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Utilization behavior after lesions restricted to the frontal cortex.

Catherine Chapados1, Michael Petrides1

  • 1Cognitive Neuroscience Unit, Montreal Neurological Institute, McGill University, 3801 University, Montreal, Quebec, Canada, H3A 2B4; Department of Psychology, McGill University, 1205 Doctor Penfield Avenue, Montreal, Quebec, Canada, H3A 1B1.

Neuropsychologia
|June 24, 2014
PubMed
Summary
This summary is machine-generated.

Utilization behavior, previously linked to frontal cortex damage, was not observed in patients with isolated prefrontal cortex lesions. This suggests subcortical damage may be crucial for this neurological symptom.

Keywords:
Executive functionsFrontal cortexUtilization behavior

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Area of Science:

  • Neuroscience
  • Neurology
  • Cognitive Psychology

Background:

  • Utilization behavior, the tendency to use objects inappropriately without instruction, has been historically attributed to frontal lobe dysfunction.
  • Previous studies often reported utilization behavior in patients with extensive cerebral lesions, including significant subcortical damage, complicating the localization of this symptom.
  • The precise neural correlates of utilization behavior remain debated, with a need to differentiate the roles of the prefrontal cortex and subcortical structures.

Purpose of the Study:

  • To investigate whether utilization behavior is present in patients with lesions strictly confined to the prefrontal cortex.
  • To determine if localized prefrontal cortex damage, without extensive subcortical involvement, can elicit utilization behavior.
  • To compare the occurrence of utilization behavior in prefrontal cortex patients with temporal lobe patients and healthy controls.

Main Methods:

  • Neuropsychological examination including assessment for utilization behavior.
  • Study groups comprised patients with surgical excisions or cerebrovascular accidents affecting the prefrontal cortex, temporal lobe, and neurologically intact individuals.
  • Careful matching of control groups to lesion groups based on relevant demographic and clinical factors.

Main Results:

  • No significant difference was found in the presence of utilization behavior between patients with prefrontal cortex lesions and those with temporal lobe lesions.
  • Patients with prefrontal cortex lesions did not exhibit utilization behavior more frequently than carefully matched healthy individuals.
  • The findings indicate that utilization behavior is not solely dependent on prefrontal cortex integrity.

Conclusions:

  • Lesions restricted to the prefrontal cortex are insufficient to cause utilization behavior.
  • The manifestation of utilization behavior in prior studies with extensive anterior brain damage may be attributable to concurrent subcortical lesions.
  • This research refines the understanding of the neuroanatomical basis of utilization behavior, highlighting the potential role of subcortical structures.