Emotional impairment after right orbitofrontal lesion in a patient without cognitive deficits

Alessandra Maietti, Alessandro Angrilli, Daniela Palomba, Anna Cantagallo, Luciano Stegagno

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74 Citazioni (Scopus)

Abstract

THE present study describes a patient, M.L., with right orbitofrontal lesion, who showed no impairment on main neuropsychological tests, including those measuring frontal functions. Nevertheless, he had deeply affected emotional responses. In line with Damasio's work, the patient had lower skin conductance during the projection of a standardized set of emotional slides. Furthermore, he showed altered facial expressions to unpleasant emotions, displaying low corrugator supercilii electromyographical activity associated with reduced recall of unpleasant stimuli. During a task focusing on imagery of emotional situations, M.L.'s heart rate and skin conductance responses were affected during both pleasant and unpleasant conditions. Facial expressions to unpleasant imagery scripts were also impaired. Thus, the orbitofrontal cortex proved to play a critical role in retrieval of psychophysiological emotional patterns, particularly to unpleasant material. These results provide the first evidence that orbitofrontal lesions are associated with emotional impairment at several psychophysiological levels. NeuroReport 10:1741-1746 (C) 1999 Lippincott Williams & Wilkins.
Lingua originaleEnglish
pagine (da-a)1741-1746
Numero di pagine6
RivistaNeuroReport
Volume10
DOI
Stato di pubblicazionePubblicato - 1999

Keywords

  • corrugator muscle
  • emotion
  • facial expression
  • heart rate
  • imagery
  • memory
  • orbitofrontal cortex
  • skin conductance

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