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Source: Clinical Neurophysiology
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Total 347 results found since Jan 2013.
11. “Two is better than one”? Simultaneous monitoring of multichannel somatosensory evoked potentials and electroencephalogram during carotid endarterectomy
In carotid endarterectomy (CEA), EEG and somatosensory evoked potentials (SEPs) are the most commonly used monitoring techniques to prevent perioperative stroke. However, which of these methods is the most appropriate is not definitely established. Here we evaluated retrospectively simultaneous EEG and SEP recordings. Our CEA series was analyzed backward to identify 30 patients requiring carotid shunt. Shunting was performed in 7.1% of 420 consecutive CEA over a 20-month period. All CEAs were continuously monitored by multi-channel EEG and SEPs before, during and 20min following carotid cross-clamping. The most reliable SE...
Source: Clinical Neurophysiology - October 21, 2013 Category: Neuroscience Authors: C. Cardinali, D. Battista, E. Del Sordo, S. Colon, N. Cellai, R. Mazzeo, E. Sirabella, S. Michelagnoli, F. Passuello, L. Ercolini, E. Barbanti, E. Chisci, P. Frosini, A. Lenzi, A. Molisso, L. Tramacere, A. Borgheresi, P. Vanni, M. Piccininni, G. Zaccara, Tags: Society Proceedings Source Type: research
Reply to “Perception of lower extremity loading in stroke”
As reflected by the comments of Kumar et al. (2014), there is an increasing interest in developing quantitative measurements of complex sensorimotor behaviors in people with neurologic injury or disease. In concept, our manuscript “Perception of lower extremity loads in stroke survivors” addresses one of these behaviors, which is likely to be important to gait function in stroke survivors. While we believe that impairment in load perception plays an important role in gait, Kumar et al. raise many important issues related to interpreting data from testing paradigms with higher complexity, and in extrapolating these labo...
Source: Clinical Neurophysiology - October 27, 2014 Category: Neuroscience Authors: Virginia W. Chu, T. George Hornby, Brian D. Schmit Tags: Letter to the Editor Source Type: research
The P300 in middle cerebral artery strokes or hemorrhages: outcome predictions and source localisation
Stroke is the leading cause of disability and is the third leading cause of death worldwide (Murray and Lopez, 1997). According to the World Health Organisation, a total of 15 million people suffer a stroke each year. Strokes can principally be classified into two main categories, ischemic and hemorrhagic (Donnan et al., 2008). 85 % of all strokes are of ischemic origin (Qureshi et al., 2001) and most commonly occur within the territory of the middle cerebral artery (MCA). The MCA supplies the lateral portion of the cerebral cortex (about 60 % - 70 % of the hemisphere).
Source: Clinical Neurophysiology - November 1, 2014 Category: Neuroscience Authors: Mana R. Ehlers, Carmen López Herrero, Andreas Kastrup, Helmut Hildebrandt Source Type: research
The P300 in middle cerebral artery strokes or hemorrhages: Outcome predictions and source localization
Stroke is the leading cause of disability and is the third leading cause of death worldwide (Murray and Lopez, 1997). According to the World Health Organisation, a total of 15 million people suffer a stroke each year. Strokes can principally be classified into two main categories, ischemic and hemorrhagic (Donnan et al., 2008). 85% of all strokes are of ischemic origin (Qureshi et al., 2001) and most commonly occur within the territory of the middle cerebral artery (MCA). The MCA supplies the lateral portion of the cerebral cortex (about 60–70% of the hemisphere).
Source: Clinical Neurophysiology - November 1, 2014 Category: Neuroscience Authors: Mana R. Ehlers, Carmen López Herrero, Andreas Kastrup, Helmut Hildebrandt Source Type: research
Stimulation site and phase modulation of the withdrawal reflex during gait initiation
Muscular activity, neural mechanisms, and biomechanical forces are highly integrated in the gait initiation process (GIP) (Mann et al., 1979). In this complex process, forces generated by the legs serve to limit postural perturbations and provide forward propulsion. However, in patients with Parkinson’s disease (PD) or stroke, this process is sometimes disrupted (Hesse et al., 1997; Hass et al., 2005). In particular, people who suffered a stroke often have problems generating force in the starting leg and difficulties to load the limbs symmetrically during gait initiation (Brunt et al., 1995).
Source: Clinical Neurophysiology - February 14, 2015 Category: Neuroscience Authors: Miguel A. Richard, Erika G. Spaich, Mariano Serrao, Ole K. Andersen Source Type: research
P99. Predictors of new cerebral microbleeds in patients with antiplatelet drug therapy
Cerebral microbleeds (CMBs) are an MRI marker of vascular damage in the brain and are associated with an increased risk for ischemic and especially hemorrhagic stroke. CMBs are known to be more prevalent in patients who take antiplatelet drug therapy, which is commonly used for secondary prevention in patients with ischemic stroke. The aim of the present study was to evaluate the usefulness of susceptibility weighted imaging (SWI) to identify patients at high risk for the development of new CMBs under antiplatelet drug therapy.
Source: Clinical Neurophysiology - July 5, 2015 Category: Neuroscience Authors: K. Menzler, M. Hausdörfer, C. Mayer, M. Belke, A. Gerstner, M. Teepker, R. Werner, H. Hamer, W. Oertel, F. Rosenow, S. Knake Source Type: research
P5. Acute versus chronic lesion mapping: Methodological considerations from a study of arm motor functions
The method of lesion analysis is a tool widely used in cognitive neuroscience to conduct group studies with stroke patients associating cognitive dysfunctions with brain lesions. Although modern statistical lesion analysis (voxel wise lesion symptom mapping, VLSM) is an established tool there is still a lively debate about the time between stroke onset, neuroimaging and the assessment of cognitive functions. There are several reasons supporting acute/subacute or chronic neuroimaging or functional assessment.
