Reflexes Qs True/false 1-10

1. Spatial summation refers to simultaneous threshold stimulation of two or more nearby afferent nerves.

Ans: False. subthreshold stimulus.

2. The interval between the stimulus and the final effect is mainly determined by the length of the afferent and efferent nerves.

Ans: False: Reflex time is determined by synaptic delay. It is less in a monosynaptic delay

3. Synapses are the 1^st part of a reflex to become fatigued.

Ans: True.

4. Babinski response is an example of a flexor reflex

Ans: True. Seen in infants, also in deep sleep, coma, and in UMN lesion.

5. Gamma efferent activity only takes place in stretched muscle.

Ans: False. Also active in muscle at normal length and even in shortened muscle.

6.Muscle spindles are essentially tension monitors in muscle.

Ans: False. Length monitors.

7. Deep reflexes are multisynaptic reflexes

Ans: False. Monosynaptic.

8. Occlusion causes lesser reflex response on simultaneous stimulation of 2 nerves than sum total of responses obtained when each nerve is separately stimulated.

Ans: True.

9. After discharge is due to stimulation of motor neurons through multiple internuntial pathways.

Ans: True.

10.Sensitization intensifies the reflex response on repeated application of non injurious stimulus.

Ans: False. Injurious stimuli.