Summary
Intrathecal baclofen is effective in reducing polysynaptic spinal reflexes in awake rabbits. A single lumbar infusion of 2.5–5.0 ng drug caused a significant reduction in the crossed extensor response to electrical stimulation of the plantar surface of the hindlimb. This inhibition lasted 5 h or more. At doses of 3 μ or less, the forelimbs were unaffected.
Similar content being viewed by others
References
Ault B, Evans RH (1981) The depressant action of baclofen on the isolated spinal cord of the neonatal rat. Eur J Pharmacol 71: 357–364
Faigle JW, Keberle H (1972) The chemistry and kinetics of Lioresal. Postgrad Med J 48 (Suppl 5): 9–13
Knutsson E, Lindblom U, Martensson A (1974) Plasma and cerebrospinal fluid levels of baclofen (Lioresal) at optimal therapeutic responses in spastic paresis. J Neurol Sci 23: 473–484
Otsuka M, Yanagisawa M (1980) The effects of substance P and baclofen on motoneurones of isolated spinal cord of the newborn rat. J Exp Biol 89: 201–214
Shahani BT, Young RR (1980) The flexor reflex in spasticity. In: Feldman RG, Young RR, Koella WP (eds) Spasticity: disordered motor control. Symposia Specialists, Miami, pp 287–295
Sherrington CS (1910) Flexion-reflex of the limb, crossed extension reflex, and reflex stepping and standing. J Physiol (Lond) 40: 28–121
Wilson PR, Yaksh TL (1978) Baclofen is antinociceptive in the spinal intrathecal space of animals. Eur J Pharmacol 51: 323–330
Yaksh TL, Reddy SVR (1981) Studies in the primate on the analgetic effects associated with intrathecal actions of opiates, alpha-adrenergic agonists and baclofen. Anesthesiology 54: 451–467
Yaksh TL, Rudy TA (1976) Chronic catheterization of the spinal subarachnoid space. Physiol Behav 17: 1031–1036
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kroin, J.S., Penn, R.D., Beissinger, R.L. et al. Reduced spinal reflexes following intrathecal baclofen in the rabbit. Exp Brain Res 54, 191–194 (1984). https://doi.org/10.1007/BF00235831
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00235831