizophrenic patients. Biol Psychiatry, 487–95CrossRefGoogle Scholar
Eidelberg, D and Galaburda, A M (1984). Inferior parietal lobule: divergent architectonic asymmetries in the human brain. Arch Neurol, 41, 843–52CrossRefGoogle Scholar
Fish, B, Marcus, J, Hans, S L, Auerbach, J G and Perdue, S (1992). Infants at risk for schizophrenia: sequelae of a genetic neurointegrative defect. A review and replication analysis of pandysmaturation in the Jerusalem infant development study. Arch Gen Psychiatry, 49, 221–35Google Scholar
Flashman, L A, Flaum, M, Gupta, S and Andreasen, N C (1996). Soft signs and neurophysiological performance in schizophrenia. Am J Psychiatry, 153, 526–32CrossRefGoogle Scholar
Fletcher P C, Frith C D, Grasby P M et al (1996). Local and distributed effects of apomorphine upon fronto-temporal function in acute unmedicated schizophrenia. J Neurosci, 16, 7055–62CrossRef
Fletcher, P C, McKenna, P J, Frith, C D, Grasby, P M, Friston, K J and Dolan, R J (1998). Brain activations in schizophrenia during a graded memory task studied with functional imaging. Arch Gen Psychiatry, 55, 1001–8CrossRefGoogle Scholar
Franck, N, Farrer, C, Georgieff, N et al. (2001). Defective recognition of one's own actions in patients with schizophrenia. Am J Psychiatry, 158, 454–9CrossRefGoogle Scholar
Friston, K J (1996). Theoretical neurobiology and schizophrenia. Br Med Bull, 52, 644–55CrossRefGoogle Scholar
Friston K J, Herold S, Fletcher P et al. (1995). Abnormal fronto-temporal interactions in schizophrenia. In Biology of Schizophrenia and Affective Diseases, ed. S J Watson, pp. 449–81. New York: Raven Press
Frith, C D (1987). The positive and negative symptoms of schizophrenia reflect impairment in the perception and initiation of action. Psychol Med, 17, 631–48CrossRefGoogle Scholar
Frith, C D (1996). Commentary on ‘Free will in the light of neuropsychiatry’. Philos Psychiatry Psychol, 3, 91–4CrossRefGoogle Scholar
Frith, C D and Done, D J (1989). Experiences of alien control in schizophrenia reflect a disorder in the central monitoring of action. Psychol Med, 19, 359–63CrossRefGoogle Scholar
Frith, C D, Friston, K, Liddle, P F and Frackowiak, R S J (1991 a). Willed action and the prefrontal cortex in man: a study with PET. Proc R Soc Lond, 244, 241–6Google Scholar
Frith, C D, Friston, K, Liddle, P F and Frackowiak, R S J (1991 b). A PET study of word finding. Neuropsychologia, 29, 1137–48Google Scholar
Frith, C D, Friston, K J, Herold, S et al. (1995). Regional brain activity in schizophrenic patients during the performance of a verbal fluency task. Br J Psychiatry, 167, 343–9CrossRefGoogle Scholar
Fuster J M (1980). The Prefrontal Cortex. New York: Raven Press
Gehring, W J and Knight, R T (2000). Prefrontal-cingulate interactions in action monitoring. Nat Neurosci, 3, 516–20CrossRefGoogle Scholar
Goldberg, T E, Berman, K F, Fleming, K et al. (1998). Uncoupling cognitive workload and prefrontal cortical physiology: a PET rCBF study. Neuroimage, 7, 296–303CrossRefGoogle Scholar
Goldman-Rakic, P S and Selemon, L D (1997). Functional and anatomical aspects of prefrontal pathology in schizophrenia. Schizophr Bull, 23, 437–58CrossRefGoogle Scholar
Guenther, W, Brodie, J D, Bartlett, E J and Dewey, S L (1994). Diminished cerebral metabolic response to motor stimulation in schizophrenics: a PET study. Eur Arch Psychiatry Clin Neurosci, 244, 115–25CrossRefGoogle Scholar
