Anatomical and physiological basis, clinical and surgical considerations, mechanisms underlying efficacy and future prospects of cortical stimulation for pain.

SCOPUS: re.jinfo:eu-repo/semantics/publishe

The traumatic aspect of ventricular catheterization demonstrated by Magnetic Resonance Imaging

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Slow saccades in supra-reticular lesions

info:eu-repo/semantics/nonPublishe

Selective unilateral absence or attenuation of wave V of brain-stem auditory evoked potentials with intrinsic brain-stem lesions

The contribution of ipsilateral and contralateral auditory brain-stem structures to the generation of wave V of brain-stem auditory evoked potentials is a controversial subject. We describe two cases with an intrinsic brains-stem lesion that involved the lateral lemniscus unilaterally in the middle and upper pons. The focal nature of the auditory structures was confirmed by detailed neuropathologic data in one case and by magnetic resonance scans in the other one. In both cases, brain-stem auditory evoked potentials revealed the unilateral absence (case 1) or marked attenuation (case 2) of wave V on stimulation of the ear contralateral to the intrinsic pontine lesion. Findings in both cases strongly suggest that wave V is predominantly generated by pontine structures contralateral to the stimulated ear and that the integrity of the contralateral lateral lemniscus is essential.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Evoked potentials in anesthesia: physiological considerations.

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Benign transient urinary retention

Three cases of acute urinary retention due to sacral myeloradiculitis are described. The authors stress the importance of diagnosing this rare and benign condition, which, in the past, has too often been mislabelled as either psychogenic or the first manifestation of a demyelinating disease.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Audiogenic startle reflex in acute hemiplegia.

The generators of the audiogenic startle reflex (ASR) are located in the bulbopontine reticular formation. We studied the influence of acute vascular supratentorial lesions on ASR. Ten patients with hemiplegia due to hemispheric cerebral infarct were studied within 5 days of stroke onset. ASR and magnetic cortical stimulation were performed the same day. A muscle response to magnetic stimulation was not elicited over the plegic side in any patient. In four of seven patients, ASR was enhanced over the plegic side. We suggest that enhanced ASR is due to the loss of a predominantly inhibitory hemispheric drive on ASR generators.Journal Articleinfo:eu-repo/semantics/publishe

Functional MR Imaging activation of somatosensory cortex in a hand-grafted patient with early clinical sensory recovery

Scientific paper oral 04-O-769 ASNRinfo:eu-repo/semantics/nonPublishe

A propos d'un cas de tumeur intramédullaire

Case report: A 52-year-old woman without relevant medical history presented neck pain and weakness of the right hand Since 2 months. We noted bilateral pyramidal signs With sensory disorders of the four limbs. Magnetic resonance imaging (MRI) evidenced a right-sided intramedullary lesion at the level of C6 and C7, measuring 10x15mm. The evoked diagnoses were astrocytoma and hemangioblastoma. Surgical resection was partial because of: i) the absence of cleavage plan between the tumor and the spinal cord, ii) the peroperative anatomopathological diagnosis of metastasis associated With poor prognosis and iii) the temporary loss of evoked potentials on neuromonitoring. The final anatomopathological diagnosis confirmed a metastatic pulmonary adenocarcinoma. The disease was pluri-metastatic and uncontrolled 8 months after neurosurgery. Discussion: Most intramedullary spinal cord tumors are ependymomas and astrocytomas. Intramedullary metastases from visceral cancers are rare, associated With advanced neoplasia and poor prognosis. Conclusion Intramedullary metastases rarely present as the revealing presentation of a neoplastic disease. However, the diagnosis must be kept in mind. The strategy is to exclude a primary cancer and Other metastatic lesions in cases of rapid clinical evolution, smoking patient or atypical MRI images. The present case underlines the importance of peroperative anatomopathological examination and intraoperative neuromonitoring during spinal cord surgery.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Inflammatory demyelinating polyradiculoneuropathy associated with human immunodeficiency virus infection.

Five patients infected with immunodeficiency virus who were suffering from chronic polyradiculoneuropathy were investigated during evolution of the disease. Four of them were immunodeficient. The prominent neurological feature was distal and symmetrical weakness of the legs. After 5 months only one patient had improved. All patients had an increased protein level in the cerebrospinal fluid and pleocytosis. Electrodiagnostic studies and sural nerve biopsies indicated demyelination. Sural nerve viral cultures, including human immunodeficiency virus, were negative. The presence of circulating anti-peripheral nerve antibodies and of immunoglobulin deposits in nerve biopsy specimens was investigated by immunofluorescence techniques but failed to demonstrate any immunoreactivity.Journal Articleinfo:eu-repo/semantics/publishe