Anatomy, Physiology and Neuroscience

A guy told me recently that he thinks he remembers reading somewhere that either excessive masturbation or just regular masturbation (and we're talking about men here) can negatively impact your testosterone levels and not in a temporary way. Any truth to this?

I must go to toilet before bedtime, or i may dream of dirty & disgusting toilets or of looking for toilets that make me uncomfortable in my sleep .... Every time i dream of going to toilet i really need to after wake up. Is it a kind of protection our brain orders us not to wet the bed ? Therefore whatever we dream is a hint we shouldn't do it in our dream ? in other words, it is a way how our brain functions in a proper way ? Do you have the same experience ?

I need someone to clarify slightly the anatomical locations of these terms cuneate tubercle, gracile tubercle, cuneate fasciculus, gracile fasciculus. At the anterior of the spinal cord, will you find the cuneate tubercle a little up the the spinal cord and laterally and then a separate anatomical locaton more medial to that cuneate tubercle you will find what is called the gracile tubercle? Then a little below the gracile tubercle though still anterior you will find the cuneate fasciculus more medially and the gracile fasciculus more laterally to the cuneate fasciculus? Does cuneate fasciculus and gracile fasciculus extend all the way up to the pyramids on the s…

As a disclaimer, I want to make it very clear that I am NOT talking about souls or spirits. I have been watching Michio Kaku on curiosity stream, and I take interest in some of his theories on consciousness. But it seems like there is an important detail that he is missing, along with every body talking about this that I could find, and it's starting to become a little bit disturbing. This was originally meant for Michio Kaku, but apparently he is impossible to contact unless you are with an organization. So basically I ended up coming here to see if anybody knows where I can find some literature on this subject, or maybe some insight on where I may be mistaken or maybe w…

I use an anatomy software called Brain Pro from 3d4medical and it has some flaws because it uses older 2D technology for images and highlights anatomical areas by pins. Can someone clarify for me the difference between the posterior commissure and the tectum of the midbrain? thanks

Hello everybody I'm new to this website but my teacher recommended it to me. My theory for this question is that our brain perceives it as real information so when we die e.g. fall of a cliff and hit the water the body goes into shock which causes awakening. Another idea is that this has something to do with adrenaline in the body. Hope someone can weigh in on this topic. Thank you.

Is it legit to say that physiology is studying the "mechanisms" that provide the body with Vitality?

Had a guess bout my Tinnitus, and ran a little experiment, which seems to have lessened it and changed character a bit. I was thinking that the little hairs in my ear, that get brittle as you age, might be "stuck" in the on position, or that somehow, the fact that the high pitch sensing capability that the hairs were supposed to give me, resulted in a constant high pitch sound, because of their non responsiveness to sound. Sort of like "hearing" silence. Anyway, I don't know if I actually have reduced the Tinnitus by the experiment, or whether it is just wishful thinking. What I did, was guess that if the hairs were not working because they were old and bri…

I have been thinking about prosthetic limbs. Can anyone tell me if my idea could possibly work? First, have we mapped out nerves and what each one controls? Second, can we simulate muscles with other materials? So, I am a nerd and love Marvel and recently I was re-watching the second Captain america. I was looking at Bucky's metal arm and wondering if something similar could be done with modern science. I researched different materials looking for light yet very strong metals and materials that could be used as artificial muscles and nerves. This is what I was thinking about: The bones are made of titanium/tungsten alloy, the skin is made of graphene, the nerves are made …

I'm reposting this Men's Health video link because I believe it provides invaluable insight as to why procrastination could be detrimental to our health. Procrastination, which is likely something we do or have done, results in the release of stress hormones which triggers the production of white blood cells that could become resistant to the cortisone keeping those cells in check, according to the video. It goes on to describe how unchecked white blood cells could damage otherwise healthy organs. In retrospect, I think this video is more about the effects of stress rather than procrastination because I do not believe procrastinators experience the associated level of …

Of the 5 traditional senses, 2 are the result of chemical stimulus (smell and taste) and 3 result from frequency-based stimulus. 2 of the latter 3 result from kinetic stimulus (touch and hearing) and one is the result from electromagnetic radiation in a certain range of frequencies (vision). Right away, we can add another sense and say that perception of temperature is its own sense, as it results from radiation in the 'infrared' range of frequencies in the electromagnetic spectrum - which is distinct from the kinetic stimulus resulting in 'touch'. Presumably, sensory neurons can exist for any frequency in the electromagnetic spectrum. It is more unlikely for ther…

This Men's Health video provides very convincing physiological evidence as to why we should be more responsive to the immediacy of responsibilities. Enjoy!

