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Full-Text Articles in Medical Anatomy
Activation Of Long Descending Propriospinal Neurons In Cat Spinal Cord, Robert J. Adams, Robert D. Skinner, Ronald S. Remmel
Activation Of Long Descending Propriospinal Neurons In Cat Spinal Cord, Robert J. Adams, Robert D. Skinner, Ronald S. Remmel
Journal of the Arkansas Academy of Science
Isolated mammalian spinal cord has been shown capable of generating locomotor activity. Propriospinal systems assumed to coordinate fore- and hindlimb activity are poorly understood. This study characterizes the long descending propriospinal (LDP) neurons in terms of the location of the somas and their peripheral inputs by direct neuronal recording. Anatomical studies using axonal retrograde transport of horseradish peroxidase from the lumbar to the cervical spinal cord as a tracer first described these neurons. Two hundred and thirty-one LDP neurons were identified in electrophysiological experiments. Of these, 123 responded to natural stimulation, and about 50% of the others were activated only …
Connections Of The Mesencephalic Locomotor Region (Mlr) In The Cat, E. Garcia-Rill, Robert D. Skinner, S. A. Gilmore
Connections Of The Mesencephalic Locomotor Region (Mlr) In The Cat, E. Garcia-Rill, Robert D. Skinner, S. A. Gilmore
Journal of the Arkansas Academy of Science
The cat entopeduncular nucleus (EN), which is the main output of the basal ganglia, is known to project to the mesencephalic tegmentum. We have been able to elicit antidromic responses in single EN neurons from the region of the mesencephalic locomotor region (MLR), then transect (precollicular-postmamillary) the brainstem and elicit rhythmic movements of the limbs by stimulation of the same site in the same animal. Injections of the fluorescent dye 2,4 diamidino phenylindole 2 HCL (DAPI) into this area induces retrograde labeling of cell bodies in EN and motor cortex. Injections of a tritiated amino acid (leucine) into the motor …