Premium
Phrenic nerve conduction in infancy and early childhood
Author(s) -
Imai Tomihiro,
Shizukawa Hirohiko,
Imaizumi Hitoshi,
Shichinohe Yasuo,
Sato Morihito,
Kikuchi Seiya,
Hachiro Yoshikazu,
Ito Masayoshi,
Kashiwagi Motoi,
Chiba Susumu,
Matsumoto Hiroyuki
Publication year - 2000
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/(sici)1097-4598(200006)23:6<915::aid-mus11>3.0.co;2-t
Subject(s) - phrenic nerve , medicine , supraclavicular fossa , diaphragmatic breathing , thorax (insect anatomy) , anesthesia , intercostal space , intercostal nerves , anatomy , respiratory system , alternative medicine , pathology , cancer , breast cancer
Diaphragmatic action potentials (DAPs) were mapped on the thorax bilaterally in 16 neurologically normal infants and 8 boys aged 1 to 4 years during artificial ventilation after thoracic surgery. Transcutaneous stimulation was used to activate the phrenic nerve at the supraclavicular fossa at the end of an artificial inspiration. The DAPs were of positive polarity and were recorded on the ipsilateral anterolateral chest wall over the sixth to the eighth intercostal spaces, with a maximal peak at the seventh intercostal space. The DAP latencies gradually decreased from 6 to 8 ms at birth to about 5 ms at the age of 1 year, despite an increase of conduction distance. Statistical analyses revealed that DAP amplitude did not correlate with age. The latencies and amplitudes of the DAPs displayed little interside variation. The results are valuable not only as a reference for the diagnosis of patients with phrenic nerve palsy, but also as an indicator of the normal development of the phrenic nerve. © 2000 John Wiley & Sons, Inc. Muscle Nerve 23: 915–918, 2000