Hello there science folks! Pardon if this is indeed the wrong forum, but it seemed fitting. I'm not sure how relevant this is compared to usual sciency discussions, but I am am a humble creative writer in search of answers for a video game project that I'm dabbling in. While it is fiction, I love trying to base it on something that is at least realistic in theory. What I'm wondering is, is there a certain center in the brain that governs aggressive and or violent behavior, or something along those lines? In the sense that a creature could adapt or develop in such a way that it was more prone to aggressive or considerably violent behavior, without necessarily …

"I mean" and "you know" are popular verbal tics. Are they tied to the heart and respiration rate ?

Hello, I am finding it hard to understand the connection between ribs and vertebraes. My question is about which rib with which vertebrae are connected (for example: first rib is connected with the 7th cervical vertebrae?) Thank you!

I have read that reduing mean pressure in distal arteries (e.g: lower limb) maintains blood flow there. How can this be true if flow=pressure/resistance, and resistance is highest in the arterioles?

Hello, From reading about smooth muscle relaxation, I understood that MLCP enzyme (myosin light chain phosphatase) dephosphorylates the myosin. This leads to relaxation because dephosphorylated myosin is unable to bind actin in smooth muscle cells. However, some smooth muscle cells have 'latch state' where myosin heads remain attached to the actin even after dephosphorylation. I don't really understand what causes the difference between the two cases. In one, dephos. causes relaxation while in the other it causes prolong binding. Anyone knows the explanation?

http://www.telegraph.co.uk/news/science/science-news/12112051/First-head-transplant-successfully-carried-out-on-monkey-claims-surgeon.html Just saw this in the news - the first head transplant successfully carried out on a monkey. Brain was kept alive at -15 degrees c. "The plan for the first human head transplant is on schedule, towards its expected date of realisation, Christmas 2017".

I have seen a lot of face and nose anatomy but I still cannot find the proper name for this area of the face between the eye and nose. Here is a picture I hope this helps. Thanks in advance!

I do not understand how can somebody be born a girl but not want to be this gender. Don't you develop estrogen in your body when your forming into a girl and it forms the brain and how it thinks. There is very few differences in the male and female brains " Many neuroscientists had already concluded that brains are checkered with a mix of male- and femalelike structures, said Jordan-Young" , the study says only 6 percent of the brain is distinctively male or female. but even with little differences in the brains there are very much differences with the hormones that are released you are still born with certain hormones in your body that relate to characteristics of a male…

Hi everyone I was once again wondering something about an extracellular potassium increase. Of course, at the very moment of the injection, it's quite obvious that the influenced cells (or their membrane potential) are being hyperpolarized - they are, to say, relatively getting more negatively charged in comparison to their surrounding. However, great Goldman teaches us that after a new equilibrium has been reached, the cells will, compared to the initial situation without the potassium increase, be depolarized. My question is thus: how is this equilibrium exactly reached and how so is the resting membrane potential more positive, compared relatively to the i…

Hello everyone Soon I'll be taking exam on the CNS. In preparation for this exam, there are multiple example questions, which were frequently asked on previous editions of the exams. They are reconstructed by fellow students of older years, who already took the exam. One of these questions is: Testing the gustatory sense is useful in patients presenting with: Dysarthria Diplopia Loss of hearing Hemifacial paralysis I think 3 of these answers could be correct: Dysarthria because speaking involves several cranial nerves, of which Nn. VII, IX, X and XII. Of these, VII, IX and X are important for gustatory sense (VII anterior 2/3 tongue; IX posterior 1/3 tongue;…

Who’s up for a brief discussion of the sleep process? Although I’ve studied dreams and dreaming for more than three decades and have blogged and published on the nature and evolution of the dreaming brain, I consider myself merely well informed rather than expert on the topic. However, based on the most recent and available peer-reviewed research, I will be making some definitive statements about the nature of sleep and dreaming that you may find compelling, if not informative. First, let’s explore why we sleep and dispel some misconceptions about why we dream and remain immobile while dreaming. Definitively, sleep and dreaming primarily serves the metabolic dema…

Hey guys... LOL... what should we all be doing regarding this matter? I keep getting mixed messages depending who I'm talking too! Hope I can get some insight from www.scienceforums.net elite group to shed some light on the matter! Thanks, Clara Tanone

Hi how are you? I am new to the forum. My question is whether someone with only one functional eye can still have an accommodative reflex? Presumably the brain needs depth perception to tell whether an object is moving from far to near - so without stereoscopic vision provided by two eyes, can monocular vision still accommodate? I'm thinking yes because depth perception is not completely lost with monocular vision - it's just not as precise as if one had two eyes. But then this raises the question of whether accommodative reflex is partially impaired when someone closes one eye? Thank you!