Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics
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Direct neuroaxis drug delivery has expanded the physician's armamentarium to provide treatment options to those who have failed more conservative interventions. Starting from Bier's 'cocainization of the spinal cord' in 1898, direct nervous system pharmacy delivery has long been recognized as an effective means to treat pain. Intrathecal pump systems are now commonplace in the management of numerous pain states, as well as of neuromuscular sequelae of central nervous system injury. ⋯ As well, surgical techniques and catheter systems have undergone refinements providing improved long-term safety and efficacy. We present a review of the historical evolution to current intrathecal therapies, as well as a dialog regarding patient selection, drug options, and side effects. Also, included is a discussion of surgical techniques, current delivery options and complications concerning pump placement.
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Surgery for psychiatric disorders first began in the early part of the last century when the therapeutic options for these patients were limited. The introduction of deep brain stimulation (DBS) has caused a new interest in the surgical treatment of these disorders. ⋯ A critical review of the major DBS targets under investigation for Tourette's syndrome, obsessive-compulsive disorder, and major depression is presented. Current and future challenges for the use of DBS in psychiatric disorders are discussed, as well as a rationale for referring to this subspecialty as limbic disorders surgery based on the parallels with movement disorders surgery.
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Voiding dysfunction, which includes incontinence, retention, and chronic pelvic pain, is a relatively frequent problem that can be difficult to manage. Neuromodulation via stimulation of the sacral nerves has been shown to improve these symptoms, although the exact mechanisms remain elusive. ⋯ In addition to placement of electrodes on the sacral nerve roots, modulation has also been reported by peripheral branches of the sacral nerves including the pudendal and posterior tibial nerves. Newer surgical techniques have significantly decreased the morbidity of the procedures and increased the probability of a successful outcome.
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Medical care of patients with dementia often occurs within a physician-patient relationship whose features differ from relationships with patients without dementia. Many basic assumptions of the physician-patient relationship may not completely hold true, and certain aspects of the patient role may be shared by others besides the patient. For example, the entire premise of consent to the patient role may be inapplicable to patients who lack insight into their illness. ⋯ This can lead to viewing patients as collections of symptoms rather than as humans suffering with illnesses and burdens. The fact that certain medical interventions, such as treatment of neuropsychiatric disturbances that do not trouble the patient, may appear to be initiated for the primary purpose of alleviating caregiver emotional stress also affects the physician-patient relationship. The present review examines how this relationship may be altered and presents a framework within which these alterations can be considered.
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In the diseased brain, upon activation microglia express binding sites for synthetic ligands designed to recognize the 18-kDa translocator protein TP-18, which is part of the so-called peripheral benzodiazepine receptor complex. PK11195 [1-(2-chlorophenyl)-N-methyl-N-(1-methylpropyl)-3-isoquinoline carboxamide], the prototype synthetic ligand, has been widely used for the functional characterization of TP-18. Its cellular source in activated microglia has been established using high-resolution, single-cell autoradiography with the R-enantiomer [3H](R)-PK11195. ⋯ Thus, a profile of active disease emerges that matches some of the typical distribution patterns known from structural neuroimaging techniques, but additionally shows involvement of brain regions linked through neural pathways. In the context of cell-based in vivo neuropathology, the image data are thus best interpreted in the context of the emerging cellular understanding of brain disease or damage, rather than the definitions of clinical diagnosis. One important observation, borne out by experiment, is the long latency with which activated microglia or increased PK11195 retention appear to gradually emerge and remain in distal areas secondarily affected by disease, supporting speculations that the presence of activated microglia is an important corollary of brain plasticity.