Questions tagged [neurology]

The branch of medicine or biology that deals with the anatomy, functions, and organic disorders of nerves and the nervous system.

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Why does a UMN lesion cause hyper-reflexia?

I can see from my reading that "A lesion in an Upper Motor Neuron (UMN) causes Hyper-reflexia (with regards to the Golgi Tendon Reflex)". I have read various resources but none of them give ...
A.B.S's user avatar
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T1 weighting vs T2 weighting for monitoring a brainstem lession

https://www.researchgate.net/figure/1-Typical-values-of-relaxation-parameters-T1-and-T2-ms-for-Hydrogen-components-of_tbl1_291346848 I see from the table (various tables actually from diverse papers ...
George Ntoulos's user avatar
5 votes
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Do opioids lower pain thresholds across the board?

I was told by someone who should know (as they must manage post-operative pain) that opioids lower a person's pain threshold, period. I had never heard that before, and I was doubtful that the ...
anongoodnurse's user avatar
2 votes
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Model of nerve viii firing

I'm trying to understand how sound is converted into neural spikes through the auditory system. I've understand that the sound causes the basilar membrane to vibrate in turn causes hair cells to ...
George guo's user avatar
1 vote
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What is the difference between the vasomotor center and cardiovascular center in the brain?

The vasomotor center is introduced as the following in our coursework: The vasomotor center is located bilaterally in the reticular substance of the medulla and lower third of pons. It contains the ...
Filthyscrub's user avatar
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is glue embolization the last frontier in Intracranial aneurysms research?

I very very recently started researching the field of intracranial aneurysms (ICA) and I have this question about that glue or gel that some people talk about. To me, who I am just learning the basic ...
Alex Kps Bdc's user avatar
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1 answer
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A condition that causes an enjoyable sensation in the brain when drinking cold beverages

Whenever I drink something very cold and direct the flow towards the roof of my mouth close to the brain, I do not get any uncomfortable sensation like many do, on the contrary, I find it highly ...
3m3sd1's user avatar
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Is there a name for the bright lights/fuzzy spots that are seen after head trauma?

I have had a number of concussions and the one thing I remember quite a few times is seeing bright spots or white fuzzy spots in my vision briefly after. A similar thing occurs when I have ...
Curious Layman's user avatar
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Size of somatosensory overlap/intermediate zone for pain/light touch

For somatosensory innervation, there is a substantial overlap within the spinal cord and dermatomes, so that the (maximal) innervation zones of adjacent spinal roots form overlapping/intermediate ...
Martin's user avatar
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Why do neurostimulators for DBS need to be implanted?

Neurostimulators for deep brain stimulation (DBS) are called implantable pulse generators (IPG), precisely because all of them end up being implanted inside the patient's body. Now I get that the ...
David Cian's user avatar
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1 answer
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Meaning of "lower limit of normal + 20% over basal value" in a description of a blood lactate analysis (after glucose load)

From "Alpers- and MNGIE-like disease with disturbed CSF folate transport and an unusual mode of genetic transmission of POLG mutations: a case report": Basal serum lactate was normal (1.1–1....
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Can diabetic nerve damage occur even if the blood sugar is under control? [closed]

Having blood sugar levels elevated at some point of time ago but now kept under control for long, can still cause problems associated with elevated sugar levels? For instance, diabetic neuropathy?
Harshit Rajput's user avatar
-1 votes
1 answer
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What's the name of the function that helps localise part of body without looking?

What function in the brain allows it to locate body parts in space without looking? How is it possible to eat without looking? Why are some people able to catch food that has been thrown at them? Are ...
Hicham Bouchilkhi's user avatar
1 vote
1 answer
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Why nephrotic syndrome does not present with haematuria?

As we know that nephrotic syndrome is characteristically present with proteinuria and on the other hand haematuria is seen in nephritic syndrome. Defect/loss of podocytes in nephrotic syndrome leads ...
drishti rewri's user avatar
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Which psychiatric disorders currently have objective, neuroimaging-based diagnostic methods? [closed]

For which psychiatric conditions is it possible currently to view someone's brain through neuro-imaging to conclude that a brain condition is present?
Julius Hamilton's user avatar
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1 answer
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Are the surgical site infections "in the brain" caused by same bacteria found in "other parts of the body"?

Are the surgical site infections "in the brain" caused by same bacteria found in "other parts of the body"? There's a blood-brain barrier so, most of the bacteria that infect ...
Pretty_Girl's user avatar
2 votes
1 answer
149 views

Would a SARS-CoV-2 infection disrupt the blood-brain barrier, leaving the brain more vulnerable to drugs taken simultaneously with the infection?

