Skip to main content
. Author manuscript; available in PMC: 2010 Sep 1.
Published in final edited form as: Exp Neurol. 2009 Feb 10;219(1):66–73. doi: 10.1016/j.expneurol.2009.01.024

Figure 2.

Figure 2

Electromyographic (EMG) recordings from the left and right hemidiaphragm of postnatal rats after a complete left C2 spinal cord hemisection showing activity on both sides of the diaphragm. A) The spontaneous crossed phrenic activity which drives the left hemidiaphram after left C2 hemisection was expressed in a P2 neonatal rat. Arrows show the crossed activity in ventral, lateral, and dorsal parts of the left hemidiaphragm. B) The spontaneous crossed phrenic activity (arrow) is only expressed in the ventral part of the left hemidiaphragm of a P7 hemisected rat. No crossed phrenic activity was expressed at the lateral, or dorsal parts of the left hemidiaphragm. This pattern of crossed phrenic activity was also observed at P14, P21 and P28. C) EMG recordings from the left and right hemidiaphragm of a P35 hemisected rat. No spontaneous crossed activity was observed in the ventral, lateral, and dorsal parts of the left hemidiaphragm. This reflects the adult rat pattern in which no crossed phrenic activity is expressed after ipsilateral spinal cord hemisection.