Somatosensory responses can be acquired by providing surface electrical stimulation to a patient’s upper or lower limbs. This procedure is useful to determine the integrity of the somatosensory pathways as well as help diagnose the nature of any possible sensory impairment. The Somatosensory modality is available to SmartEP on the USB hardware platform.
The SmartEP AAR addon module allows the user to fully define the timeline of events in regard to stimulation and acquisition; from mixing two stimuli in one ear, to inserting offsets in the presentation or acquisition. This Smart Note covers some basic concepts to help with understanding on how to use this module. AAR is commonly used to acquire complex ABR (cABR), frequency-following responses (FFR), Auditory Change Complex (ACC), and… Read More »Using the SmartEP Advanced Auditory Research Module
Chained Stimuli is a method of acquiring AEP responses at multiple intensities in a concurrent manner. When stimulating using this method, the different stimulus intensities are presented either in a sequence or randomly. The method is useful when running a threshold search. This Smart Note includes information about electrode placement, acquisition parameters, and peak markings. This guidance applies for the Duet, USB, USBLite, and Solo hardware platforms.
Visual Evoked Potentials are responses from the cerebral cortex elicited by visual stimulation. These responses are evoked using visual patterns on a light array covering a particular area of the field of view, and are acquired using surface electrodes from the patient’s scalp. VEP testing can help provide information about conditions such as opticneuritis, optic tumors, retinal disorders, and demyelinating diseases. This Smart Note describes suggested electrode placement, acquisition parameters,… Read More »Visual Evoked Potentials using SmartEP
Notched noise masking is an ipsilateral masking noise with special characteristics, more specifically, a gap in the frequency spectrum, usually corresponding to the same frequency as the stimulus. This type of noise can help isolate frequency regions in the cochlea and aid in evaluating acoustic nerve function. This Smart Note covers topics such as suggested electrode placement, stimulus and acquisition setup parameters, and analysis. Notched noise masking is available as… Read More »Notched Noise masking using SmartEP
After fitting a patient with a new Cochlear Implant, it is necessary to obtain an objective measure of the auditory capabilities provided by the implant. An eABR measurement will provide information about adjustments to the implant, needed to bring the patient’s hearing to the expected level. This Smart Note outlines the general steps to take then and electrical auditory brainstem response for implanted patients as it related to SmartEP. Consult… Read More »Acquiring a Cochlear Implant eABR using SmartEP
This Smart Note outlines the basic considerations that system administrators and IT personnel must keep in mind for computers that use the IHS applications. These include the requirements and considerations for administrative access for specific folders, location of patient data, identification of files that contain PHI, Encryption, and Antivirus.
Vestibular evoked myogenic potentials (VEMPs) are short-latency electromyograms (EMGs) recorded via surface electrodes from muscles in the neck or below the eye, in response to acoustic stimuli presented at relatively high levels. VEMP testing for normal saccular/IVN function, when combined with the right battery of tests, can provide valuable diagnostic information about conditions such as Meniere’s disease, vestibular labyrinthitis, Tullio phenomenon, and more. This Smart Note describes suggested electrode placement,… Read More »Acquiring Vestibular Evoked Myogenic Potentials using SmartEP
P300 and Mismatched Negativity responses may be used to obtain very useful information about neuro-degenerative and neuro-pathological changes, especially in the language and information processing areas of the brain. These techniques are especially helpful to test patients with aphasia, dyslexia, Parkinson’s disease, Alzheimer’s disease and other attention problems. This Smart Note describes suggested electrode placement, acquisition parameters, eye-blink artifact rejection, and analysis methods, for use with SmartEP in the Duet and USB hardware platforms.
Late Latency Responses, also known as ALR, are components of the auditory evoked potential response. The LLR response is found between 50 and 250 milliseconds from the time of stimulation, and appear to reflect the response of the auditory cortex. LLR testing can help determine the amount and type of hearing loss at specific frequencies, as well as provide information about the presence of nervous system abnormalities, particularly referring to… Read More »Acquiring Late Latency Responses using SmartEP