PCL102H1 Lecture Notes - Vestibulospinal Tract, Dystonia, Corticospinal Tract
Document Summary
537-543, 533-540 (bg disorders); olanow (therapy); dunnett et al. (early transplant article); bergman et al. (early dbs/surgery article) Motor system produces movement: we"re going to focus on voluntary movement through striate muscles. Motor neuron: neuron in ventral horn of spinal grey that attaches to the muscles ( primary motor neuron, motor neurons are down in ventral horn of spinal cord. Motor neurons can be defined in two ways. Strictest definition is a neuron in the ventral horn of spinal grey that attaches to the muscles. So runs from cell body in ventral horn of spinal grey out through the ventral root out through the muscles and synapses directly on the muscle. If you want to define it he says 3 synapses. But perhaps a better definition is that it yields motor evoked potentials. We talked about evoked potentials earlier, we had evoked potentials used to measure velocity of the nerves, the peripheral nerves, so called compound potential.
