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Spectral analysis of the electromyogram of the temporal muscle in the rhesus monkey (Macaca mulatta)


, : Spectral analysis of the electromyogram of the temporal muscle in the rhesus monkey (Macaca mulatta). Electroencephalography and Clinical Neurophysiology 44(3): 317-327

Spontaneous EMG activity of one mandibular elevator and postural muscle, the anterior temporalis, was recorded from 20 unanesthetized rhesus monkeys subjected to 4 experimental protocols. The EMG activity was analyzed with a spectral analyzer to determine changes in particular frequency bandwidths after (1) administering a dissociative drug, (2) placing weights on the mandible, (3) detaching the muscle, and (4) adaptation of the muscle to oral respiration. The mean distribution of frequency components indicated that ketamine--HCl increased the power of all frequencies below 400 c/sec, particularly those at 20--40 c/sec. A period of hyperactivity and increased recruitment and discharge of motor units occurred within the first 30 min following administration of the drug. Passive and sustained lowering of the jaw with increased weights indicated that increasing the front incisor distance 2--4 cm significantly decreased the frequency components below 400 c/sec accompanying a decrease in active motor units. Comparison of frequency components of the temporalis EMG before and within 40 days after detachment suggested some subtle variations in the mean distributions predominantly around 200 c/sec but without significant changes. Comparison of the mean spectral distribution between 8 nasal-breathing and 8 oral-breathing monkeys indicated a significant loss of power in the normal dominant frequency range of 20--100 c/sec in the oral respiratory group except for enhancement of the 20 c/sec bandwidth. The results suggest that the anterior temporalis alters its EMG activity during both short (i.e., min, h) and long-term (i.e., months, year) adaptations of the muscle.

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Accession: 038981049

PMID: 76538

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Sikovec, S., 1978: Biological turbidity of bottled wine. Sodobno kmetijstvo: 11 (5) 228-230

Villalta Jose F. de; Crusafont M., 1957: Dos nuevas especies de Hipparion del pikermiense espanol. Describes Hipparion periafricanum n.sp. and H. gromovae n.sp. from Pikermian (Pliocene) deposits of the Teruel area, Spain.

Harper, R.A.; Jackson, D.C., 1965: Progressive systemic sclerosis. Fifty-two cases of scleroderma have been investigated in the Diagnostic Radiology Department. The incidence of the various systemic manifestations has been discussed. It has been found that over 50% of the patients had positive radiological change...

Frendeus, Bjorn; Wachtler, Caroline; Hedlund, Maria; Fischer, Hans; Samuelsson, Patrik; Svensson, Majlis; Svanborg, Catharina, 2001: Escherichia coli P fimbriae utilize the Toll-like receptor 4 pathway for cell activation. Fimbriae mediate bacterial attachment to host cells and provide a mechanism for tissue attack. They activate a host response by delivery of microbial products such as lipopolysaccharide (LPS) or through direct fimbriae-dependent signalling mechani...

Halling A.; Forsberg J G., 1990: Steroid synthesis in ovarian homogenates from immature mice treated with diethylstilbestrol in neonatal life. Female mice of the NMRI strain were treated with the synthetic oestrogen diethylstilboestrol (DES) for the first 5 days after birth. Pools of ovaries were removed from groups of 6-, 12-, 21-, 28- and 56-day-old females. An homogenate of an ovarian...

Novel, E., 1952: Des mefaits ignores du plancton. Schweizerische Zeitschrift fuer Hydrologie, 14(2): 366-370