which of the following is true regarding nuclear bag fibres of motorunit ?
Two types of intrafusal fibres -- nuclear bag fibre * primary (la) afferent -- supplies annulospiral ending in the centre -- provide information on muscle length and velocity (phasic response) fast stretch reflex -- nuclear chain fibre * primary (la) and secondary (II) afferent -- supplies flower spray ending -- monitor the length of the muscle (tonic response) --slow stretch reflex ref : guyton and hall
All India exam
responds to length only
responds to both length and velocity changes
responds to contraction of muscle fibres
responds to reflex relaxation
responds to both length and velocity changes