Anosognosia for hemiplegia

The contributory role of right inferior frontal gyrus

Kathleen Bechtold Kortte, Jessica Wolfman McWhorter, Mikolaj A. Pawlak, Jamie Slentz, Sandeepa Sur, Argye Hillis-Trupe

Research output: Contribution to journalArticle

Abstract

Objective: Awareness of motor functioning is most likely a complex process that requires integration of sensory-motor feedback to constantly update the system on the functioning of the limb during motor behavior. Using lesion mapping procedures and behavioral measures, the current study aimed to evaluate neural correlates of anosognosia for hemiplegia (AHP) in the acute stage (first 48 hr) of right hemisphere stroke. Method: Thirty-five individuals with right hemisphere stroke who presented to an urban medical center within 24 hr of symptom onset were included in the study. All 35 individuals had hemiplegia, and 8 of these individuals exhibited AHP. Results: Fisher's exact test statistical map of lesion-deficit association (range is between-log(p) 4 to 11) found maximal value of 10.9 located in pars orbitalis (Brodmann's Area 47; BA). In this selected location, 6 out of 8 patients with AHP had tissue abnormality, whereas none of the unaffected subjects had tissue abnormality in BA 47. Right BA 44/45 was also found to be lesioned more frequently in individuals with AHP (75%) than without AHP (11%). Conclusions: The current study findings provide preliminary support for unique involvement of the right inferior frontal gyrus (IFG), pars orbitalis (BA 47) in AHP. The current data suggest that frontal operculum may play a key role in awareness of limb functioning.

Original languageEnglish (US)
Pages (from-to)421-432
Number of pages12
JournalNeuropsychology
Volume29
Issue number3
DOIs
StatePublished - May 1 2015

Fingerprint

Agnosia
Hemiplegia
Prefrontal Cortex
Extremities
Stroke
Sensory Feedback
Inferior Frontal Gyrus
Lesion
Right Hemisphere

Keywords

  • Anosognosia
  • Awareness
  • Imaging
  • Stroke

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Arts and Humanities (miscellaneous)

Cite this

Anosognosia for hemiplegia : The contributory role of right inferior frontal gyrus. / Kortte, Kathleen Bechtold; McWhorter, Jessica Wolfman; Pawlak, Mikolaj A.; Slentz, Jamie; Sur, Sandeepa; Hillis-Trupe, Argye.

In: Neuropsychology, Vol. 29, No. 3, 01.05.2015, p. 421-432.

Research output: Contribution to journalArticle

Kortte, Kathleen Bechtold ; McWhorter, Jessica Wolfman ; Pawlak, Mikolaj A. ; Slentz, Jamie ; Sur, Sandeepa ; Hillis-Trupe, Argye. / Anosognosia for hemiplegia : The contributory role of right inferior frontal gyrus. In: Neuropsychology. 2015 ; Vol. 29, No. 3. pp. 421-432.
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