OBJECTIVE The purpose of our study is to evaluate the success rate and feasibility of intraoperative neuromonitoring (IONM) focusing on transcranial motor evoked potential (TcMEP) monitoring for patients with preoperative motor weakness in spine surgery. METHODS Between November 2011 and December 2013, TcMEP and somatosensory evoked potential (SSEP) monitoring were attempted in 130 consecutiv...

Precise determination of residual hearing in prospective cochlear implant candidates is essential. As the minimum age of implantation for young children has reduced, the use of objective measures of hearing has become more important. At the University of Melbourne Cochlear Im­ plant Clinic, steady state evoked potential (SSEP) assessments are rou­ tinely carried out on all candidates under the ...

PURPOSE To assess the cerebral oximeter, which measures regional oxygen saturation (rSO2) continuously and noninvasively, as a cerebral monitor during carotid endarterectomy (CEA). The rSO2 was compared with Somatosensory Evoked Potentials (SSEPs) as an indicator for shunting and as a predictor of postoperative neurological deficits. METHODS Seventy-two consenting patients undergoing CEA with...

We have studied the effects of a single i.v. dose of sufentanil 5 micrograms kg-1 in combination with pancuronium on the median nerve short latency somatosensory evoked potentials (SSEP) in 15 unpremedicated patients undergoing thoracic or lumbar spinal surgery. The latency and amplitude of the SSEP response over the second cervical vertebra (SC) and sensory cortex (P17, N20, P25), heart rate a...

Methods Focused ultrasound exposures (10 ms bursts applied at 1 Hz for 60 s; pressure amplitude in water: 0.64-0.71 MPa) were delivered immediately after the administration of Definity microbubbles (20 or 40 μl/kg) to disrupt the BBB. The focal point was targeted to 10 overlapping targets on and around the somatosensory motor cortex (2 mm lateral, 2 mm posterior to bregma) under MRI guidance in...

The effect of propofol on somatosensory evoked potentials was assessed during different intra-operative stimuli in prolonged (greater than 2 h) abdominal operations. SSEP were used to evaluate the extent of block of sensory nerve conduction at the following stages: preinduction; during steady state anaesthesia; during traction of the mesentery; 10 min after anaesthesia. Propofol 100 micrograms ...

INTRODUCTION Diagnosis of chronic inflammatory demyelinating polyneuropathy (CIDP) remains uncertain when nerve conduction studies (NCS) fail to show demyelination. METHODS We conducted a retrospective study of patients who presented with clinical criteria of CIDP in whom electrodiagnostic (EDx) criteria of definite or probable CIDP were missing [axonal sensorimotor neuropathy (n = 23), norma...

Steady-state evoked potentials (SSEPs) are rhythmic brain responses to rhythmic sensory stimulation, and are often used to study perceptual and attentional processes. We present a data analysis method for maximizing the signal-to-noise ratio of the narrow-band steady-state response in the frequency and time-frequency domains. The method, termed rhythmic entrainment source separation (RESS), is ...

OBJECTIVES To compare prognostic factors and functional recovery between paraplegic patients with either ischaemic (28 patients) or traumatic (39 patients) spinal cord injury (SCI). METHODS On admission to the spinal injury centre and 6 months later the patients underwent clinical (following the guidelines set down by the American Spinal Injury Association) and electrophysiological (tibial an...

The prognostic value of magnetic evoked potentials (MEP), somatosensory evoked potentials (SSEP), age and radiological parameters was determined in 50 patients with acute middle cerebral artery infarction. We performed MEP and SSEP within 4 days and after 6 weeks and 3 months of the infarction and assessed clinical improvement by using the Barthel index (BI) and the Rankin scale. The localizati...