{"title":"Foreword.","authors":"Michael J Aminoff, François Boller, Dick F Swaab","doi":"10.1016/B978-0-443-22212-2.00030-6","DOIUrl":"https://doi.org/10.1016/B978-0-443-22212-2.00030-6","url":null,"abstract":"","PeriodicalId":12907,"journal":{"name":"Handbook of clinical neurology","volume":"218 ","pages":"ix"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148101458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gloria P Mingolla, Ilaria A Di Vico, Elena Antelmi
{"title":"Sleep in tic disorders and Tourette syndrome.","authors":"Gloria P Mingolla, Ilaria A Di Vico, Elena Antelmi","doi":"10.1016/B978-0-443-13554-5.00006-7","DOIUrl":"10.1016/B978-0-443-13554-5.00006-7","url":null,"abstract":"<p><p>Sleep disturbances are highly prevalent in patients with tic disorders and Tourette syndrome, with up to 80% of patients experiencing sleep difficulties. Insomnia is notably present, and pediatric patients often experience parasomnias, including sleepwalking and night terrors. Disruptions in circadian rhythms are also reported, with a pronounced evening chronotype. Concurrently, patients may also suffer from sleep-related movement disorders, and tics are reported to often persist during sleep, further contributing to significant sleep fragmentation. The presence of comorbid attention-deficit hyperactivity disorder may further exacerbate sleep disturbances. Current genetic and neurobiologic evidence suggests shared pathophysiologic mechanisms, particularly involving the dopaminergic system, that underlie both tic manifestations and sleep disruptions. While pharmacologic and nonpharmacologic interventions offer potential therapeutic avenues, their efficacy in a combined tic-sleep disorder context requires further investigation.</p>","PeriodicalId":12907,"journal":{"name":"Handbook of clinical neurology","volume":"215 ","pages":"111-125"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146112873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Juan Francisco Martin-Rodriguez, Daniel Macias-Garcia, Pablo Mir
{"title":"Premonitory urges and other sensory phenomena in primary tic disorders.","authors":"Juan Francisco Martin-Rodriguez, Daniel Macias-Garcia, Pablo Mir","doi":"10.1016/B978-0-443-13554-5.00018-3","DOIUrl":"10.1016/B978-0-443-13554-5.00018-3","url":null,"abstract":"<p><p>Premonitory sensations, or urges, have become a central focus in the study of Gilles de la Tourette syndrome (TS). These bodily sensations, which precede tics, play a crucial role in the clinical manifestations of the syndrome. Tics are often performed to alleviate the discomfort caused by premonitory urges and provide temporary relief. Despite their importance, the causes and mechanisms of premonitory urges remain poorly understood. The severity of tics and an individual's ability to control them are closely related to the intensity and presence of these urges. Current research is actively investigating the neuroanatomic and neurophysiologic basis of premonitory urges, focusing on specific brain regions, neural pathways, and neurotransmitter systems. Understanding premonitory urges is essential for characterizing the clinical phenotype of TS and other neurodevelopmental tic disorders and for developing targeted therapies. By investigating the relationship between premonitory urges, tics, and associated clinical features - such as obsessions, compulsions, and anxiety - researchers aim to improve prognostic tools and refine treatment strategies. Ongoing investigations into these mechanisms hold great promise for improving the care and support of people with TS and, ultimately, their quality of life.</p>","PeriodicalId":12907,"journal":{"name":"Handbook of clinical neurology","volume":"215 ","pages":"239-248"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146112922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chase B Hellmer, Bart G Borghuis, Maureen A McCall
{"title":"Functional diversity and clinical evaluation of retinal ganglion cells.","authors":"Chase B Hellmer, Bart G Borghuis, Maureen A McCall","doi":"10.1016/B978-0-443-22193-4.00004-4","DOIUrl":"10.1016/B978-0-443-22193-4.00004-4","url":null,"abstract":"<p><p>Visual perception requires continuous, reliable communication from the eye to the brain. This is made possible by retinal ganglion cells (RGCs), whose axons comprise the optic nerve. Within the mammalian retina, ∼100 million photoreceptors capture photons of light reflected from the environment. Rather than acting as a \"pixel detector\" for reflected light, the retina performs significant neuronal computations across diverse circuits that selectively filter and encode information about distinct features of the visual scene. This visual feature detection culminates in approximately 1-1.5 million RGCs comprising ∼20 different types in primates. RGCs compute and transmit information about visual features to a variety of subcortical structures, where visual information is further processed and relayed to visual cortex. This review explores the basic physiology and anatomy of the retinal circuitry that underlies RGC processing in mammals, describing how vision scientists classify RGCs into distinct cell types, and summarizing the current understanding of feature detection by diverse RGC populations. We also review how electrophysiologic methods and/or imaging technologies are used for clinical evaluation of RGCs. Taken together, the information summarized in this review provides a detailed account of the known diversity of RGCs in the mammalian retina and their specific contributions to visual perception.