Related Experiment Videos
Dopaminergic pathways in the rat central nervous system and rotational behavior
Pharmacology, Biochemistry, and Behavior
|August 1, 1979
Summary
Unilateral brain lesions in specific areas like the substantia nigra or globus pallidus cause distinct rotational behaviors. Lesion location, not just neurotransmitter levels, significantly impacts motor disturbances.
Area of Science:
- Neuroscience
- Neurobiology
- Motor Control
Background:
- Unilateral lesions of the substantia nigra or ventral tegmental area induce ipsilateral rotational behavior.
- Lesions in the globus pallidus result in contralateral rotations.
Purpose of the Study:
- To investigate the relationship between neurotransmitter alterations and motor asymmetry after specific brain lesions.
- To determine the impact of lesion site and extent on motor disturbances.
Main Methods:
- Induction of unilateral lesions in the substantia nigra, ventral tegmental area, or globus pallidus.
- Assessment of rotational behavior following apomorphine stimulation.
- Quantification of dopamine and noradrenaline levels using radiometric microassay.
Main Results:
- Ipsilateral rotations observed after substantia nigra/ventral tegmental area lesions.
- Contralateral rotations observed after globus pallidus lesions.
- No strong correlation found between neurotransmitter depletion and motor asymmetry.
Conclusions:
- The site and extent of the lesion are critical determinants of motor disturbances.
- Neurotransmitter levels alone do not fully explain the observed motoric asymmetry.