8
votes
Accepted
How are reflexes suppressed?
Short answer
The pain withdrawal reflex can only be suppressed when touching something painful on purpose. Deliberate, conscious contraction of the extensor muscle before reflex initiation can prevent ...
- 52.3k
8
votes
Accepted
Do spinal cord reflexes (such as the knee-jerk reflex) continue to function under general anaesthesia?
The issue is complicated. In general it depends on the specific spinal reflex and on the specific anaesthetic. But it seems that the modern general anaesthetics usually do NOT block monosynaptic ...
- 301
6
votes
Do spinal cord reflexes (such as the knee-jerk reflex) continue to function under general anaesthesia?
From an animal-experimentation perspective, the absence of functional reflex arches are often used to assess adequate anesthetic depth. For example, in rodents a toe-pinch is often used to assess ...
- 52.3k
4
votes
Do spinal cord reflexes (such as the knee-jerk reflex) continue to function under general anaesthesia?
I am not a surgeon.
However, I might have some insight:
General anesthesia often (most of the time ?) include curare derivated drugs (such as pancuronium) that will effectively block any muscular ...
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4
votes
Can low temperatures induce a withdrawal reflex?
The withdrawal reflex is a nociceptive flexor reflex and is a spinal reflex intended to protect the body from damaging stimuli.
In other words, activation of heat receptors is not the trigger of the ...
- 52.3k
2
votes
Accepted
How fast is the patellar reflex?
Mamizuka et al. (2007) calculated acceleration data of the patellar reflex.
Their study measured the reflex generated in response to the tapping force applied to the patellar tendon with a ...
- 29.7k
2
votes
Accepted
Which part of the reflex arc takes the longest time?
I am providing this answer considering myotatic reflex arc (as you have specified in the question).
There are so many factors on which it depends...I have listed as many as I could -
Here the sensory ...
- 513
2
votes
Which part of the reflex arc takes the longest time?
The answer to this question depends which reflex arc was activated, without knowing the exact reflex arc one should assume the answer as multifactorial and relate to this (or similar) table:
(Source: ...
- 5,710
2
votes
Why does looking at bright light trigger sneezing in some people?
In high school biology, we had to read a book called "Survival of the Sickest". In this book, the idea is presented that this reflex evolved during humankind's "caveman" days. The author presented the ...
- 71
2
votes
Accepted
Why do some reflex actions involve interneurons, but some don't?
The "knee jerk" reflex is a stretch reflex, as @John's answer indicates. It is unfortunately named the "knee jerk" for the response observed in the corner case where rapid, short extension of the leg ...
- 8,751
2
votes
Why do some reflex actions involve interneurons, but some don't?
I did not realize it but the knee jerk reflex is a stretch reflex and thus only involves two neurons (monosynaptic). Many many more reflexes use 3 or more neurons (polysynaptic) so include ...
- 14.3k
2
votes
Accepted
Renorenal Reflex
How is renorenal reflex a negative feedback loop?
You are confusing two different negative feedback loops.
1) There is a negative feedback loop in which efferent renal sympathetic nerve activity ...
- 647
2
votes
Accepted
Are there neuron mediated reactions faster than reflexes?
A reflex as fast as the blink in a neural circuit:
I would consider suppression of outer hair cells in the cochlea to be a reflex; the faster component of this reflex is about the same as the blink ...
- 44k
2
votes
What is the duration between: the moment we stop breathing and to body's and involuntary mucle movement?
Your respiratory system has quite a number of neural and non-neural (e.g., physical, emotional, and chemical factors) controls in addition to the ability to be voluntary controlled.
A strong ...
- 29.7k
1
vote
What is the mechanism behind the F-Wave?
This is a great question, and I've had trouble finding any authoritative study; since F-waves are mostly used as a diagnostic tool it doesn't seem like they've been studied much at the mechanistic ...
- 44k
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