[Cervical spine and accelerations in aeronautical environment: ergonomic and electromyographic approaches].

Both, an analysis of the variation of the electromyographic signal with respect to the acceleration endured by flying personnel and an ergonomic evaluation of pilot activity, have been achieved. The authors show then the inadequacy of the muscular response to the high Gz with rapid on set and its functional incompatibility to provide simultaneously a correct bearning contraction and a good mobility of neck. Consequently, the authors propose an instruction of flying personnel about these risks and they determine a specific muscular training.

Correlation of prenatal MRI and autopsy findings in the diagnosis of vein of galen arteriovenous malformation.

We report the case of an arteriovenous malformation (AVM) of the vein of Galen diagnosed in utero at the 34th week of gestation by ultrasound and MRI. Following interdisciplinary advice, the family decided to terminate the pregnancy. This was carried out in the 36th week of gestation.

First trimester diagnosis of fetal nuchal edema. Report of 29 cases.

During a 4-year period, 29 fetal nuchal edemas were observed, associated with other ultrasound abnormalities in 7 cases (24%). Fetal karyotypes were abnormal in 10 cases: 6 trisomy 21; 3 trisomy 18, and 1 Turner's syndrome. Isolated fetal nuchal edema was associated with aneuploidy in 4 cases: 3 trisomy 21, and 1 trisomy 18.