Muscle Spindle Flashcards
What is muscle spindle comprised of?
Intrafusal fibres and stretch receptors
What do stretch receptor monitor?
Muscle length
The 2 ends of the intrafusal fibres are innervated by?
Gamma motor neurons (LMN)
The two ends of the muscle spindle are …. whilst the central portion is….
Contractile
Non contractile
The middle third of the spindle is associated with?
Fast type 1a afferent sensory fibres
The inferior and superior thirds of the spindle are associated with?
Slower conducting type 2 afferent sensory fibres
The more or faster the muscle is stretched, the?
The more or faster the muscle is stretched - the greater the rate of receptor firing
What are the efferent neurons of the muscle spindle?
Gamma motor neurons (LMN), prevents intrafusal becoming slack at the ends
