Hans-Peter Richter

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Cavernous malformations are vascular anomalies that can cause severe neurological deficits, seizures and hemorrhagic stroke if these lesions are located in the brain. In patients with cavernomas, constitutional mutations of the KRIT1 gene have been identified. The pathogenetic mechanisms leading to cerebral cavernous malformations (CCM) development are(More)
OBJECTIVE Optimal treatment of elderly patients with Type II odontoid fractures is controversial. Suggestions vary between conservative management and different types of early surgery. Recent data confirm that early surgery may be warranted because conservative treatment has a high rate of failure in the elderly. METHODS We performed a case-control study(More)
OBJECTIVE Facial nerve paresis and hearing loss are common complications after vestibular schwannoma surgery. Experiments with facial nerves of the rat and retrospectively analyzed clinical studies showed a beneficial effect of vasoactive treatment on the preservation of facial and cochlear nerve functions. This prospective and open-label randomized pilot(More)
OBJECT Botulinum toxin injections are the best therapeutic option in patients with spasmodic torticollis. Although a small number of patients do not benefit from such therapy, the majority respond well but may develop antibodies to the toxin after repeated applications. In those termed primary nonresponders, no improvement related to botulinum toxin has(More)
OBJECTIVE Little is known about patient satisfaction and disability after brachial plexus surgery. Would patients undergo the procedure again, if they knew the current result beforehand? How do they rate their result and their disability? METHODS Of 319 plexus patients who had undergone surgery between 1995 and 2005, 199 received a 65-item questionnaire.(More)
OBJECTIVE Management of conducting neuroma-in-continuity in primary surgery for obstetrical brachial plexus palsy (OBPP) is still discussed controversially. We present our experience with intraoperative neurophysiological recordings in the management of lesions in continuity in OBPP. METHODS A series of ten children with lesions in continuity of the upper(More)
OBJECTIVE In this study, we compare different surgical procedures regarding the functional outcome of traumatic peroneal nerve lesions. METHODS In a retrospective study, 48 patients with traumatic lesions (17 iatrogenic) of the peroneal nerve were evaluated. Twenty-two patients presented with lesions in continuity displaying regenerative potential by(More)
Observations of magnetic field effects on biological systems have often been contradictory. For amphibian eggs, a review of the available literature suggests that part of the discrepancies might be resolved by considering a previously neglected parameter for morphological alterations induced by magnetic fields--the jelly layers that normally surround the(More)
As long as humans have been medically treated, unfortunate cases of inadvertent injury to nerves afflicted by the therapist have occurred. Most microsurgically treated iatrogenic nerve injuries occur directly during an operation. Certain nerves are at a higher risk than others, and certain procedures and regions of the body are more prone to sustaining(More)
OBJECT Although transpedicular fixation is a biomechanically superior technique, it is not routinely used in the cervical spine. The risk of neurovascular injury in this region is considered high because the diameter of cervical pedicles is very small and their angle of insertion into the vertebral body varies. This study was conducted to analyze the(More)