~urol Neurosurg 1ge: clinical and complications, but the monitoring methods must be simple to perform, sensitive, and reliable. Median nerve somatosensory evoked potential (SEP) monitoring fulfills these criteria. Between 1985 nd 1990, we performed 994 h S. Successful operations of the carotid artery with SEP monitoring. In 92% of the cases, we were able t obtain viable SEP tracings. 3.. Case r...

Simulation models are often used to support decision naking for problems \vith uncertain inputs and pararneers. Three types of models are used: deterministic. risk. md uncertainty models. Risk models are popular \\'ith 'esearchers, but can be used only \\Then the joint probabilty distribution of the inputs and parameters is kno\vn. In nany real-life situations~ hov,rever, this is not the case. ...

S N INCE THE INCEPTION of positron emission tomography (PET) several decades ago, PET canner design and performance have improved ramatically. The number of detector elements has ncreased from 20 to 20,000 and the axial field f view from 2 to 20 cm, the spatial resolution as improved from 25 to 5 mm, and the ensitivity has increased 1000-fold.1,2 At the ame time, the clinical applications of PE...

Simple Effects Following a significant interaction, follow-up tests are usually needed to explore the exact nature of the interaction. Simple effects (sometimes called simple main effects) are differences among particular cell means within the design. More precisely, a simple effect is the effect of one independent variable within one level of a second independent variable. In our hypothetical ...