RESUMO
We present an independent, flexible, and easily programmable software program for generating a wide set of visual stimuli paradigms in eye-movement studies. The software, called ASTIDET (Advanced Stimuli Design for Eye Tracking), has been interfaced in real time with a high speed video-based eye tracking system in order to obtain a reliable measurement of saccades. Two saccadic paradigms have been tested (gap and memory guided tasks) in 10 normal subjects. The preliminary results confirm that ASTIDET is a user-friendly software and can be interfaced with a video-based eye-tracking device in order to obtain reliable measurement of saccades.
Assuntos
Movimentos Oculares/fisiologia , Gravação em Vídeo , Desenho de Equipamento , Humanos , Tempo de Reação , Reprodutibilidade dos Testes , Software , Gravação em Vídeo/instrumentação , Gravação em Vídeo/métodosRESUMO
OBJECTIVE: To evaluate whether a virtual reality workstation (Fetouch system) offering three-dimensional (3D) fetal visual and kinesthetic interaction may affect maternal stress. METHODS: Maternal-fetal visual and kinesthetic interaction was obtained through a haptic interface based on 3D reconstruction of sequencial bi-dimensional ultrasound images of the fetus. Maternal stress was assessed before and after visual/kinesthetic interaction with the fetus: 1) by using the State Trait Anxiety Inventory-Form Y (STAI) test, and 2) by measuring salivary cortisol levels. Statistical analysis was performed by paired t test and analysis of variance for repeated measures. RESULTS: After the fetal visual and kinesthetic experiences, a significant reduction was observed in anxiety (low state anxiety group, P < .0034; high state anxiety group, P < .0108), as well as in salivary cortisol concentration (P < .0004). CONCLUSION: Physical interaction with the fetus through a 3D model may reduce maternal stress.
Assuntos
Ansiedade , Relações Mãe-Filho , Estresse Psicológico , Tato , Interface Usuário-Computador , Adulto , Feminino , Humanos , Hidrocortisona/análise , Imageamento Tridimensional , Cinestesia , Entrevista Psiquiátrica Padronizada , Gravidez , Saliva/químicaRESUMO
Ultrasound technologies have been widely used in gynecology and obstetrics. Modern ultrasound systems allow the reconstruction of a 3D model of the subject being scanned, but even though visual interfaces have reached very high standards, the problem of representing a 3D image on a 2D computer screen still exists. Moreover no physical interaction is possible with such a model. The FeTouch system, developed at Siena University in the last two years, partially solves such issues by using stereo visual feedback and haptic devices. While the system can be used with any 3D model obtained from ultrasound scans, its current prime use is to allow mothers to interact with a model of the fetus they are carrying. The system is freely available on the project web page.