BACKGROUND AND PURPOSE Postoperative intraspinal subdural collections in children after posterior fossa tumor resection may temporarily hinder metastasis detection by MR imaging or CSF analysis, potentially impacting therapy. We investigated the incidence, imaging and clinical features, predisposing factors, and time course of these collections after posterior fossa tumor resection. MATERIALS...

Cortical Microstimulation for Neural Prostheses

Intraspinal injections of magnesium sulphate, in doses which do not affect the respiratory centre or other vital function, are capable of abolishing completely all clonic convulsions and tonic contractions in cases of human tetanus, and experimental tetanus in monkeys. The relaxing effects of the injections may last twenty-four hours or longer. In experimental tetanus in monkeys early intraspin...

While the motor and attentional roles of the frontal eye field (FEF) are well documented, the relationship between them is unknown. We exploited the known influence of visual motion on the apparent positions of targets, and measured how this illusion affects saccadic eye movements during FEF microstimulation. Without microstimulation, saccades to a moving grating are biased in the direction of ...

Electrical microstimulation and more recently optogenetics are widely used to map large-scale brain circuits. However, the neuronal specificity achieved with both methods is not well understood. Here we compare cell-targeted optogenetics and electrical microstimulation in the macaque monkey brain to functionally map the koniocellular lateral geniculate nucleus (LGN) projection to primary visual...

Cysticercosis is the commonest parasitic infection of the central nervous system (CNS) [ 11. According to the areas of involvement it can be classified as: (a) meningobasal, (b) mixed, (c) parenchymal, (d) intraventricular, and (e) intraspinal [2]. Isolated primary intraspinal cysticercosis is a very rare manifestation of this usually multifocal parasitic disease. We are reporting a case of cys...

Intraspinal microstimulation is being investigated to elicit coordinated motor responses for restoration of function. However, detailed maps of the neuroanatomy of the human spinal cord are lacking. We are developing a method to map motor nuclei in the spinal cord using potentials recorded from the surface of the spinal cord and model-based optimization. A volume conductor model of the spinal c...

the presentation treatment and postoperative progress of two patients with pearly intraspinal eptdermcids is described. in one of the patients the tumour recurred after the first removal. necessitating a second operation. despite serious distur bances of gait both patients improved following surgery. the literature in respect of these tumours. is reviewed

Intraspinal bronchogenic cysts are rare congenital cystic lesions. In all the reported cases, the cysts have been located in the cervical, upper thoracic or thoracolumbar segments. We report the case of an intraspinal bronchogenic cyst in the sacral location. We present the case of a 5-month-old female with a skin dimple in the midline over the sacral vertebra. Magnetic resonance image of the l...

Microstimulation is widely used in neurophysiology to characterize brain areas with behavior and in clinical therapeutics to treat neurological disorder. Current intensity and frequency, which respectively influence activation patterns in spatial and temporal domains, are typically selected to elicit a desired response, but their effective influence on behavior has not been thoroughly examined....