An intracellular analysis of the entopeduncular inputs on the centrum medianum-parafascicular nuclear complex in cats.
Intracellular recording from the CM-PF neurons was performed by stimulation of the EN, the caudate nucleus (Cd), the cerebellar nuclei (CN) and the motor cortex in the cat under Nembutal anesthesia. Twenty-seven neurons in the CM-PF nuclear complex and two neurons near the habenular nucleus received monosynaptic inhibitory postsynaptic potentials (IPSPs; latency of 1.0-4.0 ms, mean 2.3 ms) by EN stimulation. Cd stimulation evoked excitatory postsynaptic potentials (EPSPs) followed by long hyperpolarizations in most of the CM-PF neurons and produced antidromic activation in 7 neurons. Six neurons received EPSPs (latencies of 4-7 ms) by cortical stimulation. CN stimulation affected only two neurons in the present study. Intracellular HRP staining revealed that some CM-PF neurons have polygonal or spindle-shaped somata with fine, long and sparsely spinous dendrites.
D000818:Animals; D002415:Cats; D002529:Cerebellar Nuclei / Q000166:cytology / Q000502:physiology; D004558:Electric Stimulation; D005071:Evoked Potentials; D006735:Horseradish Peroxidase; D009044:Motor Cortex / Q000166:cytology* / Q000502:physiology; D009433:Neural Inhibition; D009434:Neural Pathways / Q000502:physiology; D009474:Neurons / Q000502:physiology*; D011930:Reaction Time; D013787:Thalamic Nuclei / Q000166:cytology* / Q000502:physiology
D006735:Horseradish Peroxidase