Biomaterial Database

[Types of skeletal muscle motor unit activity during cold tremor]. 1979

Iu V Lupandin, and N K Poleshchuk

The impulse activity of 184 single motor units of the sartorius muscle was investigated in anesthetized cats during cold tremor. Motor units whose impulse activity was connected with respiration cycles and motor units functioning independently of respiration were detected. The functions of both types of the motor units are characterized by the same average rate (4-12 imp/s) and low variability of interspike intervals. Additional thermal stimulation of the vascular thermoreceptors and changes in the rate and amplitude of respiratory excursions caused similar responses of the motor units of both types. It is suggested that motor units of both types have the same thresholds and belong to the phasic slow motor units.

UI	MeSH Term	Description	Entries
D009132	Muscles	Contractile tissue that produces movement in animals.	Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D012119	Respiration	The act of breathing with the LUNGS, consisting of INHALATION, or the taking into the lungs of the ambient air, and of EXHALATION, or the expelling of the modified air which contains more CARBON DIOXIDE than the air taken in (Blakiston's Gould Medical Dictionary, 4th ed.). This does not include tissue respiration (	Breathing
D002415	Cats	The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)	Felis catus,Felis domesticus,Domestic Cats,Felis domestica,Felis sylvestris catus,Cat,Cat, Domestic,Cats, Domestic,Domestic Cat
D004576	Electromyography	Recording of the changes in electric potential of muscle by means of surface or needle electrodes.	Electromyogram,Surface Electromyography,Electromyograms,Electromyographies,Electromyographies, Surface,Electromyography, Surface,Surface Electromyographies
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012768	Shivering	Involuntary contraction or twitching of the muscles. It is a physiologic method of heat production in man and other mammals.	Shiverings