Impairments in an early stage of the decision-making process in patients with ventromedial prefrontal damage: preliminary results.

Lesions of the ventromedial prefrontal cortex can result in a deficient decision-making behavior. So far, most experimental results in the neuropsychological decision-making research have been obtained with gambling tasks. Due to their high complexity, it is difficult to evaluate the underlying processes of the decision-making deficits. The aim of this study was to assess if patients with ventromedial prefrontal damage compared to patients with dorsolateral prefrontal damage and controls show a deficit in an early stage of the decision-making process. Nine patients with ventromedial prefrontal damage, three with dorsolateral prefrontal damage, and eleven healthy controls were tested with a newly developed decision task in which they had to search actively for the information they needed for their decisions. Our results show that patients with ventromedial prefrontal damage compared to the brain-lesioned dorsolateral prefrontal control group and healthy controls searched less for information with regard to risk defusing operators or consequences of their decisions indicating impairment already in the early stage of the decision-making process.

Ten-year follow-up of a randomized controlled trial comparing saphenofemoral ligation and stripping of the great saphenous vein with endovenous laser ablation (980 nm) using local tumescent anesthesia.

OBJECTIVE: The long-term results of saphenofemoral ligation and stripping (SFL/S) were compared with 980-nm bare fiber endovenous laser ablation (EVLA) for the treatment of great saphenous vein (GSV) incompetence. METHODS: This was a single-center, randomized, controlled trial with a follow-up time of 10 years. Patients with GSV incompetence were randomized to undergo SFL/S or EVLA under tumescent anesthesia. The primary outcome was recurrence of groin-related varicose veins seen on duplex ultrasound imaging and clinical examination. The secondary outcomes were (changes or improvement in) CEAP clinical class, venous symptoms, cosmetic results, quality of life, reinterventions, and complications. RESULTS: Between June 2007 and December 2008, 122 patients (130 limbs) were included; of these, 68 limbs were treated with SFL/S and 62 limbs with EVLA. The 10-year estimated freedom from groin recurrence as seen on duplex ultrasound imaging was higher in the SFL/S group (73% vs 44% in the EVLA group; P = .002), and the same trend was seen for clinically evident recurrence (77% vs 58%, respectively; P = .034). Nine reinterventions (17%) were deemed necessary in the SFL/S group vs 18 (36%) in the EVLA group (P = .059). All reinterventions in the SFL/S group consisted of foam sclerotherapy. Reinterventions in the EVLA group included foam sclerotherapy (n = 5), crossectomy (n = 2), and endovenous procedures (n = 11). There was no significant differences in quality of life and relief of venous symptoms. Cosmetic appearance improved, with a better cosmetic rating in the SFL/S group compared with the EVLA group (P = .026). One patient in the SFL/S group had a persisting neurosensory deficit remaining at 10 years. CONCLUSIONS: This study showed no clear long-term advantage of EVLA with a 980-nm wavelength and bare-tip fiber over high ligation and stripping of the GSV under local tumescent anesthesia.

The neuropsychological assessment of cognitive deficits considering measures of performance variability.

Neuropsychologists often face interpretational difficulties when assessing cognitive deficits, particularly in cases of unclear cerebral etiology. How can we be sure whether a single test score below the population average is indicative of a pathological brain condition or normal? In the past few years, the topic of intra-individual performance variability has gained great interest. On the basis of a large normative sample, two measures of performance variability and their importance for neuropsychological interpretation will be presented in this paper: the number of low scores and the level of dispersion. We conclude that low scores are common in healthy individuals. On the other hand, the level of dispersion is relatively small. Here, base rate information about abnormally low scores and abnormally high dispersion across cognitive abilities are provided to improve the awareness of normal variability and to serve clinicians as additional interpretive measures in the diagnostic process.