Headache in idiopathic intracranial hypertension. A CGRP-dependent head pain?

Headache is the most frequent and often the most severe symptom of idiopathic intracranial hypertension (IIH) clinical presentation, although pain characteristics are very variable among sufferers and the pain may even lack in some cases. Whatever the headache features, refractoriness to treatments, pain worsening in the recumbent position, and frequent awakenings with severe headache late in the night are the specific complains of such patients. However, a migraine or probable migraine headache, mostly with a chronic headache pattern, can be diagnosed in about 2/3 of the cases.

Dural sinus collapsibility, idiopathic intracranial hypertension, and the pathogenesis of chronic migraine.

Available evidences suggest that a number of known assumption on idiopathic intracranial hypertension (IIH) with or without papilledema might be discussed. These include (1) the primary pathogenetic role of an excessive dural sinus collapsibility in IIH, allowing a new relatively stable intracranial fluids pressure balance at higher values; (2) the non-mandatory role of papilledema for a definite diagnosis; (3) the possibly much higher prevalence of IIH without papilledema than currently considered; (4) the crucial role of the cerebral compliance exhaustion that precede the raise in intracranial pressure and that may already be pathologic in cases showing a moderately elevated opening pressure; (5) the role as "intracranial pressure sensor" played by the trigeminovascular innervation of dural sinuses and cortical bridge veins, which could represent a major source of CGRP and may explain the high comorbidity and the emerging causative link between IIHWOP and chronic migraine (CM). Accordingly, the control of intracranial pressure is to be considered a promising new therapeutic target in CM.

Pain cognition in migraine: from basic neurophysiology to a behavioral paradigm.

Most of the data in this review have been already reported by the authors in Neurological Science, but the goal of the present paper is to realize an integrated lecture of all the available data and look to the last achievements in pain cognition, with a special focus on migraine and chronic migraine. According to the proposed integrated perspective, migraine can be viewed as an adaptive behavioral response with evolutionistic advantages.

Starling resistors, autoregulation of cerebral perfusion and the pathogenesis of idiopathic intracranial hypertension.

Two critical functions for the control of intracranial fluids dynamics are carried on the venous side of the perfusion circuit: the first is the avoidance of cortical veins collapse during the physiological increases of cerebrospinal fluid (CSF) pressure in which they are immersed. The second, is the generation of an abrupt venous pressure drop at the confluence of the cortical veins with the dural sinuses that is required to allow a CSF outflow rate balanced with its production. There is evidence that both of these effects are ensured by a Starling resistor mechanism (a fluid dynamic construct that governs the flow in collapsible tubes exposed to variable external pressure) acting at the confluence of cortical veins in the dural sinus.

No evidence for an effect on brain atrophy rate of atorvastatin add-on to interferon β1b therapy in relapsing-remitting multiple sclerosis (the ARIANNA study).

Background: A previous phase 2 trial has suggested that statins might delay brain atrophy in secondary progressive multiple sclerosis.

Objectives: The objective of this study was to evaluate the effect of atorvastatin add-on therapy on cerebral atrophy in relapsing-remitting multiple sclerosis.

Methods: This randomised, placebo-controlled study compared atorvastatin 40 mg or placebo add-on therapy to interferon β1b for 24 months.

Intracranial pressure in unresponsive chronic migraine.

To assess the prevalence and possible pathogenetic involvement of raised intracranial pressure in patients presenting with unresponsive chronic migraine (CM), we evaluated the intracranial opening pressure (OP) and clinical outcome of a single cerebrospinal fluid withdrawal by lumbar puncture in 44 consecutive patients diagnosed with unresponsive chronic/transformed migraine and evidence of sinus stenosis at magnetic resonance venography. The large majority of patients complained of daily or near-daily headache. Thirty-eight (86.

Migraine and pregnancy: an internet survey.

Data in the literature show that migraine tends to improve during pregnancy in most migrainous women. The aim of this Internet survey was to obtain the most likely cross section of the situation in the general population with respect to the presence and course of migraine in pregnancy. All women who participated were asked to answer questions pertaining to their history of pregnancy and headache.

Sinus venous stenosis, intracranial hypertension and progression of primary headaches.

The recently advanced hypothesis that idiopathic intracranial hypertension without papilledema (IIHWOP) is a powerful risk factor for the progression of pain in individuals prone to episodic primary headache implies that IIHWOP is much more prevalent than it is believed to be in the general population and that it can run almost asymptomatic in most of the affected individuals. In this review, we discuss the evidence available supporting that: (a) sinus venous stenosis-associated IIHWOP is much more prevalent than believed in the general population and can run without symptoms or signs of raised intracranial pressure in most of individuals affected, (b) sinus venous stenosis is a very sensitive and specific predictor of intermittent or continuous idiopathic intracranial hypertension with or without papilledema, even in asymptomatic individuals, (c) in primary headache prone individuals, a comorbidity with a hidden stenosis-associated IIHWOP represents a very common, although largely underestimated, modifiable risk factor for the progression and refractoriness of headache.

Sinus venous stenosis-associated idiopathic intracranial hypertension without papilledema as a powerful risk factor for progression and refractoriness of headache.

Data from two recent studies strongly support the hypothesis that idiopathic intracranial hypertension without papilledema (IIHWOP) could represent a powerful risk factor for the progression of pain in primary headache individuals. The first study highlights that an asymptomatic IIHWOP is much more prevalent than believed in the general population and occurs only in central venous stenosis carriers. In the second study, about one half of a large consecutive series of unresponsive primary chronic headache patients shows significant sinus venous stenosis.

Position paper of the Italian Society for the study of Dementias (SINDEM) on the proposal of a new lexicon on Alzheimer disease.

