Study of motor units of M. pectineus of the dog (Canis familiaris).
Cross sections of M. pectineus of 6 adult dogs were used to study the number of motor units. Our results revealed that M. pectineus possesses 29,451 muscle fibres and 165 large nerve fibres. Since 60% of these latter fibres are motor fibres, the number of fibres per motor unit of M. pectineus is 294. This fact suggests that this muscle executes finely adjusted movements.
D000818:Animals; D004285:Dogs; D005260:Female; D008297:Male; D009046:Motor Neurons; D009132:Muscles / Q000033:anatomy & histology / Q000294:innervation*; D009412:Nerve Fibers; D013848:Thigh