Location of Repository

The simulation of action disorganisation in complex activities of daily living

By Richard P. Cooper, M.F. Schwartz, P. Yule and T. Shallice


Action selection in everyday goal-directed tasks of moderate complexity is known to be subject to breakdown following extensive frontal brain injury. A model of action selection in such tasks is presented and used to explore three hypotheses concerning the origins of action disorganisation: that it is a consequence of reduced top-down excitation within a hierarchical action schema network coupled with increased bottom-up triggering of schemas from environmental sources, that it is a more general disturbance of schema activation modelled by excessive noise in the schema network, and that it results from a general disturbance of the triggering of schemas by object representations. Results suggest that the action disorganisation syndrome is best accounted for by a general disturbance to schema activation, while altering the balance between top-down and bottom-up activation provides an account of a related disorder - utilisation behaviour. It is further suggested that ideational apraxia (which may result from lesions to left temporoparietal areas and which has similar behavioural consequences to action disorganisation syndrome on tasks of moderate complexity) is a consequence of a generalised disturbance of the triggering of schemas by object representations. Several predictions regarding differences between action disorganisation syndrome and ideational apraxia that follow from this interpretation are detailed

Topics: psyc
Publisher: Taylor and Francis
Year: 2005
OAI identifier: oai:eprints.bbk.ac.uk.oai2:544

Suggested articles



  1. (1996). 1587–1598. Simulating Action Disorganisation
  2. (2001). A computational model of action selection in the basal ganglia. I. A new functional anatomy. doi
  3. (2001). A computational model of action selection in the basal ganglia. II. Analysis and simulation of behaviour. doi
  4. (2001). A form of ideational apraxia as a selective deficit of contention scheduling. doi
  5. (1997). A hierarchical neuronal network for planning behavior. doi
  6. (1995). A multidisciplinary approach to anterior attentional functions. doi
  7. (1993). A unified account of cognitive impairments following frontal lobe damage: The role of working memory in complex, organized behavior. doi
  8. (1979). Actions not as planned: The price of automatization
  9. (1995). Analysis of a disorder of everyday action. doi
  10. (1980). Attention to action: Willed and automatic control of behavior. Chip report 99,
  11. (1986). Attention to action: Willed and automatic control of behavior. In
  12. (1995). Attention, intelligence, and the frontal lobes.
  13. (1981). Categorization of action slips. doi
  14. (2000). Contention Scheduling and the control of routine activities. doi
  15. (1980). Das syndrom der ideatorischen apraxie und seine localisation.
  16. (1993). Deep dyslexia: A case study of connectionist neuropsychology. doi
  17. (2000). Discreteness and interactivity in spoken word production. doi
  18. (1998). Disordered action schema and action disorganisation syndrome. doi
  19. (1986). Disorganisation of behaviour after frontal lobe damage. doi
  20. (2002). Dissociations in routine behaviour across patients and everyday tasks. doi
  21. (2004). Doing without schema hierarchies: A recurrent connectionist approach to normal and impaired routine sequential action. doi
  22. (1996). Encoding of sequence and boundaries of scripts following prefrontal lesions. doi
  23. (2003). Express: A web-based technology to support human and computational experimentation. doi
  24. (1995). Fluid intelligence after frontal lobe lesions. doi
  25. (2002). Fractionation of the supervisory system. doi
  26. (1988). From Neuropsychology to Mental Structure. doi
  27. (2003). From vision to action, and action to vision: A convergent route approach to vision, action and attention. doi
  28. (1995). Gradient-based learning algorithms for recurrent networks and their computational complexity.
  29. (1966). Higher Cortical Functions in Man. London: Tavistock. Simulating Action Disorganisation McClelland,
  30. (1949). Human Behaviour and the Principle of Least Effort. doi
  31. (1990). Human Error. doi
  32. (1998). Ideational apraxia and naturalistic action. doi
  33. (1991). Lesioning an attractor network: Investigations of acquired dyslexia. doi
  34. (1997). Modelling the selection of routine action: Exploring the criticality of parameter values.
  35. (1998). Naturalistic action impairment in Closed Head Injury. doi
  36. (2002). Naturalistic action impairments in dementia. doi
  37. (1999). Naturalistic action production following right hemisphere stroke. doi
  38. (2002). Order and disorder in everyday action: the roles of contention scheduling and supervisory attention. doi
  39. (1989). Plans, actions, and mental sets: Managerial Knowledge Units in the frontal lobes.
  40. (1995). Re-examining the role of executive functions in routine action production. doi
  41. (2002). Representing task context: Proposals based on a connectionist model of action. doi
  42. (1995). Similarities and distinctions among current models of prefrontal cortical functions. doi
  43. (1997). Simulating Action Disorganisation doi
  44. (1994). Spelling and serial recall: Insights from a competitive queuing model.
  45. (1905). Studien űber Motorische Apraxie und ihr Nahestehende Erscheinungen: doi
  46. (1985). Supplementary motor area structure and function: Review and hypotheses. doi
  47. (1995). Symbolic and continuous processes in the automatic selection of actions.
  48. (1998). The Atomic Components of Thought. Lawrence Erlbaum Associates. doi
  49. (1999). The basal ganglia: a vertebrate solution to the selection problem? doi
  50. (1996). The domain of supervisory processes and temporal organisation of behaviour. doi
  51. (1993). The frontal lobes and voluntary action.
  52. (2000). The organisation of sequential actions.
  53. (1989). The origins of utilisation behaviour. doi
  54. (1997). The Prefrontal Cortex (3 rd edition). doi
  55. (1997). The Prefrontal Cortex (3rd edition). doi
  56. (1990). The problem of serial order: A neural network model of sequence learning and recall. In
  57. (1991). The quantitative description of action disorganisation after brain damage: A case study. doi
  58. (2000). The role of semantic knowledge and working memory in everyday tasks. doi
  59. (1997). The role of semantic memory in object use. doi
  60. (1992). Toward a theory of information processing in graded, random, interactive networks.
  61. (2001). Towards a technology for computational experimentation.
  62. (1996). Understanding normal and impaired word reading: Computational principles in quasi-regular domains. doi
  63. (1983). Utilisation behaviour and its relation to lesions of the frontal lobes. doi
  64. (2002). Utilisation behaviour consequent to bilateral SMA softening. doi
  65. (1992). Working memory and the mind. doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.