Search results for "Abducens nerve"
showing 5 items of 5 documents
Cervico-Oculo-Acusticus (Wildervanck's) syndrome: a clinical variant of Klippel-Feil sequence?
1990
A 7-year-old female child with phenotype of Cervico-Oculo-Acousticus (Wildervanck's) syndrome is presented. In addition to fusion of multiple cervical vertebrae with short neck, abducens nerve palsy and deafness, the child showed severe growth and bone delay, renal abnormalities and slight mental retardation. The presence of such malformations seems to suggest that Wildervanck's syndrome is a clinical variant of Klippel-Feil sequence. Both conditions usually have sporadic occurrence with female prevalence, more consistent for cervico-oculo-acousticus syndrome. The possibility of dominant inheritance has been postulated for both, autosomal for Klippel-Feil, autosomal or X-linked with lethali…
Response of abducens internuclear neurons to axotomy in the adult cat
2000
The highly specific projection of abducens internuclear neurons on the medial rectus motoneurons of the oculomotor nucleus constitutes an optimal model for investigating the effects of axotomy in the central nervous system. We have analyzed the morphological changes induced by this lesion on both the cell bodies and the transected axons of abducens internuclear neurons in the adult cat. Axotomy was performed by the transection of the medial longitudinal fascicle. Cell counts of Nissl-stained material and calretinin-immunostained abducens internuclear neurons revealed no cell death by 3 months postaxotomy. Ultrastructural examination of these cells at 6, 14, 24, and 90 days postaxotomy showe…
The risk of abducens palsy after diagnostic lumbar puncture.
2000
Abducens palsy occasionally has been observed after diagnostic lumbar puncture (DLP).1-3 Its risk is not exactly known. We are aware of only one report, which mentions not a single case among 1,341 DLPs when using 22-gauge needles.4 At our clinic, an average of 800 inpatients a year undergo DLP. We usually use 22-gauge needles, and occasionally (in less than 5%), 20-gauge needles. Over a 14.5-year period, we saw two patients with abducens palsy—one unilateral, one bilateral—after DLP. This translates to a risk of less than 1 out of 5,800 DLPs. ### Patient 1. A 61-year-old man with type 2 diabetes noticed progressive weakness of the legs. Neurologic examination revealed proximal paraparesis,…
Klinische Manifestation der Lyme-Borreliose im Kindesalter
1989
We report on 4 children with different clinical manifestations of Lyme-Borreliosis. One patient presented with a stage 2 typical aseptic meningitis and 2 others with symptoms of Schonlein-Henoch purpura and rheumatic disease respectively. A further case had bilateral palsy of abducens nerve and unilateral palsy of trochlearis nerve which are described for the first time in Lyme-Borreliosis. Diagnosis was established by detection of specific antibodies to Borrelia in all patients. Differential diagnosis of these symptoms should include Lyme-Borreliosis.
Internuclear ophthalmoplegia of abduction: clinical and electrophysiological data on the existence of an abduction paresis of prenuclear origin.
1992
Three patients showed unilateral and five bilateral abduction paresis. Five had associated adduction nystagmus of the contralateral eye. Electrophysiological testing of masseter and blink reflexes indicated an ipsilateral rostral pontine or mesencephalic lesion, and excluded a lesion of the infranuclear portion of the abducens nerve. Abduction paresis was attributed to impaired inhibition of the tonic resting activity of the antagonistic medial rectus muscle. The prenuclear origin of the disorder is based on morphological and neurophysiological evidence of an ipsilateral inhibitory connection between the paramedian pontine reticular formation and the oculomotor nucleus running close to but …