Harrington, D L, Haaland, K Y and Knight, R T (1998). Cortical networks underlying mechanisms of time perception. J Neurosci, 18, 1085–95CrossRefGoogle Scholar
Honey, G D, Bullmore, E T, Soni, W, Varatheesan, M, Williams, S C and Sharma, T (1999). Differences in frontal cortical activation by a working memory task after substitution of risperidone for typical antipsychotic drugs in patients with schizophrenia. Proc Natl Acad Sci USA, 96, 13432–7CrossRefGoogle Scholar
Ingvar, D H (1994). The will of the brain: cerebral correlates of wilful acts. J Theoret Biol, 171, 7–12CrossRefGoogle Scholar
Jahanshahi, M, Dirnberger, G, Fuller, R and Frith, C (1997). The functional anatomy of random number generation studied with PET. J Cereb Blood Flow Metab, 17, S643Google Scholar
Jahanshahi, M, Profice, P, Brown, R G, Riddin, M C, Dirnberger, G and Rothwell, J C (1998). The effects of transcranial magnetic stimulation over the dorsolateral prefrontal cortex on suppression of habitual counting during random number generation. Brain, 121, 1533–44CrossRefGoogle Scholar
Jeannerod M (1997). The Cognitive Neuroscience of Action. Oxford: Blackwell
Joyce, E M, Collinson, S L and Crichton, P (1996). Verbal fluency in schizophrenia: relationship with executive function, semantic memory and clinical alogia. Psychol Med, 26, 39–49CrossRefGoogle Scholar
Karaman, T, Ozkaynak, S, Yaltkaya, K and Bueyuekberker, C (1997). Bereitschaftpotential in schizophrenia. Br J Psychiatry, 171, 31–4CrossRefGoogle Scholar
Knight, R T, Staines, W R, Swick, D and Chao, L L (1999). Prefrontal cortex regulates inhibition and excitation in distributed neural networks. Acta Psychol, 101, 159–78CrossRefGoogle Scholar
Kotrla, K J, Mattay, V S, Nawroz, S and Gelderen, P (1995). Primary sensorimotor cortex activation in patients with schizophrenia: a 3-D echo-shifted (ES) flash fMRI study. J Cereb Blood Flow Metab, 15, S95Google Scholar
Kraepelin E (1919). Dementia Praecox and Paraphrenia. (Translated by R M Barclay.) Edinburgh: Livingstone
Leiguarda, R, Starkstein, S, Nogues, M and Berthier, M (1993). Paroxysmal alien hand syndrome. J Neurol Neurosurg Psychiatry, 56, 788–92CrossRefGoogle Scholar
Libet, B (1996). Commentary on ‘Free will in the light of neuropsychiatry’. Philos Psychiatry Psychol, 3, 95–6CrossRefGoogle Scholar
Libet, B, Gleason, C A, Wright, E W and Pearl, D K (1983). Time of conscious intention to act in relation to onset of cerebral activity (readiness potential): the unconscious initiation of a freely voluntary act. Brain, 106, 623–42CrossRefGoogle Scholar
Libet B, Freeman A and Sutherland K (ed.) (1999). The Volitional Brain: Towards a Neuroscience of Free Will. Exeter: Imprint Academic
Liddle, P F (1993). The psychomotor disorders: disorders of the supervisory mental processes. Behav Neurol, 6, 5–14CrossRefGoogle Scholar
Liddle, P, Friston, K J, Frith, C D, Hirsch, S R, Jones, T and Frackowiak, R S J (1992). Patterns of cerebral blood flow in schizophrenia. Br J Psychiatry, 160, 179–86CrossRefGoogle Scholar
Loftus, J, DeLisi, L E and Crow, T J (2000). Factor structure and familiality of first-rank symptoms in sibling pairs with schizophrenia and schizoaffective disorder. Br J Psychiatry, 177, 15–19CrossRefGoogle Scholar
Luria A R (1966). Higher Cortical Functions in Man. London: Tavistock
Macmurray J (1991). The Self as Agent. London: Faber & Faber. (First published 1957.)
