Reflexes Flashcards
What is a monosymaptic reflex?
One that involves X1 synapse
What is a polysynaptic reflex?
One that involves multiple synapses
What are the key features of a reflex?
- must have the same response each time
- must be involuntary and not under conscious control
- must require a stimulus to elicit the reflex
What is another name for normal muscle fibres?
Extrafusal muscle fibres
Where are proprioreceptors located?
In the muscles, joint capsules, tendons and ligaments
What type of muscle fibres carry somatic motor?
A alpha
What is the difference between the muscle spindle sensory receptors and the Golgi tendon sensory receptors?
Golgi tendon organs = in series with muscle fibres = tells you about muscle tension
Muscle spindles = in parallel with extrafusal muscle fibres = tells toy about muscle fibre length
What is the term given to a sensory receptor which is always giving info to the CNS?
Tonically active
Which proprioceptor is tonically active?
Muscle spindles
What is the individual motor neurons of the muscle spindles which tell them when to contract?
Gamma motor neurons
Wis the muscle spindles reflex mono or polysynaptic?
Mono
Is the Golgi tendon reflex mono or polysynaptic
Poly
What neuron do polysynaptic reflexes involve?
Inter neurons
What is the name of the process in a reflex whereby one muscle is excited and the opposing muscle is inhibited?
Reciprocal inhibition
What is the name of the process within a reflex where the opposite limb is affected by the reflex and is effected with the reverse effect?
E.g. one leg retracts, the other contracts for stability?
Cross cord reflexes
