9 votes
Accepted

Is Maslow's hierarchy of needs really accurate at labeling sex as a physiological "need"?

This is a trickier multi-part question to adjudicate than you might think. Is Sex A "Need" (Physiological or Otherwise)? Definitions of "Needs", "Motives", etc., are dime-a-dozen. Though I don't ...
  • 286
8 votes
Accepted

Can you get sad by sniffing onions, just like you can get happy by forcing yourself to smile?

I assume you're referring to the experiment by Strack, Martin, and Stepper (1988) in which people rated a cartoon as funnier when they had to hold their face in a smile shape by gripping a pencil in ...
  • 361
5 votes
Accepted

What regulates the strength of motor signals?

Short answer Muscles are controlled by motor neurons in the spinal cord. The number of motor neurons that fire, as well as their individual firing rates govern the control of muscle force. Background ...
  • 19.9k
4 votes
Accepted

What is the mechanism behind unihemispheric sleep in animals?

In general, I don't think the answers to these questions are known. This paper is a good review of unihemispheric slow-wave sleep (USWS); the section on neurophysiological mechanisms is largely ...
  • 2,913
4 votes
Accepted

Do animals that sleep during the day have a different sleep architecture than those who sleep at night?

One study (Zhao et. al., 2010), investigating the sleep architecture of two bat species (one nocturnal, and one mixed), notes the following: C. sphinx was found to sleep predominantly throughout ...
  • 1,517
4 votes

Which personality traits are proved to correlate with any facial features?

Reading people's faces to determine their character is called physiognomy. Some might downplay the idea that it is real but scientists are nowadays starting to accept that there may be a ...
  • 11.3k
3 votes
Accepted

Do bodily manifestations (e.g. jerking) and intense euphoric sensations (e.g. "heat", "electricity") always co-occur in spiritual experiences?

An inherent problem with the line of investigation is that the exhibited behaviours are inconsistent with the claimed emotions. In no other situation do the emotions of love, peace, ecstasy and ...
  • 1,688
3 votes
Accepted

How is the term "physiological measurement" defined?

Physiology is a very broad term that includes neuroscience: Physiology is the scientific study of the functions and mechanisms which work within a living system. Within the cognitive sciences, ...
  • 18.3k
3 votes

Does anybody know a source having multi-electrode (several channels) recorded data of multiple Neurons (I prefer real data not artificial)?

https://crcns.org has several openly available datasets with recordings from many different brain areas. Each recording will likely have multiple simultaneously recorded neurons.
  • 1,855
3 votes

Why pale when we fear and red when we are angry

The 5F response (fright/flight/fight/freeze/fawn response) to threats is responsible for both situations. Specifically, among other reactions, the 5F response causes the following: [emphasis mine] ...
  • 11.3k
3 votes

Physiologically speaking is anxiety and adrenaline the same?

Not quite the same, although there is some overlap. What's colloquially known as an "adrenaline rush" (e.g. what you'd experience in a roller coaster or more generally in a fight-or-flight ...
  • 9,935
3 votes
Accepted

What is it about the nature of slow-wave sleep that makes it difficult to awaken the sleeper?

Slow EEG waves reflect a slow oscillation in cortical neurons, between a depolarized state (UP-State) and hyper polarized state (DOWN-state; Steriade et al., 1993a, 1993b). During the down-state, ...
3 votes
Accepted

Does the heart play a role in the occurrence of emotions?

As it has been pointed in the other answers and the comments, the heart is indeed only an organ that pumps blood and all the processes responsible for emotions are carried out by the brain. However, ...
3 votes

Why is it easier to fall asleep in the dark?

It's probably more accurate to say that it's more difficult to fall asleep in the light because the circadian rhythm is directly regulated by ambient light. Our retinas contain a small amount of cells ...
2 votes
Accepted

How similar are human brains within the same haplogroup?

The following comes from my research experience using fMRI to study the human visual system. Overall, peoples brains are similar to each other on higher scales, and become very different from each ...
  • 1,517
2 votes

What causes muscle stiffness contraction and tension during stress

Presumably you to mean to ask what pathway mediates muscle tension. muscle tension is controlled by the reticular formation (in the brain stem), so it doesn't require anything special to happen in the ...
  • 9,935
2 votes

Why does the tempo tend to get faster?

Tempo should be an objective parameter in music. The same piece is heard differently at higher tempo than in lower tempo. This is sensible if you accept an Aristotelian perspective of music, whereby ...
2 votes

Is Maslow's hierarchy of needs really accurate at labeling sex as a physiological "need"?

Based on all the energy spent on courting and mating, both in the human and animal world, I would say yes. There is also the argument that "survival" of humans as a species depends on sex (...
2 votes

How does emotional stress cause skeletal muscle rigidity?

Short answer The stress response included norepinephrine release, in turn increasing blood pressure. This may cause muscle tension. Background What an interesting question. To my surprise, I couldn'...
  • 19.9k
2 votes

Can you get sad by sniffing onions, just like you can get happy by forcing yourself to smile?

Short answer No Background Onions produce the irritant syn-propanethial-S-oxide. It stimulates the eyes' lachrymal glands and thereby stimulate the release tears (source: Library of Congress). The ...
  • 19.9k
2 votes

Would non-neural physiological insights be considered to be in the field of neuroscience?

There is increasing scientific evidence to incorporate other organ systems when considering the whole function of the nervous system. Neuroendocrinology, neurogastroenterology, and neuroimmunology are ...
1 vote
Accepted

Are reaction time and memory physiological measure or behavioral observation?

It may help considering whether the phenomenon is under some control by the participant. Pupil dilation is a physiological measure, but the speed at which I hit a key (reaction time) is a behavioral ...
1 vote
Accepted

Can signals from the prefrontal cortex alone trigger a readiness potential in the pre-supplementary motor area?

The original author is not making a claim one way or another for logical AND or logical OR within this context. The statement the pre-supplementary motor area (preSMA), which in turn receives ...
  • 6,387
1 vote

What's the difference between the neuroendocrine system vs endocrine system?

Neuroendocrine systems can be defined as the sets of neurons, glands and non-endocrine tissues, and the neurochemicals, hormones, and humoral signals they produce and receive, that function in an ...
  • 11.3k
1 vote

Is a more specific breathing technique better than just slow, deep breathing for calming oneself?

Any anxiety — and especially with Panic Attacks — can often but not always lead to Hyperventilation. Steady, slow breathing will prevent it, whilst also helping to relieve the anxiety. Whilst ...
  • 11.3k
1 vote

What keeps the cerebrospinal fluid circulating? Is it pumped by something?

When from what I've viewed first hand through my formal study working with NANOG, SOX2, & OCT4 Trinity Factor mediation of a Non Canonical Wnt pathway in lineage regression morphology of simple ...
1 vote

Why do people laugh in serious situations?

When it comes to serious situations, one may react with feeling the events as surreal. One may have trouble believing that what is happening is actually real. What happens next is that one may be ...
  • 3,749
1 vote

Does anxiety produce adrenaline or does adrenaline make the person anxious?

I don't think a causal relationship between the two has been established yet. I did read about an experiment conducted by Ulrich Bolm Androff, where the blood samples 10 physicians and psychologists ...
1 vote

Is there a correlation between facial features and personality?

Here are some recent papers about the links between face and behavior: Kramer, R. S. S., King, J. E. & Ward, R. Identifying personality from the static, nonexpressive face in humans and ...

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