Manschreck T C (1986). Motor abnormalities in schizophrenia. In Handbook of Schizophrenia, Vol. 1, ed. H A Nasrallah and D R Weinberger, pp. 65–96. Amsterdam: Elsevier
Maruff, P and Currie, J. (in press). Abnormalities of motor imagery associated with somatic passivity phenomena in schizophrenia. Schizophr Res, in press
Masterman, D L and Cummings, J L (1997). Frontal-subcortical circuits: the anatomic basis of executive, social and motivated behaviours. J Psychopharmacol, 11, 107–14CrossRefGoogle Scholar
Mattingley, J B, Husain, M, Rorden, C, Kennard, C and Driver, J (1998). Motor role of human inferior parietal lobe revealed in unilateral neglect patients. Nature, 392, 179–82CrossRefGoogle Scholar
McGuire, P K, Silbersweig, D A, Wright, I and Murray, R M (1995). Abnormal monitoring of inner speech: a physiological basis for auditory hallucinations. Lancet, 346, 596–600CrossRefGoogle Scholar
McGuire, P K, Quested, D J, Spence, S A, Murray, R M, Frith, C D and Liddle, P F (1998). Pathophysiology of ‘positive’ thought disorder in schizophrenia. Br J Psychiatry, 173, 231–5CrossRefGoogle Scholar
McKenna P J, Thornton A and Turner M (1998). Catatonia inside and outside schizophrenia. In Disorders of Volition and Action in Psychiatry, ed. C Williams and A Sims, pp. 105–35. Leeds: Leeds University Press,
Mlakar, J, Jensterle, J and Frith, C D (1994). Central monitoring deficiency and schizophrenic symptoms. Psychol Med, 24, 557–64CrossRefGoogle Scholar
Mortimer A and Spence S (2001). Managing Negative Symptoms of Schizophrenia. London: Science Press
Neumann, C S and Walker, E F (1999). Motor dysfunction in schizotypal personality disorder. Schizophr Res, 38, 159–68CrossRefGoogle Scholar
Nightingale, S (1982). Somatoparaphrenia: a case report. Cortex, 18, 463–7CrossRefGoogle Scholar
O'Shaughnessy B (1998). Contemporary philosophical thinking on the will. In Disorders of Volition and Action in Psychiatry, ed. C Williams and A Sims, pp. 40–50. Leeds: Leeds University Press
Passingham R (1993). The Frontal Lobes and Voluntary Action. Oxford: Oxford University Press
Passingham R E (1997). Functional organization of the motor system. In Human Brain Function, ed. R S J Frackowiak, K J Friston, C D Frith, R J Dolan and J C Mazziotta. San Diego: Academic Press
Perret, E (1974). The left frontal lobe of man and the suppression of habitual responses in verbal categorical behaviour. Neuropsychologia, 12, 323–30CrossRefGoogle Scholar
Puri, B K, Davey, N J, Ellaway, P H and Lewis, S W (1996). An investigation of motor function in schizophrenia using transcranial magnetic stimulation of the motor cortex. Br J Psychiatry, 169, 690–5CrossRefGoogle Scholar
Rogers, D (1985). The motor disorders of severe psychiatric illness: a conflict of paradigms. Br J Psychiatry, 147, 221–32CrossRefGoogle Scholar
Rogers, D (1991). Catatonia: a contemporary approach. J Neuropsychiatry, 3, 334–40CrossRefGoogle Scholar
Ruby, P and Decety, J (2001). Effect of subjective perspective taking during simulation of action: a PET investigation of agency. Nat Neurosci, 4, 546–50CrossRefGoogle Scholar
Rypma, B, Prabhakaran, V, Desmond, J E, Glover, G H and Gabrieli, J D E (1999). Load-dependent roles of frontal lobe regions in the maintenance of working memory. Neuroimage, 9, 216–26CrossRefGoogle Scholar
Schroder, J, Wenz, F, Schad, L R, Schroeder, and Baudendistel, K (1995). Sensorimotor cortex and supplementary motor area changes in schizophrenia. Br J Psychiatry, 167, 197–201CrossRefGoogle Scholar
Shallice, T and Burgess, P (1996). The domain of supervisory processes and temporal organization of behaviour. Philos Trans R Soc Lond B, 351, 1405–12CrossRefGoogle Scholar
Snyder, L H, Batista, A P and Andersen, R A (1997). Coding of intention in the posterior parietal cortex. Nature, 386, 167–70CrossRefGoogle Scholar
Spence, S A (1996 a). Free will in the light of neuropsychiatry. Philos Psychiatry Psychol, 3, 75–90Google Scholar
