Brainstem-mediated Locomotion and Myoclonic Jerks. I. Neural Substrates
Authors
Affiliations
Eleven of 40 decerebrated cats were found to exhibit periods of spontaneous or sensory myoclonus and locomotion beginning 24 h after decerebration. Histological analysis showed that the cats generating myoclonus hemorrhagic lesions in the retrorubral nucleus (RRN) and ventral mesopontine junction (vMPJ). However, with intact RRN and vMPJ never showed myoclonus. To verify that the lesions were responsible for myoclonus, 6 additional cats received N-methyl-D-aspartate (NMDA, 0.5 M/0.5 microliter) injections in the areas of RRN and vMPJ to produce bilateral lesions. Coordinated rhythmic leg movement (locomotion) or myoclonic twitches developed in all of these cats beginning 3 hours after NMDA injection. These NMDA lesion-induced movements appeared either spontaneously (5 out of 6 cats) or after sensory stimulation (1 cat). Four cats received saline control injections in the RRN and vMPJ and did not have spontaneous, or sensory stimulation-induced, myoclonic twitches during the 48 h observation period. These results indicate that the RRN and vMPJ have a suppressive effect on myoclonic twitches and rhythmic leg movement. Dysfunction of these regions could release motor activity into sleep and waking states.
Decoding Wilson disease: a machine learning approach to predict neurological symptoms.
Yang Y, Wang G, Fang S, Li X, Ding Y, Song Y Front Neurol. 2024; 15:1418474.
PMID: 38966086 PMC: 11223572. DOI: 10.3389/fneur.2024.1418474.
Ventral medullary control of rapid eye movement sleep and atonia.
Chen M, Vetrivelan R, Guo C, Chang C, Fuller P, Lu J Exp Neurol. 2017; 290:53-62.
PMID: 28077261 PMC: 5844261. DOI: 10.1016/j.expneurol.2017.01.002.
The anatomical, cellular and synaptic basis of motor atonia during rapid eye movement sleep.
Arrigoni E, Chen M, Fuller P J Physiol. 2016; 594(19):5391-414.
PMID: 27060683 PMC: 5043043. DOI: 10.1113/JP271324.
Long L, Xu L, Xiao Z, Hu S, Luo R, Wang H Sci Rep. 2016; 6:23444.
PMID: 27001010 PMC: 4802311. DOI: 10.1038/srep23444.
New pathways and data on rapid eye movement sleep behaviour disorder in a rat model.
Hsieh K, Nguyen D, Siegel J, Lai Y Sleep Med. 2012; 14(8):719-28.
PMID: 23058690 PMC: 3546264. DOI: 10.1016/j.sleep.2012.08.008.