Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology
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Activation of the trigeminovascular system and sensitisation of brainstem trigeminal nuclei are thought to play an important role in migraine. The aim of this study was to investigate the blink reflex and its habituation in patients with "chronic migraine". ⋯ The blink reflex and its habituation may help shed light on the subtle neurophysiological changes that occur in migraine patients between and during attacks.
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Randomized Controlled Trial
Cervical spine manipulation alters sensorimotor integration: a somatosensory evoked potential study.
To study the immediate sensorimotor neurophysiological effects of cervical spine manipulation using somatosensory evoked potentials (SEPs). ⋯ This study suggests that cervical spine manipulation may alter cortical somatosensory processing and sensorimotor integration. These findings may help to elucidate the mechanisms responsible for the effective relief of pain and restoration of functional ability documented following spinal manipulation treatment.
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The development of a novel collision technique for assessment of the activation order of electrically activated nerve fibers, which is an important question in functional electrical therapy or for interpretation of results of motor unit number estimates. ⋯ The excessive fatigue seen with nerve electrical stimulation can be explained by a preferential activation of large diameter nerve fibers. The motor units first activated with electrical stimulation are likely not representative of the motor unit pool in the muscle, which poses limitations in the reliability of some of the proposed methods for motor unit counting.
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To study whether the nociceptive withdrawal reflex (WR) and pain sensation are differentially affected by supraspinal modulation and to determine the nature of this modulation. ⋯ The experimental setup and subjects' mental state should be considered when interpreting changes in the WR. Extreme caution should be employed when utilizing reflexive indices as a measure of pain. Verbal report seems a more suitable tool to evaluate pain since it is relatively stable with repeated measurements and in accordance with stimulation intensity.