Integration of spatially opposing cues by a single interneuron guides decision-making in C. elegans.

The capacity of animals to respond to hazardous stimuli in their surroundings is crucial for their survival. In mammals, complex evaluations of the environment require large numbers and different subtypes of neurons. The nematode C.

Bleeding tendency: a practical approach in dentistry.

The dental profession faces the problems of exaggerated bleeding on a daily basis. The hemostatic, as well as the fibrinolytic processes are better understood today, and the dentist should be familiar with them. The activation of coagulation factors and their clinical expression in the circulation are both described.

Technique for removal of femoral components with intercondylar articulation in total knee arthroplasty.

Total knee revision arthroplasty is a challenging and demanding procedure. Removal of well-fixed implants must be done meticulously to preserve bone stock. The presence of intercondylar geometries compounds this problem because the cement-metal interface is inaccessible.

The predictive value of five clinical signs in the evaluation of meniscal pathology.

One hundred sixty-one consecutive patients with knee pain of at least 1 year's duration were studied on a prospective basis to determine the predictive value of five common clinical tests for the diagnosis of meniscal tears. Each patient had a preoperative examination that evaluated the presence or absence of joint line tenderness, pain on forced flexion, the presence of a positive McMurray test, positive Apley grind and distraction tests, and the presence of a block to extension. The results of these tests were then compared to arthroscopic findings.

Patent ductus arteriosus in premature infants.

An analysis of the course and complications in the ligation of patent ductus arteriosus (PDA) in 30 very low birth-weight preterm neonates was carried out. The mean gestational stage at birth was 26.97 weeks, and median weight was 811 gm.