Impairment in clock-time estimation following right hemisphere ischemic damage.
In order to assess clock-time estimation (CTE), we asked "what time is it in your opinion?" to 48 recent stroke in-patients, 21 with right (RH), 27 with left hemispheric (LH) lesions, and to 20 control in-patients without brain lesions (C). Errors were measured in terms of the number of minutes by which the estimated clock-time was later (advance errors) or earlier (delay errors) than the real clock-time. CTE was considered pathological when exceeding the mean advance or delay errors observed in control patients plus 2.5 standard deviations. The estimation of the duration of a short psychological interview was also assessed. CTE, and not duration estimation, was disturbed in patients. RH patients made significantly more pathological advance errors than LH patients (43% vs. 12%). This study points out the RH dominance for CTE in stroke patients.
Morin
C
C
Médecine Physique et Réadaptation (Groupe Hospitalier Pitié-Salpêtrière AP-HP), Paris, France. catherine.morin@chups.jussieu.fr
Guigot
J
J
Manai
R
R
Vu
P
P
Guérin
N
N
Samson
Y
Y
Pradat-Diehl
Touitou
Y
Y
D000328:Adult; D000704:Analysis of Variance; D002545:Brain Ischemia / Q000503:physiopathology*; D016022:Case-Control Studies; D004292:Dominance, Cerebral; D005260:Female; D006801:Humans; D007406:Interview, Psychological / Q000379:methods; D008297:Male; D008875:Middle Aged; D011930:Reaction Time / Q000502:physiology; D013998:Time Perception / Q000502:physiology*