</p>","PeriodicalId":12907,"journal":{"name":"Handbook of clinical neurology","volume":"217 ","pages":"147-167"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Perimetry and visual psychophysics.","authors":"Michael Wall, Edward Linton","doi":"10.1016/B978-0-443-22212-2.00013-6","DOIUrl":"10.1016/B978-0-443-22212-2.00013-6","url":null,"abstract":"<p><p>Patterns of visual loss are the key to anatomic localization. Strictly monocular defects map to the prechiasmal sensory visual system. Bitemporal hemianopia is the signature of damage to the optic chiasm. Incongruous homonymous hemianopia points to an optic tract lesion. The closer a lesion gets to the occipital cortex, the more congruous or similar are the patterns of homonymous hemianopia. Understanding these patterns will add an important dimension to the clinician's localization arsenal. Perimetry is the quantitation of the visual field. This is done with a perimeter and usually involves estimating visual thresholds with a range of light stimuli. It is used clinically to map patterns of visual loss due to damage to the sensory visual system. This chapter discusses the types of perimetric testing and the underlying psychophysics of perimetry. This is followed by the interpretation of perimetric results, the relevant visual system anatomy, and patterns of loss helpful for neurologic localization. Lastly, the difficult issue of deciding whether the visual field has changed is reviewed.</p>","PeriodicalId":12907,"journal":{"name":"Handbook of clinical neurology","volume":"218 ","pages":"109-129"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148101601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Immunotherapies on Guillain-Barré syndrome and other acute autoimmune neuropathies.","authors":"Linda W G Luijten, Bart C Jacobs","doi":"10.1016/B978-0-323-90887-0.00007-9","DOIUrl":"10.1016/B978-0-323-90887-0.00007-9","url":null,"abstract":"<p><p>Guillain-Barré syndrome (GBS) and other acute autoimmune neuropathies are rare but severe immune-mediated diseases of the peripheral nervous system. Early diagnosis is important for adequate monitoring and treatment, but it can be complicated by the rarity, heterogeneity in clinical presentation, and extensive differential diagnosis. The current proven effective treatments for GBS are intravenous immunoglobulins administered within 2 weeks and plasma exchange within 4 weeks from the onset of weakness. These therapies are immunomodulatory and aim to prevent further damage of peripheral nerves during the acute stage of the disease. Here we provide an overview of the early presentation of GBS and the required diagnostic workup to discriminate GBS from other causes, including other acute forms of autoimmune polyneuropathies. In addition, the current evidence-based immunotherapies for GBS are discussed along with the presumed pathophysiologic mechanisms of action and practical recommendations for the treatment in clinical practice. Despite current treatment, a substantial proportion of patients with GBS have a poor clinical course and outcome. We will present the latest developments regarding potential new treatments that are currently being evaluated and discuss various opportunities to optimize the design of future treatment trials toward a more effective and personalized treatment of GBS.</p>","PeriodicalId":12907,"journal":{"name":"Handbook of clinical neurology","volume":"214 ","pages":"329-344"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145959301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Immunotherapies in autoimmune movement disorders and cerebellar ataxia.","authors":"Benjamin Vlad, Bettina Balint","doi":"10.1016/B978-0-323-90887-0.00017-1","DOIUrl":"10.1016/B978-0-323-90887-0.00017-1","url":null,"abstract":"<p><p>The spectrum of autoimmune movement disorders is very broad with regard to clinical presentations, associated antibodies, and underlying immunopathophysiology. Early and adequate immunotherapy is key in the management to achieve good outcomes, avoid deterioration, or even death. The rarity of these disorders, however, entails a lack of gold-standard treatment trials we could base our management decisions upon. Here, we summarize existing knowledge about the treatment of autoimmune movement disorders and cerebellar ataxias with neuronal antibodies. We start with a brief introduction of the basic paradigms of neuronal antibody-associated autoimmunity, and of the principles of immune therapy generally applied in antibody-related neurologic disorders, to then discuss in more detail the main movement disorders and cerebellar ataxia related-antibody syndromes and their treatment.