Diagnosis and development of screening items for migraine in neurological practice in Taiwan.

Background/purpose: The objectives of this study were to: (1) survey migraine diagnoses among neurological outpatients in Taiwan; (2) compare neurologists' migraine diagnoses with the International Classification of Headache Disorders 2nd Edition (ICHD-2) criteria; and (3) evaluate the diagnostic ability of screening items on a patient migraine questionnaire.

Methods: This prospective study surveyed patients who consulted neurologists for the first time with a chief complaint of headache, excluding those experiencing headaches for > or = 15 days/month. Each neurologist interviewed a maximum of 10 patients.

Forearm mixed nerve conduction velocity: questionable role in the evaluation of retrograde axonal atrophy in carpal tunnel syndrome.

The objective of this study was to determine whether forearm mixed nerve conduction velocity (Fmix) reflects the real conduction velocity of forearm motor nerve (Fmot) and forearm sensory nerve (Fsen) fibers passing through the carpal tunnel. Forearm mixed nerve conduction velocity is presumed to be indicative of the conduction velocity of the median nerve over the forearm. Therefore, Fmix is used widely to assess the causes of slowing forearm conduction velocity in carpal tunnel syndrome.

Does direct measurement of forearm mixed nerve conduction velocity reflect actual nerve conduction velocity through the carpal tunnel?

Objectives: The purpose of this study was to determine whether forearm (wrist-elbow) mixed nerve conduction velocity (W-Emix) represents the actual nerve conduction velocity (CV) of nerve fibers passing through the carpal tunnel.

Background: W-Emix is presumed to reflect the actual forearm CV through the carpal tunnel. However, it has been argued that W-Emix chiefly originates from the nerve fibers passing outside the carpal tunnel.

The cause of slowed forearm median conduction velocity in carpal tunnel syndrome: a Palmar stimulation study.

Objectives: To elucidate the etiopathogenesis of decreased forearm median motor conduction velocity (FMMCV) in carpal tunnel syndrome (CTS), we used segmental stimulation at the palm, wrist and antecubital fossa to determine conduction block at wrist and calculate and compare the segmental median motor conduction velocity (MMCV) to determine the pathogenesis.

Background: The cause of the decreased FMMCV in CTS remains unclear. Animal models have supported retrograde axonal atrophy as the cause.