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Neurorehabilitation and Neural Repair
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Spontaneous Functional Recovery in a Paralyzed Hemidiaphragm Following Upper Cervical Spinal Cord Injury in Adult Rats

Kwaku D. Nantwi

Ashraf A. El-Bohy

Gregory W. Schrimsher

Paul J. Reier

Harry G. Goshgarian

Previous studies have shown that latent respiratory pathways can be activated by as phyxia or systemic theophylline administration to restore function to a hemidiaphragm paralyzed by C2 spinal cord hemisection in adult female rats. Based on this premise, electrophysiologic recording techniques were employed in the present investigation to first determine qualitatively whether latent respiratory pathways are activated spon taneously following prolonged post hemisection periods (4-16 weeks) without any therapeutic intervention. Our second objective in a separate group of hemisected an imals was to quantitate any documented functional recovery under the following stan dardized recording conditions: bilateral vagotomy, paralysis with pancuronium bro mide, artificial ventilation, and constant PCO 2 (maintained at 25 mmHg).

Neurorehabilitation and Neural Repair, Vol. 13, No. 4, 225-234 (1999)
DOI: 10.1177/154596839901300404
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