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- W2407084906 abstract "Objective: To evaluate changes of the spinal cord conductivity by investigating the cortical somatosensory evoked potentials (SEPs) after angular rotations of the cervical spine in the rats. Method: Ten rats (Sprague-Dawley, 300∼350 gm) were used. The trunk and head were fixed in the instrument for measuring rotational angles of the cervical spine. P1 latencies and P1-N1 amplitudes of the SEPs were obtained by stimulation of the posterior tibial nerve at the left hind paw. Thin scalp needle electrodes were placed subcutaneously at the 3 mm posterior to the vertex and nasion. We measured the parameters of the potentials at each 10o angular loading and compared the values measured immediately with those 5 minutes after each rotation. Results: P1 latencies were 19.9±5.5 msec at rest, 20.1±5.8 msec at 90o, 20.5±5.8 msec at 100o, 21.2± 6.2 msec at 120o and 21.7±6.1 msec at 130o, which were significantly prolonged above 100o rotational loadings (p＜0.05). The potentials disappeared at 140∼170o in some rats. The P1 latencies were prolonged according to increasing of the head rotational angles, however, P1-N1 amplitudes were not significantly decreased until absence of the potentials. There was no significant difference of the P1 latencies and P1-N1 amplitudes between potentials recorded immediately after rotational loading and at 5 minutes after rotation. Conclusion: P1 latencies of the SEPs according to the head rotation were significantly prolonged over 100o loadings in the rats. This result suggested possible impairment of the spinal cord conductivity over 100o rotational loading of the cervical spine in the rat. (J Korean Acad Rehab Med 2007; 31: 512-515)" @default.
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- W2407084906 date "2007-01-01" @default.
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- W2407084906 title "Changes of Cortical Somatosensory Evoked Potentials following Angular Rotations of the Cervical Spine in Rats" @default.
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