</p>","PeriodicalId":12907,"journal":{"name":"Handbook of clinical neurology","volume":"214 ","pages":"291-307"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145959118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Linking early adversity epigenetics and neuropsychiatric disorders: Interaction between environment epigenetics and inherited susceptibility variants.","authors":"Maegan Harvison, Patricia Pelufo Silveira","doi":"10.1016/B978-0-443-19043-8.00004-9","DOIUrl":"https://doi.org/10.1016/B978-0-443-19043-8.00004-9","url":null,"abstract":"<p><p>Early life adversity refers to adverse exposures (e.g., malnutrition, violence, psychologic stress) in early life and development that may induce long-lasting adaptations to these adverse environments. However, in situations where the environment no longer matches the one that induced these adaptations, this mismatch could lead to poor outcomes later in life. Early life adversity has been linked to neuropsychiatric outcomes in later life, such as mental health disorders, self-harming behaviors, suicidality, and substance dependence. This chapter examines the timing and types of the most common adversities, their cumulative effects, and the responsive mechanisms, including gene-environment interactions and epigenetic processes. Mechanisms involved in the link between early life adversity and later neuropsychiatric disorders are also explored, such as neuroendocrine networks and immune pathways. Characterizing resilience and susceptibility in the context of adversity can inform the identification of protective factors to combat this susceptibility, such as health and lifestyle changes during pregnancy and supportive family environments.</p>","PeriodicalId":12907,"journal":{"name":"Handbook of clinical neurology","volume":"219 ","pages":"287-305"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149193052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Immunotherapies in chronic immune-mediated neuropathies.","authors":"Chiara Briani, Andrea Visentin","doi":"10.1016/B978-0-323-90887-0.00019-5","DOIUrl":"https://doi.org/10.1016/B978-0-323-90887-0.00019-5","url":null,"abstract":"<p><p>Steroids and immunoglobulins, either intravenous or subcutaneous, have represented the cornerstone treatment of chronic immune-mediated neuropathies for many years. In the last decade, new therapeutic targets are being studied, with the potential to selectively dampen aberrant immune responses, including drugs that act both on the complement pathways and the recycling mechanism of IgG immunoglobulins by the neonatal receptor (FcRn). Among the latter, efgartigimod has recently been approved for the treatment of chronic inflammatory demyelinating polyradiculoneuropathy (CIDP). Also rituximab, an anti-CD20 monoclonal antibody mostly used in antimyelin-associated glycoprotein (MAG) antibody neuropathy and in autoimmune nodo-paranodopathies, has been tested both in open and double-blind studies in CIDP, whereas ARGX-117, an antibody targeting the C2 fraction of the complement, is under investigation in multifocal motor neuropathy. In anti-MAG antibody neuropathy, Bruton's tyrosine kinase inhibitors, zanubrutinib and acalabrutinib, are currently tested either as a single agent or in combination with rituximab.</p>","PeriodicalId":12907,"journal":{"name":"Handbook of clinical neurology","volume":"214 ","pages":"345-356"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145959194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mairi S Houlgreave, Katherine Dyke, Stephen R Jackson
{"title":"Noninvasive brain stimulation for Gilles de la Tourette syndrome.","authors":"Mairi S Houlgreave, Katherine Dyke, Stephen R Jackson","doi":"10.1016/B978-0-443-13554-5.00012-2","DOIUrl":"10.1016/B978-0-443-13554-5.00012-2","url":null,"abstract":"<p><p>This chapter explores evidence for the effectiveness of noninvasive brain stimulation (NIBS) for tic disorders and explores what the future may hold for these approaches. NIBS can be achieved through several means, including electrical stimulation of peripheral nerves and transcranial cortical stimulation using electrical or magnetic stimulation. Each of these techniques will be discussed with a focus on current evidence of effectiveness in treating tics, benefits, limitations, and current unknowns.</p>","PeriodicalId":12907,"journal":{"name":"Handbook of clinical neurology","volume":"215 ","pages":"299-310"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146112879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}