Neuropyschological profile of reversible cognitive impairment in a patient with a dural arteriovenous fistula.
ABSTRACT Patients with dural arteriovenous fistulas (dAVFs) may present with cognitive impairment secondary to venous hypertension or ischemia.
We present a patient with a dAVF supplied by the posterior meningeal artery who presented with severe encephalopathy and imaging consistent with bilateral thalamic ischemia.
Detailed pre-operative neuropsychological testing documented severe cognitive deficits across multiple domains, localizing diffusely in the cerebral cortex, beyond that which would be expected from purely thalamic involvement. Approximately 2 months following a combined endovascular and surgical repair, repeat neuropsychological testing documented a dramatic improvement in cognitive symptoms while MRI abnormalities in the thalami resolved.
Detailed neuropsychological testing may be useful in patients presenting with dAVFs in order to identify cognitive impairment, which may be out of proportion to imaging findings. Recognition of dAVF-associated cognitive impairment may lead to more aggressive, timely treatment in patients with otherwise lower-risk lesions. This detailed testing can also provide a baseline in order to document cognitive recovery after fistula repair.
Conference Paper: The simulant discrimination between self and non-self by using strings[Show abstract] [Hide abstract]
ABSTRACT: The natural immune system has evolved many interesting mechanisms to solve complex engineering tasks. An ongoing research on the metaphor between the immune system and the host-based intrusion detection is reported. The primary investigation focuses on the simulation of the discrimination between self-behaviors and non-self behaviors by using strings in this paper. The experiment results demonstrate that it is possible to discriminate the dangerous behaviors from others by using sequences of system calls. This work is a part of a research program aiming at building computer security systems that incorporate the mechanisms and algorithms used by natural immune systems.Machine Learning and Cybernetics, 2004. Proceedings of 2004 International Conference on; 09/2004
Conference Paper: Solve the film-copy deliverer problem using ant colony system[Show abstract] [Hide abstract]
ABSTRACT: The film-copy deliverer problem (FDP) was presented in 1993. Since then, there has been two main algorithms to solve it: in the first algorithm, one transforms FDP into TSP and then solves it; in the second one uses a special genetic algorithm established by Cheng, R.W. & Gen, M. in 1995. In this paper, the limitations of these two algorithms are firstly analyzed, such as the dimensional increase and the local optimization, etc. And then, a novel heuristic algorithm based on ant colony system (ACS) is presented to solve the FDP, in which some new strategies such as adding new parameters and killing artificial ants are introduced. A randomly generated FDP is given. The experimental results show that the proposed algorithm is effective for solving FDP.Machine Learning and Cybernetics, 2004. Proceedings of 2004 International Conference on; 09/2004
- Age and Ageing 02/2010; 39(3):389-92. DOI:10.1093/ageing/afq017 · 3.11 Impact Factor