Spence, S A (1996 b). Response to the commentaries on ‘Free will in the light of neuropsychiatry’. Philos Psychiatry Psychol, 3, 99–100Google Scholar
Spence, S A (2001). Alien control: from phenomenology to cognitive neurobiology. Philos Psychiatry Psychol, 8, 163–72CrossRefGoogle Scholar
Spence, S A and Frith, C D (1999). Towards a functional anatomy of volition. J Consciousness Studies, 6, 11–28Google Scholar
Spence, S A, Liddle, P, Herold, S, Fletcher, P, Friston, K and Frith, C (1995). Medial frontal lobe overactivity in reality distortion syndrome during word generation: a PET study. Schizophr Res, 15, 99–100CrossRefGoogle Scholar
Spence, S A, Brooks, D J, Hirsch, S R, Liddle, P F, Meehan, J and Grasby, P M (1997). A PET study of voluntary movement in schizophrenic patients experiencing passivity phenomena (delusions of alien control). Brain, 120, 1997–2011CrossRefGoogle Scholar
Spence, S A, Hirsch, S R, Brooks, D J and Grasby, P M (1998). Prefrontal cortex activity in people with schizophrenia and control subjects. Evidence from positron emission tomography for remission of ‘hypofrontality’ with recovery from acute schizophrenia. Br J Psychiatry, 172, 316–23CrossRefGoogle Scholar
Spence, S A, Liddle, P F, Stefan, M D et al. (2000). Functional anatomy of verbal fluency in people with schizophrenia and those at genetic risk. Focal dysfunction and distributed disconnectivity reappraised. Br J Psychiatry, 176, 52–60Google Scholar
Stirling, J D, Hellewell, J S E and Quraishi, N (1998). Self-monitoring dysfunction and the schizophrenic symptoms of alien control. Psychol Med, 28, 675–83CrossRefGoogle Scholar
Tauscher, J, Fischer, P, Neumeister, A, Rappelsberger, P and Kasper, S (1998). Low frontal electroencephalographic coherence in neuroleptic-free schizophrenic patients. Biol Psychiatry, 44, 438–47CrossRefGoogle Scholar
Taylor P J (1998). Disorders of volition: forensic aspects. In Disorders of Volition and Action in Psychiatry, ed. C Williams and A Sims, pp. 66–84. Leeds: Leeds University Press
Walker, E F, Savoie, T and Davis, D (1994). Neuromotor precursors of schizophrenia. Schizophr Bull, 20, 441–51CrossRefGoogle Scholar
Weinberger, D R and Berman, K F (1996). Prefrontal function in schizophrenia: confounds and controversies. Philos Trans R Soc Lond B, 351, 1495–503CrossRefGoogle Scholar
Weinberger, D R, Berman, K F and Zec, R F (1986). Physiologic dysfunction of dorsolateral prefrontal cortex in schizophrenia. I. Regional cerebral blood flow evidence. Arch Gen Psychiatry, 114–24Google Scholar
Weinberger, D R, Berman, K F and Illowsky, B P (1988). Physiologic dysfunction of dorsolateral prefrontal cortex in schizophrenia. III. A new cohort and evidence for a monoaminergic mechanism. Arch Gen Psychiatry, 45, 609–15Google Scholar
Yang, C R, Seamans, J K and Gorelova, N (1999). Developing a neuronal model for the pathophysiology of schizophrenia based on the nature of electrophysiological action of dopamine in the prefrontal cortex. Neuropsychopharmacology, 21, 161–94CrossRefGoogle Scholar
Youngren, K D, Inglis, F M, Pivirotto, P J et al. (1999). Clozapine preferentially increases dopamine release in the rhesus monkey prefrontal cortex compared with the caudate nucleus. Neuropsychopharmacology, 20, 403–12CrossRefGoogle Scholar
Zec, R F (1995). Neuropsychology of schizophrenia according to Kraepelin: disorders of volition and executive functioning. Eur Arch Psychiatry Clin Neurosci, 245, 216–23CrossRefGoogle Scholar
Zubicaray, G I, Chalk, J B, Rose, S E, Rose, S E, Semple, J and Smith, G A (1997). Deficits on self ordered tasks associated with hyperostosis frontalis interna. J Neurol Neurosurg Psychiatry, 63, 309–14CrossRefGoogle Scholar
Zubicaray, G I, Williams, S C R, Wilson, S J et al. (1998). Prefrontal cortex involvement in selective letter generation: a functional magnetic resonance imaging study. Cortex, 34, 389–401CrossRefGoogle Scholar

Save book to Kindle

To save this book to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

Available formats
×