Current opinion in neurology
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The current literature on medication overuse headache will be reviewed with regard to clinical presentation, pathophysiology, therapy and prognosis in the light of the new headache classification. ⋯ The newly available data on medication overuse headache may provide the basis for future consensus guidelines for the management of this condition.
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This review describes rare headaches that can occur at night or during sleep, with a focus on cluster headaches, paroxysmal hemicrania, short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing, hypnic headache and exploding head syndrome. ⋯ There is growing evidence that cluster headache and hypnic headache are chronobiological disorders.
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Since the initial description of cortical spreading depression by Leao, evidence that cortical spreading depression is the underlying pathomechanism of migraine aura has increased. The purpose of this review is to describe the ultimate genetic and molecular mechanisms of migraine aura. ⋯ Recent studies have helped unravel the basic mechanisms involved in migraine aura. Far from being a simple phenomenon, a sequence of events leads from the cortex to the activation of pain-sensitive structures. The role of the brainstem is still poorly described. The identification of target molecules may provide new therapies.
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Imaging the penumbra is essential, not only to identify patients who might benefit from thrombolysis, but also to further understanding of the ischaemic process, thereby potentially revealing new opportunities for therapeutic intervention. Here we review recent imaging studies of the acute stroke process. ⋯ The goal of understanding the complex process that is acute ischaemia in stroke, and subsequently the development of therapeutic strategies, continues to be advanced by imaging the penumbra in novel ways.
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To review recent clinical data on ischemic optic neuropathies, which are some of the most frequently encountered optic neuropathies. These disorders include nonarteritic anterior ischemic optic neuropathy, arteritic anterior ischemic optic neuropathy, and posterior ischemic optic neuropathy. ⋯ Application of the studies described in this paper should allow the clinician to more accurately diagnose ischemic optic neuropathies and counsel the patient with regard to appropriate management, prognosis for visual recovery and future risk of recurrence.