ABSTRACT
No abstract available.
Subject(s)
Apraxias , Parkinson Disease , Transcranial Magnetic StimulationABSTRACT
Giant arachnoid granulations have been reported to be associated with headaches, which can be acute or chronic in presentation. In some cases, idiopathic intracranial hypertension, previously called pseudotumor cerebri, may occur. The pathophysiology of these enlarged structures seen as filling defects on imaging is not clearly defined, although they are presumed to cause symptoms such as headache via pressure resulting from secondary venous sinus obstruction. We present a unique presentation of secondary headache in a 39-year-old man with no prior history of headaches found to have giant arachnoid granulations, presenting as migraine with aura.
Subject(s)
Adult , Humans , Arachnoid , Epilepsy , Headache , Migraine Disorders , Migraine with Aura , Pseudotumor CerebriABSTRACT
Praxis, the ability to perform skilled or learned movements is essential for daily living. Inability to perform such praxis movements is defined as apraxia. Apraxia can be further classified into subtypes such as ideomotor, ideational and limb-kinetic apraxia. Relevant brain regions have been found to include the motor, premotor, temporal and parietal cortices. Apraxia is found in a variety of highly prevalent neurological disorders including dementia, stroke and Parkinsonism. Furthermore, apraxia has been shown to negatively affect quality of life. Therefore, recognition and treatment of this disorder is critical. This article provides an overview of apraxia and highlights studies dealing with the neurophysiology of this disorder, opening up novel perspectives for the use of motor training and noninvasive brain stimulation as treatment.
Subject(s)
Apraxias , Brain , Dementia , Nervous System Diseases , Neurophysiology , Parietal Lobe , Parkinsonian Disorders , Quality of Life , StrokeABSTRACT
No abstract available.
Subject(s)
Histiocytic Necrotizing Lymphadenitis , Meningitis, AsepticABSTRACT
There is an emergent need for imaging methods to better triage patients with acute stroke for tissue-plasminogen activator (tPA)-mediated thrombolysis or endovascular clot retrieval by directly visualizing the size and distribution of cerebral thromboemboli. Currently, magnetic resonance (MR) or computed tomography (CT) angiography visualizes the obstruction of blood flow within the vessel lumen rather than the thrombus itself. The present visualization method, which relies on observation of the dense artery sign (the appearance of cerebral thrombi on a non-enhanced CT), suffers from low sensitivity. When translated into the clinical setting, direct thrombus imaging is likely to enable individualized acute stroke therapy by allowing clinicians to detect the thrombus with high sensitivity, assess the size and nature of the thrombus more precisely, serially monitor the therapeutic effects of thrombolysis, and detect post-treatment recurrence. This review is intended to provide recent updates on stroke-related direct thrombus imaging using MR imaging, positron emission tomography, or CT.
Subject(s)
Humans , Angiography , Arteries , Magnetic Resonance Imaging , Methods , Positron-Emission Tomography , Recurrence , Stroke , Therapeutic Uses , Thrombosis , Tomography, X-Ray Computed , TriageABSTRACT
No abstract available.