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Behavioural consequences of frontal cortex grafts and enriched environments after sensorimotor cortex lesions
M A Christie1, J C Dalrymple-Alford
1Department of Psychology, University of Canterbury, Christchurch, New Zealand.
Journal of Neural Transplantation & Plasticity
|January 1, 1995
Summary
Fetal frontal cortex grafts aided sensorimotor cortex lesion recovery in rats, improving beam-walking skills. Postoperative enrichment also reduced severe foot slips, but grafts specifically enhanced overall recovery.
Area of Science:
- Neuroscience
- Regenerative Medicine
- Behavioral Neuroscience
Background:
- Sensorimotor cortex lesions pose challenges for graft survival and behavioral recovery.
- Previous research indicates difficulties in achieving successful outcomes after such lesions.
Purpose of the Study:
- To investigate the efficacy of fetal frontal cortex grafts in promoting behavioral recovery after sensorimotor cortex lesions in rats.
- To assess the impact of an enriched environment on graft survival and functional recovery.
Main Methods:
- Adult female rats with unilateral sensorimotor cortex lesions were housed in standard or enriched environments.
- Fetal frontal cortex suspension grafts were transplanted one month post-lesion.
- Beam-walking skills were assessed for six weeks post-grafting to evaluate recovery.
Main Results:
- Graft survival was achieved despite a one-month delay between lesion and transplantation.
- Postoperative enrichment prevented severe foot slips during retraining but did not influence graft volume.
- Frontal grafts enhanced beam-walking recovery by reducing foot slips, suggesting graft-derived trophic influences.
Conclusions:
- Fetal frontal cortex grafts can survive and promote functional recovery after sensorimotor cortex lesions, even with a delayed transplantation.
- While environmental enrichment aids in mitigating severe motor deficits, direct graft-derived influences appear crucial for enhancing overall motor skill recovery.