Questions tagged [autonomic-nervous-system]
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Are white rami communicantes only specific to the sympathetic system or are they found in parasympathetic system too?
According to the doctor that explained autonomic nervous system to me in medical school, white rami is found in both sympathetic and parasympathetic, it connects spinal nerves to sympathetic chain ...
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Confusion regarding the location of myelinated and unmyelinated nerve fibres
So, what I understand by neural system terms is
Central nervous system [CNS]- consist of brain and spinal cord
Peripheral nervous system [PNS] - consist of cranial and spinal nerves (all the nerves ...
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What is the difference between a dermatome and a sensory neurone?
I read that a dermatome is an area of skin supplied by a single spinal nerve but that this is sensory information? Why do spinal nerves supply the skin? I thought it was the other way round- sensory ...
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Parasympathetic effects on digestive tract - motility versus absorption
The parasympathetic nervous system's purpose is often referred to as "rest and digest." As part of this purpose, parasympathetic innervation increases motility in the digestive tract to move ...
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Frequency modulation of parasympathicus and sympathicus
According to my literature, the sympathetic nervous system accelerates heart rate and modulates < 0.1 Hz, whereas the parasympathetic nervous system decelerates heart rate and is modulated 0.04 - 0....
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Does endocrine noradrenaline stimulate sympathetically innervated cells?
Cells that are innervated by the sympathetic nervous system, does endocrine noradrenaline target the same receptors on them? Are they dually activated by both nervous and endocrine noradrenaline?
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Are "sympathetic nerves" the same as "cardiopulmonary splanchnic" nerves?
I've gathered from a number of sources (e.g., Patel (2015), Wikipedia, and here) that the sympathetic nerves leaving the sympathetic trunk to innervate the heart and lungs are called "...
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What does it mean to say that the sympathetic nervous system is organized for diffuse activity?
"Sympathetic activities generally serve to mobilize the energy stores of the body, to increase the blood flow through certain regions (e.g., the heart) at the expense of other areas (e.g., the ...
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What does sympathetic and parasympathetic 'tone' mean?
My professor's lecture notes say that " The basal rate of firing is called “sympathetic tone” and 'parasympathetic tone" , but a table I found on the internet says that the parasympthetic system has ...
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Can catecholamines degrade back into tyrosine, or, is synthesis irreversible? (in human body)
Catecholamines like dopamine, noradrenaline and adrenaline are broken down with enzymes that catalyze the reaction. Can they degrade back into tyrosine (a conditionally essential amino acid), or is ...
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Can stress and arousal be independent?
I'm trying to figure out if it's possible to have a stress response without being initially, or simultaneously aroused. I'm defining stress to be physiological stress (ie. release of cortisol) and ...
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What are these two nerves running parallel to the spine called?
I was looking for a human body nervous system, and often times i found a picture like the one below, where there are two nerves running parallel to the spinal column. I searched for it, but nothing ...
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When we laugh or run for sport which autonomic system works?
When we laugh or run for sport which autonomic system takes place in this time?
While I am not sure what happens in heart while laughing (tachycardia or bradycardia), but for sport running I'm sure ...
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Voluntary actions of Autonomic Nervous System
Somatic motor activity is always voluntary, while ANS motor activity is usually involuntary. pgno:762
This indicates the possibility of voluntary activity by ANS.
So, what are the voluntary actions ...
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Where are interneurons in Autonomic Nervous System?
According to the following, it implies that preganglionic neurons are interneurons.
Interneuron called preganglionic neuron whose cell body is situated in the "intermediolateral" column of spinal ...
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Pee Shiver: Any reliable research about this phenomenon?
I came across 2 webpages about the science of pee shiver.
Link 1
Link 2
I wonder if there any reliable scientific research about this phenomenon. The 2 webpages I have hyperlinked attribute this to ...
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Why should we preceed neostigmine by atropine in tubocurarine toxicity?
Why should we precede neostigmine by atropine in tubocurarine toxicity ?
I know that neostigmine act as anticholinesterase thus increasing the number of Ach molecules rendering them able to displace ...
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What drives max heart rate on beta blockers?
In a healthy human being, the increase in heart rate from rest to around 100 to 110 beats per minute at low intensity exercise is due to withdrawal of the parasympathetic nervous system's influence. ...
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To what extent is excretory control a learned vs. instinctive behavior?
Human babies are clearly not born knowing whether/how to hold in urine and feces, and teaching them to do so requires a nontrivial (really nontrivial...) amount of work on the parents' part. But once ...
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what is meta-sympathetic nervous system?
I always knew about the sympathetic and para-sympathetic nervous systems, and today I was told about the meta-sympathetic nervous system, but I didn't understand well the man who told me about it and ...
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Why do typical acetylcholinesterase inhibitors (like carbamates) have a greater parasympathetic effect than a sympathetic effect?
I understand that the post-ganglionic neurones of the sympathetic system are adrenergic, but surely these neurones will be excited to the same extent as the parasympathetic post-ganglionic neurones (...
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Are the sympathetic and parasympathetic nervous systems exact opposites?
Suppose mechanism existed that could block function of the PNS. Would this just mean then the sympathetic nervous system would become overly active?
Do the sympathetic and parasympathetic systems ...
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What neuro-motor diseases cause the lower esophageal sphincter (LES) to malfunction?
Please note: This question is neither homework nor seeking medical advice. I'm simply asking for a factual, objective, biological explanation of the various neuro-motor diseases/illnesses that can act ...
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Is the autonomic nervous system only activated by internal stimuli?
My professor claims that the autonomic nervous system is only activated by stimuli from organs but I really feel like I've read that it can be activated by outside stimuli, although I'm not sure what ...
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Why is there only adrenoreceptors and no active adrenergic innervation in bronchus and uterus?
Our bronchus and uterus has beta adrenoreceptors, but they have no active sympathetic nervous system innervation in these organs. Was there a sympathetic innervation in trachea and uterus, earlier, ...
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Why does anxiety cause diarrhea or constipation?
Anxiety sometimes cause diarrhea, sometimes constipation, and sometimes both. It's interesting because it seems their underlying neurophysiology is somehow different. What are underlying physiological ...
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Differentiation of norepinephrine and epinephrine in indications
Norepinephrine is less beta2 adrenomimetic than epinephrine so more selective so less bronchospasm so may be therofore better in treatment of cardiac failure and different shocks.
However, I am not ...
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Salbutamol's Pathways of Interaction and Classification
Salbutamol is a very commonly used direct-acting β2-agonist.
This suggests me that it is sympatholytic.
However, it has sympathomimetic pathways, see PubChem for Sympathomimetic.
I am trying to ...
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What is the cause of dry cough?
I first thought this question in the case of
the cause of dry throat after 3-day recovery of dry cough?
but then I realised that the cause of dry cough can be a general thing.
Assume the person ...
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Can Serous inflammation on pleura pulmonalis cause dry cough and runny nouse?
I am interested in the mechanism between the dry cough and runny nose (serous inflammation) here.
I started to think how Acute respiratory viral infection is causing the dry cough.
The serous ...
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Parallel Autonomic regulation of Cough and Runny Nose
I describe here the serous inflammation of runny nose.
Cough is mediated by Cough center.
I think Runny nose is also controlled by the autonomic nervous system and probably by some reflex.
Assume ...
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What is the nature of action potentials in autonomic nervous system?
My conjecture is that the natures of sympathetic and parasympathetic action potentials are different.
My findings propose me that
sympathetic action potential is little longer lasting than ...
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