According to some studies[1], there is some evidence that the virus could cross the BBB. Is that is the case, does that mean that it would weaken the barrier allowing potentially neurotoxic drugs to ...
DPM's user avatar
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Why don't people replace morphine with Beta-Endorphines?

I was reading about the morphine molecule. It binds to our opioid receptors. These opioid receptors have endogenous binding partners also, like β-Endorphin. There have been reports that these ...
Aditya Shrivastava's user avatar
4 votes
2 answers
123 views

What are ASDH and AS in the context of "cause of death"?

I'm not sure this is technically the correct place to ask this question, but I know I need medical expertise so hear I am. I have been researching my family genealogy recently and, of special interest ...
Curious Layman's user avatar
2 votes
1 answer
66 views

The effect of dietary protein on neurodegeneration

I have recently come across the following two studies: The first paper was performed on an Alzheimer's disease mouse model, and found that protein restriction cycles reduce IGF-1 and phosphorylated ...
Saucy Goat's user avatar
1 vote
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Detrimental effects of very-wide or multiple monitors?

Over the past several decades, computer monitors have typically gotten larger, and more specifically wider. Also, it has become (somewhat) more common for people to use an multiple monitors next to ...
einpoklum's user avatar
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Meaning of "early neurotoxicity" in description of methotrexate treatment effects - at an early age? or an early-stage neurotoxicity?

From a guideline: Due to the inhibitory effect of methotrexate on DHPR and the interaction with dihydrofolate reductase (DHFR), this treatment may lead to HPA and early neurotoxicity, possibly ...
CowperKettle's user avatar
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what is the visual feedback in parkinson's disease?

the patient cannot walk normally, but can only walk if there are black and white squares on the floor. How can we explain this visual feedback physiologically? basically what is visual feedback? What ...
medical student's user avatar
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What is the meaning of "subcortical retraction" in a description of MRI of a Kearns-Sayre syndrome patient?

I came across the term subcortical retraction and cannot understand its meaning. Does it mean "the withering of the subcortical areas" (shrinking of subcortical white matter)? From Follow-up ...
CowperKettle's user avatar
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2 votes
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A neurologist or a psychiatrist or a psychologist, who is better suited to diagnose neurodevelopmental disorders?

There are a lot of neurodevelopmental conditions which are hidden-type and resembles mental conditions. These includes sensory processing disorders, prosopagnosia, developmental coordination disorder (...
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1 vote
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30 views

Light adaption of pupil. When is a size adaption normal? [closed]

If an eye gets lighted with a flashlight or other light sources the pupils will decrease their width. This pupillary response is a typical indicator in diagnostics. Is there any specific value which ...
Mike1535's user avatar
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1 answer
3k views

Myasthenia Gravis and preserved deep tendon reflexes, why?

I saw a patient on rounds the other day w/ MG (Myasthenia Gravis) and it was mentioned that DTR (deep tendon reflexes) are preserved. I've been going over it in my head and I am confused why they ...
user20654's user avatar
4 votes
1 answer
73 views

Why is multiple sclerosis associated with trigeminal neuralgia?

Multiple sclerosis (MS) is classically described as: an immune-mediated inflammatory disease that attacks myelinated axons in the central nervous system (Luzzio, n.d.). Since MS only involves the ...
D.Tan's user avatar
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Would neurons regenerate even in adults? [closed]

I want to know whether or not the nerves regenerate in human adults. My Question Please give me evidences for this issue. What experiments and logic do they use to prove that the nerves are/are not ...
user14257473's user avatar
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Can dermatomal problems possibly indicate other medical conditions?

I have been reading up about dermatomes and it got me wondering if dermatomal issues can indicate potential problems further into the body than the dermis? For a couple of examples, can say one of T1 ...
Chris Rogers's user avatar
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Why does Delayed Post-hypoxic Leukoencephalopathy (DPHL) have a biphasic clinical course?

Delayed Post-hypoxic Leukoencephalopathy (DPHL or Grinker myelinopathy) is a rare condition where patients recovering from an anoxic/hypoxic brain injury develops new neurological symptoms 2-4 weeks ...
D.Tan's user avatar
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1 vote
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Is the MSC-based regenerative medicine promising for Ischemic stroke stroke patients? ; two points difference in the 47-point test

Many papers says, regenerative medicine using MSCs are promising for Ischemic stroke stroke patients. But in my layman's sense, various data don't seem promising. So, I want to hear the opinions of ...
Blue Various's user avatar
4 votes
1 answer
336 views

Does a unilateral total obstruction of the carotid artery cause brain damage?

The brain receives oxygenated blood from both the internal carotid arteries and the vertebral arteries, which are connected through the Willis circle (Circulus arteriosus cerebri). Obstruction of ...
Narusan's user avatar
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0 votes
1 answer
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Does hydroxychloroquine make tardive dyskinesia worse?