A panel of Italian neurologists of the Italian Society for the study of Dementias (SINDEM) discussed the recently proposed new lexicon for Alzheimer disease (AD) and the related diagnostic criteria for the different phases of the disease (Preclinical AD, prodromal AD and Alzheimer's dementia) (Dubois et al. in Lancet Neurol 6:734-746, 2007; in Lancet Neurol 9:1118-1127, 2010). The aim of this discussion was to reach a consensus, among the Italian neurologists involved in the study and care of persons with dementia, in particular in reference to the potential use of the proposed diagnostic criteria in clinical practice.

Chronic migraine classification: current knowledge and future perspectives.

In the field of so-called chronic daily headache, it is not easy for migraine that worsens progressively until it becomes daily or almost daily to find a precise and universally recognized place within the current international headache classification systems. In line with the 2006 revision of the second edition of the International Classification of Headache Disorders (ICHD-2R), the current prevailing opinion is that this headache type should be named chronic migraine (CM) and be characterized by the presence of at least 15 days of headache per month for at least 3 consecutive months, with headache having the same clinical features of migraine without aura for at least 8 of those 15 days. Based on much evidence, though, a CM with the above characteristics appears to be a heterogeneous entity and the obvious risk is that its definition may be extended to include a variety of different clinical entities.

The Italian neurological schools of the twentieth century.

This lecture is not a historical lecture, but rather a journey through the "story" of neurology in Italy from its "prehistoric" beginning in the 19th century. The birth of a neurological school is that magical moment in which a founder attracts disciples: the more capable this founder is of transmitting methodology and allowing his pupils intellectual freedom, the longer his memory will live on. On the basis of this idea, the scientific biography of a few leading Italian neurologists of the 20th century is outlined, starting from Leonardo Bianchi, founder of the Italian Neurological Society in 1907.

Is chronic migraine a primary or a secondary condition?

In the light of the pathophysiologic knowledge acquired in recent years, a tentative redefinition of some types of headache, until now defined as primary, is now possible. Chronic migraine is proposed here as the consequence of "processes" to be ascribed to mechanisms activated by comorbid conditions. The observations supporting the possibility that allodynia represents the process leading to pain progression, which occurs in some migraineurs, are discussed.

Advancement in idiopathic intracranial hypertension pathogenesis: focus on sinus venous stenosis.

Idiopathic intracranial hypertension is consistently associated with venous outflow disturbances. Sinus venous stenosis are found at magnetic resonance venography in the large majority of IIH patients and may have various conformations, ranging from functional smooth narrowings of sinus segments associated or not with definite flow gaps, to segmental hypoplasia or aplasia of one or more central venous collectors. Stenosis are currently believed to be a consequence of a primary altered cerebrospinal fluid (CSF) pressure since it may normalize after CSF subtraction with lumbar puncture or shunting procedures.

Is idiopathic intracranial hypertension without papilledema a risk factor for migraine progression?

The association of chronic migraine (CM) with an idiopathic intracranial hypertension without papilledema (IIHWOP), although much more prevalent than expected in clinical series of CM sufferers, is not included among the risk factors for migraine progression. We discuss the available evidence supporting the existence of a pathogenetic link between CM and idiopathic intracranial hypertensive disorders and suggest a causative role for IIHWOP in migraine progression.

Restless legs syndrome and primary headaches: a clinical study.

Based on recent data about the association between restless legs syndrome (RLS) and migraine, we performed an observational study on the occurrence of RLS in patients affected by primary headaches. Two hundred headache patients (149 women and 51 men) and 120 (90 women and 30 men) sex-and age-matched control subjects were included. In the headache group, migraine without aura (MO) was the most represented headache type (n=114), followed by the "mixed" group (n=40) with MO, migraine with aura (MA) and frequent episodic tension-type headache (ETTH) in various combinations, and by ETTH alone (n=22).

Towards a definition of comorbidity in the light of clinical complexity.

Clinical complexity encompasses multiple levels, including all the disorders and conditions experienced by a person along cross-sectional and longitudinal contexts, the diversity of severity levels and courses of clinical conditions, but also the plurality of values of people experiencing health problems and seeking help for them. The term comorbidity refers to the association of two distinct diseases in the same individual at a rate higher than expected by chance. Looking systematically to comorbidity represents the main road to approach patients' clinical complexity.

Cranial neuralgias: from physiopathology to pharmacological treatment.

Cranial neuralgias are paroxysmal painful disorders of the head characterised by some shared features such as unilaterality of symptoms, transience and recurrence of attacks, superficial and "shock-like" quality of pain and the presence of triggering factors. Although rare, these disorders must be promptly recognised as they harbour a relatively high risk for underlying compressive or inflammatory disease. Nevertheless, misdiagnosis is frequent.

Short-term continuous infusion of apomorphine hydrochloride for treatment of Huntington's chorea: A double blind, randomized cross-over trial.

We evaluated tolerability and the efficacy of continuous infusion of apomorphine hydrochloride on involuntary movements and mood disorder in Huntington's disease (HD) patients in a pilot, single center, double-blind, randomized, crossover, and controlled versus placebo study. Nine patients with a molecular diagnosis of HD were screened for response to acute apomorphine injection. Four of them, not ameliorating at the acute test, were discontinued.

Neuroimaging follow-up in a case of Rasmussen's encephalitis with dyskinesias.

We describe a case of adult-onset biphasic Rasmussen's encephalitis who presented seizures and left dyskinesias at the onset and, after 1 year, language disorder. Serial MRI and [(18)F] FDG-PET scans were performed showing involvement of the right cerebral hemisphere in the first phase and of the contralateral one in the second.