Source: Clinical Neurophysiology - July 5, 2015 Category: Neuroscience Authors: J. Rennig, H. Planert, H.-O. Karnath Source Type: research
The role of neurovascular ultrasound in intensive care units
The neurovascular ultrasound methods are cheap and noninvasive methods that are performed at the bedside of critically ill patients. Transcranial Doppler sonography (TCD), transcranial color Doppler sonography (TCCD) and ultrasound examination of the neck vessels can provide valuable information for timely treatment decisions. In patients with acute stroke, TCD can detect intracranial arterial steno-occlusive disease and presence of collateral flow. The recanalization rate after reperfusion treatment can be monitored with serial TCD recordings in acute ischemic stroke.
Source: Clinical Neurophysiology - August 9, 2015 Category: Neuroscience Authors: D. Jovanović, M. Stefanović Budimkić Source Type: research
Repetitive transcranial magnetic stimulation for rehabilitation of poststroke dysphagia: A randomized, double-blind clinical trial
Dysphagia is a common and potentially fatal complication following stroke (Martino et al., 2005). It afflicts a large number of patients with hemispheric stroke (Martino et al., 2005) and brain-stem infarction (Horner et al., 1991). Poststroke dysphagia is associated with an increased risk of mortality, and it may lead to severe complications including malnutrition, dehydration, and aspiration pneumonia (Teasell et al., 1994; Dziewas et al., 2004; Martino et al., 2005). Most patients recover from dysphagia within a few weeks, but the extent of recovery of swallowing varies widely from patient to patient (Martino et al., 2005).
Source: Clinical Neurophysiology - December 10, 2015 Category: Neuroscience Authors: Juan Du, Fang Yang, Ling Liu, Jingze Hu, Biyang Cai, Wenhua Liu, Gelin Xu, Xinfeng Liu Source Type: research
EP 8. The role of contralesional motor areas in early motor recovery – evidence from event-related (“online”) TMS
TMS studies examining the role of the unaffected hemisphere in motor function after stroke have mainly focused on the contralesional primary motor cortex (M1), revealing both supporting (Lotze et al., 2006; Rehme et al., 2011) as well as disturbing (Vollmer et al., 2015; Nowak et al., 2008) influence for recovery of function. However, the relevance of other contralesional motor areas for paretic hand function has rarely been examined, especially with respect to motor recovery in the first days and weeks after stroke.
Source: Clinical Neurophysiology - August 5, 2016 Category: Neuroscience Authors: K. Lemberg, C. Tscherpel, L. Hensel, M. Vollmer, L. Volz, G. Fink, C. Grefkes Source Type: research
P 145 Deficient body structural description in apraxia
Apraxia is a common cognitive deficit after left hemisphere (LH) stroke. It has been suggested that a disturbed representation of the human body underlies apraxic deficits. Thus, we here tested the hypothesis that a deficient body structural description (BSD), i.e., a deficient representation of a body part ”s position (relative to a standard human body), contributes to apraxia, while controlling for a deficient semantic representation of the human body (body image, BI) and aphasia.A quantitative pointing task to assess putative BSD deficits and an apraxia assessment including imitation and pantomime tasks were applied t...
Source: Clinical Neurophysiology - September 8, 2017 Category: Neuroscience Authors: H. Salimi Dafsari, A. Dovern, G.R. Fink, P.H. Weiss Tags: Poster Source Type: research
B-11. Application of EEG-based brain computer interface to movement and sensory disorders
To examine the effect of the EEG-based brain computer interface (BCI) training for patients with stroke, writer ’s cramp and neuropathic pain. Method: Using the EEG recorded with Ag/AgCl electrodes placed at C3 and C4, as designated according to the International 10/20 system, we gave real time visual feedback to the patients with PC monitor which is placed in front of them. Participants were required to im agine the affected wrist extending in stroke and neuropathic pain patients. Patients with writer’s cramp were requested to relax their wrist flexor while extending their wrist.
Source: Clinical Neurophysiology - March 30, 2018 Category: Neuroscience Authors: Tetsuo Ota Source Type: research
Toward gaze-independent brain-computer interfaces
The ability to communicate by speech, text or gestures is essential to human interaction. This ability is impaired in many people who are affected by debilitating neuromuscular disorders such as amyotrophic lateral sclerosis (ALS), brainstem stroke, or spinal cord injury. Conventional assistive devices (e.g., letter boards, cheek or tongue switches, or eye trackers) that aim to restore communication functions all require muscular control, which is often lost in the progress of neuromuscular disorders.
Source: Clinical Neurophysiology - March 6, 2013 Category: Neuroscience Authors: Peter Brunner, Gerwin Schalk Tags: Editorials Source Type: research
The three dimensional assessment of peripheral nerve injury: An integrated clinical, neurophysiologic and sonographic approach
“Time is brain,” a phrase common to neurologists, emphasizes the importance of immediate evaluation for acute stroke (). In the realm of peripheral nerve injury (PNI), the opportunity for acute diagnosis is often dictated by the temporal evolution of neurophysiologic findings, limiting the value of acute assessment. The findings of Padua et al. in this issue of Clinical Neurophysiology may increase the urgency to assess PNI (). PNI owing to traumatic and iatrogenic injury is quite common, with an incidence as high as 34% in traumatic brain injury patients () and is found in up to 5% of all patients admitted to trauma c...
Source: Clinical Neurophysiology - February 4, 2013 Category: Neuroscience Authors: Lisa D. Hobson-Webb, Vern C. Juel Tags: Editorials Source Type: research
