OBJECTIVE We applied paired transcranial magnetic stimulation (pTMS) to patients with post-traumatic stress disorder (PTSD) secondary to minor accidental head trauma. Our purpose was to determine the potential abnormality of motor cortex excitability in this pathologic condition. METHODS pTMS stimulation, according to the conditioning-test paradigm employing interstimulus intervals (ISIs) of ...

Over a 30-year period, 29 cases of antimalarial retinal toxicity were studied in a tertiary medical center. Three cases of chloroquine and 26 cases of hydroxychloroquine toxicity were studied. A number of these cases were studied before multifocal electroretinogram (mfERG) became available and show how insensitive the corneal full-field flash ERG is in diagnosing this condition. It became appar...

BACKGROUND Previous studies have demonstrated inconsistent neurophysiologic effects of ketamine, although discrepant findings might relate to differences in doses studied, brain regions analyzed, coadministration of other anesthetic medications, and resolution of the electroencephalograph. The objective of this study was to characterize the dose-dependent effects of ketamine on cortical oscilla...

Intraoperative neurophysiologic monitoring (INM) is effective method to prevent operation-related nerve damage in various kinds of neurosurgery. In skull base surgery, there a possibility iatrogenic extraocular cranial nerves (EOCNs), which can be prevented with proper INM. We report case chondroma involving clivus and compressing pons who had intraoperative EOCN using the percutaneous needle i...

STUDY DESIGN The intraoperative findings of the local pressure of the intervertebral foramen and the electrophysiologic values of the spinal nerve roots were evaluated. OBJECTIVE To investigate the neurophysiologic changes of the spinal nerve roots in the vertebral foramen. SUMMARY OF BACKGROUND DATA As far as we know, few reports have so far described the neurophysiologic changes of the sp...

The goals of this study were (i) to assess the replicability of the "perceptual magnet effect" [Iverson and Kuhl, J. Acoust. Soc. Am. 97(1), 553-561 (1995)] and (ii) to investigate neurophysiologic processes underlying the perceptual magnet effect by using the mismatch negativity (MMN) auditory evoked potential. A stimulus continuum from /i/ to /e/ was synthesized by varying F1 and F2 in equal ...

The goal of this study was to examine the neural encoding of voice-onset time distinctions that indicate the phonetic categories /da/ and /ta/ for human listeners. Cortical Auditory Evoked Potentials (CAEP) were measured in conjunction with behavioral perception of a /da/-/ta/ continuum. Sixteen subjects participated in identification and discrimination experiments. A sharp category boundary wa...