Metabolic connectivity as index of verbal working memory.

Positron emission tomography (PET) data are commonly analyzed in terms of regional intensity, while covariant information is not taken into account. Here, we searched for network correlates of healthy cognitive function in resting state PET data. PET with [(18)F]-fluorodeoxyglucose and a test of verbal working memory (WM) were administered to 35 young healthy adults. Metabolic connectivity was modeled at a group level using sparse inverse covariance estimation. Among 13 WM-relevant Brodmann areas (BAs), 6 appeared to be robustly connected. Connectivity within this network was significantly stronger in subjects with above-median WM performance. In respect to regional intensity, i.e., metabolism, no difference between groups was found. The results encourage examination of covariant patterns in FDG-PET data from non-neurodegenerative populations.

A New Symptom, 'Palinendophonia', Associated with Pure Verbal Palinacousis Induced by a Right Inferior Temporal Lesion.

We describe the case of a patient with pure verbal palinacousis and perseveration of inner speech after a right inferior temporal lesion. The superior temporal lobe, including the superior temporal sulcus and the interhemispheric connection between the 2 superior temporal lobes, explored by tractography, were preserved. These regions are involved in voice processing, verbal short-term memory and inner speech. It can then be hypothesised that abnormal activity in this network has occurred. Palinacousis and 'palinendophonia', a term proposed for this symptom not previously reported, may be due to common cognitive processes disorders involved in both voice hearing and inner speech.

Association des anciens élèves de l'École polonaise : procès verbal

1865/08/09 (A1).

Association des anciens élèves de l'École polonaise : procès verbal

1874/10/04 (A10).

Association des anciens élèves de l'École polonaise : procès verbal

1877/08/05 (A13,N5).

Association des anciens élèves de l'École polonaise : procès verbal

1868/04/05 (A4).

Association des anciens élèves de l'École polonaise : procès verbal

1868/08/09 (A4).

Association des anciens élèves de l'École polonaise : procès verbal

1875/02/07 (A11).

Association des anciens élèves de l'École polonaise : procès verbal

1873/02/02 (A9).

Procès verbal (Association des anciens élèves de l'École polonaise)

Etat de collection : A. 1 (1865/08/09)-a. 33 (1897/02/07)

Association des anciens élèves de l'École polonaise : procès verbal

1867/04/21 (A3).

Association des anciens élèves de l'École polonaise : procès verbal

1867/08/04 (A3).

Association des anciens élèves de l'École polonaise : procès verbal

1874/02/01 (A10).

Association des anciens élèves de l'École polonaise : procès verbal

1866/08/08 (A2).

Association des anciens élèves de l'École polonaise : procès verbal

1870/02/06 (A6).