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Questions tagged [movement]

Pertains anything concerning the act of moving, motion and locomotion as well as the change of place or posture.

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25 views

What causes bio electricity? [closed]

When it is said that “electrical impulses sent from the brain” how is this charge flow produced?
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0answers
26 views

Difference in timescale of tissue movement vs cellular differentiation

I would like to better understand the difference in the timescales that cells seem to function. For example, how is it that muscle cells can move within seconds or less under stimuli such as hormones ...
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1answer
103 views

How many muscles work for a smile and how many when you are sad? [closed]

Muscles works in both cases but it’s seems difficult to understand that how they work
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1answer
39 views

Abrupt movements of birds and reptiles vs. smooth movements of mammals

How can it be explained (in evolutionary and/or neuronal terms), that the spontaneous movements of birds and reptiles are seemingly "abrupt" and not so "smooth": Their spontaneous movements seem to ...
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0answers
10 views

Is there computer software which can aid in the analysis and design of gait?

I am getting into robotics, and I would like to know if there is software apps for Windows or Linux which I could use to study and design creature gait. It would seem more efficient and practical to ...
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1answer
79 views

If the human atlanto-axial joint is pivotal only, what accounts for the craniums additional degrees of freedom?

The atlanto-axial joint is supposedly a pivot joint. I assumed it would be considered a ball-and-socket joint, based on a) the physical shape of the dens, and b) the degrees of motion of the cranium ...
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0answers
33 views

Name of sudden chicken movements in the neck and head, and their biology and reason of existence

I would like to know what the name of the jerks caused by chickens (and lizards) moving the head (in the case of chickens), or the entire body (in the case of lizards), is, when these move in bursts. ...
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2answers
123 views

If hands are folded with both index fingers parallel, they will come closer and touch eventually?

I have a question out of curiosity. It is just something I found out/discovered: if I fold my hands into each and let my two index fingers (see picture) be in parallel then they will eventually come ...
2
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1answer
73 views

brain and fingers movement theorie

I heard somewhere that when we want to do a repetitive movement of one finger (ex the index) . Our brain (in a very crude way) sends a first message to move all the fingers, and then a second message ...
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1answer
39 views

genetic difference subpopulations vs movement rate

Someone told me that if a geneticist finds no significant difference between 2 subpopulations that have temporal spatial overlap it might be that they are still almost closed (no connection). Is this ...
3
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1answer
2k views

Difference between Trophic and Tactic movements

What is the difference between Trophic (eg. Chemotrophic) and Tactic (eg. Chemotactic) movements? In Bryophytes, Anthrezoids are attracted towards Archegonia. This is Chemotactic movement. In ...
4
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1answer
633 views

Animals with substantial five-fold symmetry besides starfish? Any land animals?

Animals with four, six and eight legs are widespread while the concept of seven legs (fictitious Heptapods) are the makings of amazing scifi short stories and blockbuster movies. Are starfish the ...
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0answers
32 views

Are nastic responses growth responses?

I know they are non directional movement responses, but like tropic responses, does their movement involve growth?
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48 views

What are some good examples of phonotaxis in plants and other inanimate beings?

Reaction to the sound waves by plants is commonly unobserved. A physical movement or chemical release examples due to phonotaxis would be good to know about.
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0answers
583 views

Does the humeroradial joint move medially/laterally?

The humeroradial joint is a ball-and-socket joint that, if unrestricted, would allow for movement around all possible axes. However (as succinctly stated from Wikipedia): the annular ligament, by ...
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0answers
53 views

Hand motor control of the brain [closed]

I was watching a documentary (don't remember the name or the URL to the documentary) but they stated that the brain is layered and that each new layer is placed on top of the last. So the most ...
4
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1answer
989 views

Are glands in human made up of muscles?

I came across this idea while reading an excerpt of my textbook $-$ Muscles move eye lid , tongue, beat the heart, popel food through gut, discharge wastes, squeeze out secretion from the glands ...
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2answers
824 views

What is nastic movement due to growth?

I have read in my biology book that "nastic movement is the movement that occur due to difference in the rate of growth on two opposite sides of a plant organ" , but I can't visualize how this ...
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0answers
59 views

How much Cardiomyocyte Move in Relation to its Neurons?

I am trying to estimate how much cardiomyocyte and its things (mitochondria) move in relation to neurons Movement of neurons (1) Movement of cardiomyocytes Movement of cardiomyocytes' mitochondrias (...
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1answer
8k views

How does a Plasmodium move?

Plasmodium sp. does not have any locomotory organs. So, how does it move? What biochemical process allows it to move?
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1answer
5k views

How does an amoeba move?

Simple question. It forms a pseudopod, and then flows in to it. But how does it move its material to form a pseudopod? And even so, if it is floating in water, what is it pushing against so that part ...
5
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1answer
574 views

Does the anatomy of our hand result in (computer) mouse-accuracy that varies by direction of movement?

First off, I apologize if this isn't the right stackexchange sub-site for asking thsi question. I was torn as to where I should post this question: it could plausibly belong in Biology, User ...
59
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4answers
8k views

Why do smaller mammals move intermittently?

I was watching a nice little video on youtube but couldn't help but notice how snappy smaller animals such as rats and chipmunks move. By snappy I mean how the animal moves in almost discrete states ...
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1answer
84 views

How pronounced is the difference if we would change the running direction for runners?

I was jogging when I asked myself this question: In running contests the standard running direction is counterclockwise; I also believe to remember that the regulation is very old (right back to the ...
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1answer
132 views

Hand-eye coordination in 3D space

A simple daily event has amazed me and triggered this question. I have read and heard about hand-eye coordination. It quite straightforward when you e.g. want to open a door or play Xbox. In this case ...
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0answers
51 views

How much does sleeping correlate with daily activity?

I'm a very lazy person. I spend most of my time in a chair, at a computer; I eat more than three meals a day. I don't do any sport, at all. What I want to know is: why do I need to sleep 8-12 hours ...
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0answers
83 views

How do you accurately measure anguiliform (eel) locomotion?

In one of my courses, we were discussing a paper by Muller and van Leeuwen (2006) which made a lot of comparisons the differences between carangiform (mullet) and anguilliform (eel) locomotion. While ...
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1answer
44 views

Mechanisms of Flagella

I know that dynein arms and microtubules are involved in the contraction of certain parts of the flagella to produce a wave motion, but I don't understand they are related to the 9+2 structure of the ...
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2answers
23k views

How long does a signal from the brain take to reach the limbs?

If the brain sends a signal to move what's the time it takes the signal to travel via neurons to motor neurons in hands, arms and legs? How fast do those signals travel?
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1answer
4k views

Difference between flexion and contraction?

i asked this to my anatomy teacher and he said there is no difference but when it comes to specialy in body building when you say to flex their bicep they freeze their upper limb in order to do that ...
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2answers
674 views

What animal's lower eye lid moves to upper one when closing eyes?

I know cock's lower eye lids moves to meet the upper one when it closes its eye. What other animals does this? BTW, "cock-eyed" can mean upside down, I think.
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2answers
7k views

What is the evidence that australopithecines were bipedal?

Before the discovery of Australopithecus afarensis in the 1970s, most anthropologists believed that an increase in brain capacity had preceded bipedal locomotion. However, this reconstruction of the ...