I found this article which suggests to me that chloroquine (hydroxychloroquine?) can make tardive dyskinesia worse. Is my reading of it accurate?
Matt Samuel's user avatar
1 vote
0 answers
17 views

Can neuromuscular electrical stimulation be used as a low-cost alternative to mechanical breathing

It is speculated that because of COVID-19 pandemic there may be shortage of intensive care equipment (mechanical breathers) causing deaths. Though IDK what is so costly in these mechanical breathers ...
KOLANICH's user avatar
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114 views

Tilt table test and beta blockers

Is tilt table test indicative with beta blockers for dysautonomia diagnosis? Or is it require drug withdrawal?
red0ct's user avatar
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3 votes
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145 views

What, if any, are reasonable further tests for evaluation of cryptogenic stroke?

What is considered a "complete" workup of cryptogenic stroke? If someone presents with symptoms consistent with stroke and receives: PE EKG and external monitoring, MRI with contrast/MRA of head and ...
anongoodnurse's user avatar
1 vote
1 answer
22 views

Neuronal ceroid lipofuscinosis treatments [closed]

Could Batten’s disease be cured by supplementing a drug which promotes lipolysis, since it is caused by an accumulation of lipids in brain?
Vyshakh 's user avatar
1 vote
0 answers
55 views

How does high-intensity aerobic exercise affect the brain?

I have been reading articles claiming that serotonin, endorphins and BDNF are produced during exercise, but they never mention the intensity or duration of exercise for this to happen. To not make ...
Avatrin's user avatar
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1 vote
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How does low-intensity aerobic exercise affect the brain?

I have been reading articles claiming that serotonin, endorphins and BDNF are produced during exercise, but they never mention the intensity or duration of exercise for this to happen. To not make ...
Avatrin's user avatar
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2 votes
0 answers
48 views

Why does the brain shrink and increase energy usage after dehydration?

Along with mood and energy deficits a dehydrated brain has to use a lot more energy to accomplish the same tasks, shows a study from King's College London. Quote from Dehydration affects brain ...
Bob Ortiz's user avatar
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2 votes
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101 views

Are transorbital lobotomies still considered ethical these days?

Psychosurgery has a controversial history and despite modifications still raises serious questions about benefit, risks, and the adequacy with which consent is obtained. Its continued use is defended ...
Bob Ortiz's user avatar
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1 vote
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Peripheral excitability effects of Mirtazapin

Is there any reason/mechanism according to which only two dosages (on two consecutive days) of Mirtazapin 30mg might lead a patient to feel an increase in their peripheral neurological sensitivity, ...
z8080's user avatar
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1 answer
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What’s the role of hypothalamus in headache pathophysiology? [closed]

The hypothalamus forms part of the central autonomic network, regulating body homeostasis and controlling pain. What is its role in headaches?
Iron Dangoni's user avatar
2 votes
1 answer
93 views

Tips on identifying CVA patients

In my work, not once i encounter old people with deterioration and i am having hard time deciding if does symptoms may be related to CVA or not and if a neurologist should be called. I will explain ...
Alon's user avatar
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1 vote
1 answer
2k views

What things can trigger scintillating scotomas? Are they sometimes classified benign and not a reflection of a condition requiring further treatment?

This is a different question than Are scintillating scotomas really caused by cortical spreading depression? If so, how is this known to be true? asked almost one year ago in Psychology and Neurology ...
user avatar
1 vote
1 answer
30 views

Has tardive dyskinesia ever "gotten better?" [closed]

I have tardive dyskinesia and my doctor said when he diagnosed me that it "might" not go away. I've heard that it's "potentially permanent." Has there ever been a recorded case where the condition has ...
Matt Samuel's user avatar
3 votes
0 answers
132 views

Foods/drugs/vitamins to avoid, or not avoid, for tardive dyskinesia

I'm half expecting this to be closed as off-topic as seeking personal medical advice, but I'm going to try not to phrase it that way and see how it flies. For full disclosure, I was recently diagnosed ...
Matt Samuel's user avatar
1 vote
0 answers
20 views

Why do some neurons live longer than others?

It seems that the scientific community agrees that the development of new neurons stops between adolescence and early adulthood. ("Does the Adult Brain Really Grow New Neurons?" https://www....
Daniel Rodríguez's user avatar
2 votes
0 answers
40 views

Can the human brain be taught to recognize new body parts, and how?

A newly emerging category of medical study is the potential to replace a missing piece, in part or in its entirety. While currently in its infancy, the potential for this in human health is astounding....
TheEnvironmentalist's user avatar