Spontaneous bodily rotations and direction of locomotion at different times after radio frequency lesions at sites in and near the substantia nigra
| Autor: | Anne M. Danks, Robert L. Isaacson, Jan H. Brakkee, A. Beate Oestreicher, Willem Hendrik Gispen |
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| Rok vydání: | 1988 |
| Předmět: |
Male
medicine.medical_specialty Time Factors Radio Waves Experimental and Cognitive Psychology Substantia nigra Motor Activity Open field Midbrain Lesion Behavioral Neuroscience chemistry.chemical_compound Dopamine medicine Animals Neurotransmitter business.industry Rats Inbred Strains Body movement Anatomy Forward locomotion Rats Surgery Substantia Nigra chemistry medicine.symptom business Locomotion medicine.drug |
| Zdroj: | Physiology & Behavior. 44:199-204 |
| ISSN: | 0031-9384 |
| Popis: | Rats were prepared with radio frequency lesions of the dorsolateral or ventromedial regions of the substantia nigra. Other rats were prepared as operated and unoperated controls for each type of lesion. Their behavior was evaluated in an open field at postoperative days 2, 7, 10, and 15. Three types of behavorial changes were observed over time: those noticeable for a brief period, i.e., a few days, after the lesion (rotational behavior), those lasting 7–10 days after the lesion (turning preferences) and those lasting through the end of the experiment that may be permanent (enhanced locomotion). The early effect of the medioventral lesions was pronounced contralateral rotation while the early effect of the dorsolateral lesion was ipsilateral rotation. This effect of the dorsal lateral lesions was reversed on test days 7 and 10. Lesion-induced turning changes associated with forward locomotion were observed on these two test days as well. By 15 days after surgery the only demonstrable effect of either lesion was enhanced locomotion. The results are discussed in terms of various theories of substantia nigra regulation of motor activities. |
| Databáze: | OpenAIRE |
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