Blink Reflex Flashcards
1
Q
What is the R1 response?
A
Ipsilateral, representing disynaptic reflex pathway between main sensory nucleus of V in the mid-pons and the ipsilateral facial nucleus in the lower pontine tegmentum
2
Q
What is the R2 response?
A
Bilateral, multisynaptic pathway between the nucleus of the spinal tract of V in the ipsilateral pons and medulla and interneurons forming connections in the ipsilateral and contralateral facial nuclei
3
Q
What are typical R1 and R2 latencies?
A
10-12 ms; 30-40 ms
4
Q
What could elicit an R1 response bilaterally?
A
Glabellar tap
5
Q
What is the absolute R1 latency? Ipsilateral R2 latency? Contralateral R2 latency? What about the difference in these latencies?
A
Less than 13; less than 41; less than 44;
less than 1.2; less than 5; less than 7
