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Yawns are "contagious" in that other people (and even dogs) often yawn in response to seeing someone else yawn. The reason people yawn is unclear, but it is thought to have evolved to serve a physiological need, but changed to serve mainly a social function in the animals that exhibit it. This is supported by the fact that yawns are not contagious to ...
5
Introduction
First of all, the study should not be trusted too much. Thirty six test subjects does not seem very much to me in order to make such a claim. However, &AtlLED's opinion in the comment differs from this.
From the abstract (emphasis mine):
Thirty-six infants were studied during diving exercises in infant swimming. [...] Although the ...
3
Reflexes
When it comes to physical reflexes, they are for the most part fixed.
The link provided involves exploring a knee-reaction due to hitting the patellar tendon...
"Okay, so I hit, and what happens is... her leg kicks forward. There’s a muscle contraction happening..."
This reflex is due to a sensory neuron connected to a motor neruon, but doesn't ...
2
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3502130/
Conclusion
The findings from this study support the view that the mechanism for the JM is a reduction in presynaptic inhibition of alpha motoneurons as it is influenced by physical and not mental activity.
2
During your rotations you will notice that not every disease will show itself with the classic "Textbook" presentation (this actually very rare). Moreover MG can be considered a cluster of different diseases: because of different groups of muscles affected by the disease (e.g. ocular or generalized) or because of pathogenesis (anti achR, anti MusK ...
1
What you are describing sounds like a startle response. The startle response, along with the vestibular-occular reflex and acoustic reflex, and are often thought of as reflexes, despite not involving a reflex arc where a sensory neuron synapses with the spinal cord allowing for motor responses to occur without the signal reaching the brain. The startle ...
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