The use of the human steady-state evoked potential (SSEP) as a possible measure of mental-state estimation is explored. A method for evoking a visual response to a sumof-ten sine waves is presented. This approach provides simultaneous multiple frequency measurements of the human EEG to the evoking stimulus in terms of describing functions (gain and phase) and remnant spectra. Ways in which thes...

Objective: To evaluate the value of continuous electroencephalography (EEG) in early prognostication in patients treated with hypothermia after cardiac arrest. Design: Prospective cohort study. Setting: Medical Intensive Care Unit (ICU). Patients: Sixty patients admitted to the ICU for therapeutic hypothermia after cardiac arrest. Intervention: None. Measurements and Main Results: In all patien...

STUDY DESIGN A level III retrospective comparative study. OBJECTIVE Assess the clinical efficacy of somatosensory-evoked potential (SSEP) spinal cord monitoring (SCM) in Rett syndrome patients undergoing scoliosis surgery. SUMMARY OF BACKGROUND DATA The role of SCM in neuromuscular scoliosis is less accurate compared with idiopathic scoliosis because of the nature of the neuropathic or myop...

BACKGROUND We hypothesized that the addition of dexmedetomidine in a clinically relevant dose to propofol-remifentanil anesthesia regimen does not exert an adverse effect on motor-evoked potentials (MEP) and somatosensory-evoked potentials (SSEP) in adult patients undergoing thoracic spinal cord tumor resection. METHODS Seventy-one adult patients were randomized into three groups. Propofol gr...

Abstract The quantum symmetric simple exclusion process (Q-SSEP) is a model for stochastic dynamics of fermions hopping along the edges graph with Brownian noisy amplitudes and driven out-of-equilibrium by injection-extraction processes at few vertices. We present solution invariant probability measure one dimensional Q-SSEP in infinite size limit constructing steady correlation functions syste...

OBJECTIVES Somatosensory evoked potentials (SSEPs) and brainstem auditory evoked potentials (BAEPs) have been increasingly utilised during surgery for intracranial aneurysms to identify cerebral ischaemia. Between July 1994 and April 1996, we surgically treated 70 aneurysms in 49 consecutive patients (58 operations) with the aid of intraoperative evoked potential monitoring. This study sought t...

BACKGROUND Anoxic coma following cardiac arrest is a common problem with ethical, social, and legal consequences. Except for unfavorable somatosensory-evoked potentials (SSEP) results, predictors of unfavorable outcome with a 100% specificity and a high sensitivity are lacking. The aim of the current research was to construct a clinical and EEG scoring system that predicts early cortical respon...

BACKGROUND The reliability of some methods of neurological prognostication after out-of-hospital cardiac arrest has been questioned since the introduction of induced hypothermia. The aim of this study was to determine whether different treatment temperatures after resuscitation affected the prognostic accuracy of clinical neurological findings and somatosensory evoked potentials (SSEP) in comat...

Temperature fluctuations significantly impact neurological injuries in intensive care units. As the benefits of therapeutic hypothermia continue to unfold, many of these discoveries are generated by studies in animal models undergoing experimental procedures under the influence of anesthetics. We studied the effect of induced hypothermia on neural electrophysiological signals of an uninjured br...

A sustained sensory stimulus with a periodic variation of intensity creates an electrophysiological brain response at associated frequencies, referred to as the steady-state evoked potential (SSEP). The SSEPs elicited by stimulation nociceptors in skin may represent activity network that is primarily involved nociceptive processing. Exploring behavior this could lead valuable insights regarding...