SSEP Test Review

SSEP Test Review electrical responses of the nervous system to sensory stimuli and are analyzed to assess the Integrity of portions of the nervous system - somatosensory evoked potentials SSEP's are recorded from both the Central and peripheral nervous systems True/False - True somatosensory evoked potentials only record short latency evoked potentials True/False - True short latency evoked potentials typically last less then 30 milliseconds and are resistant to changes in level of consciousness (True/False) - true list the pathway of the sensory system - external stimulus is sensed by the sensory receptors which send the peripheral nerves to the spinal cord then to the brainstem then to the primary cortex what are the three types of peripheral nerves? - motor sensory mixed motor and sensory sensory inputs enter the spinal cord via the posterior spinal roots and then first order neurons at the posterior root ganglion - ,,,,, what are the three types of sensory fibers? What is each responsible for? - slowest conducting: pain and touch medium slow conducting: touch and pressure fastest conducting: vibration and position sense pain sense - free nerve endings touch sense - merkel's discs and meissner's corpuscles vibration sense - pacinian corpuscles respond when skin is stretched - ruffini's corpuscles respond when muscles are stretched - neuromuscular spindles respond when tendons are stretched - neurotendinous spindles which of the following describes sensory? A. ascending B. descending C. efferent - A. ascending SSEP Pathways travel travel through the brainstem via the ________ lemniscus whereas BAEPs travel through the brainstem along the __________ lemniscus - medial; lateral what is the reason that BAEPs and SSEPs are both used during intraoperative monitoring procedures? - medial and lateral lemniscus tracts are in close proximity and there by both subject to injury when are SSEPs performed? - typically in conjunction with BAEP and VEP most frequently requested to assist in the diagnosis or ruling out of multiple sclerosis or other demyelinating conditions used routinely and surgeries that place the sensory Pathways of the spinal cord at risk point is to stimulate the appropriate nerve that enters the spine at a level below the level or surgery, watch it travel through the level of surgery and can be recorded proximal and sensory cortex describe the optimal diagnostic setting for the