Center Seeking
Center Seeking - Related Videos
08:39
Operant Sensation Seeking in the Mouse
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Cited by 27 •
2010
In this protocol we describe a method of operant learning using sensory stimuli as a reinforcer in the mouse. It requires no prior training or food restriction, and it allows the study of motivated behavior without the use of a pharmacological or natural reinforcer such as food.
10:35
A Procedure to Study the Effect of Prolonged Food Restriction on Heroin Seeking in Abstinent Rats
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Cited by 11 •
2013
A procedure that allows a demonstration of robust augmentation of drug seeking in food-restricted rats is described. Following heroin self-administration training, rats go through an abstinence period, in a drug-free environment, during which they are mildly food restricted. Drug seeking is then tested in the drug-associated environment.
08:54
A Procedure for Studying the Footshock-Induced Reinstatement of Cocaine Seeking in Laboratory Rats
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Cited by 14 •
2011
Animal models of relapse, known as reinstatement procedures, have been used extensively to study the role of stress in relapse to drug seeking. Here, we report on a method for inducing the reinstatement of cocaine seeking in laboratory rats via acute exposures to mild, intermittent electric footshock.
06:57
A Simple Way to Measure Alterations in Reward-seeking Behavior Using Drosophila melanogaster
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Cited by 11 •
2016
We describe a protocol for inducing rewarding and nonrewarding experiences in fruit flies (Drosophila melanogaster) using voluntary ethanol consumption as a measure for changes in reward states.
02:47
Optogenetic Induction of Long-Term Depression for Suppressing Narcotic-Seeking Behavior in Rats
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2025
Source: Rich, M. T., et al. Using Optogenetics to Reverse Neuroplasticity and Inhibit Cocaine Seeking in Rats. J. Vis. Exp. (2021)This video demonstrates the use of optogenetics to induce long-term depression (LTD) at medial geniculate nucleus to lateral amygdala (MGN-LA) synapses, weakening cue-induced narcotic-seeking behavior in a rat model. The rat, surgically implanted with optical fibers and virally transduced to express light-sensitive ion channels, undergoes optogenetic stimulation with...
FAQs
The inward acceleration continuously changes the direction of an object’s velocity, so the object follows a curved or circular path. This distinction matters because acceleration does not only describe changes in speed; it also describes changes in velocity direction. Analyzing the direction of the net force therefore helps explain how an object turns while moving through a rotating or curved system.
The required inward force does not represent a separate type of force. Gravity can guide an orbit, tension can pull an attached object toward a center, friction can help a vehicle follow a curve, and a normal force can redirect motion through contact. Identifying the actual source is essential for connecting the motion model to the physical system being studied.
The required force follows F = mv²/r, so increasing mass increases the force proportionally, while increasing speed has a stronger effect because speed is squared. Increasing the radius reduces the required force when mass and speed remain unchanged. These relationships allow physicists to predict how changing an object’s motion or path affects the force needed to maintain it.
First identify the fixed center and determine the direction of the net force or acceleration. Next establish the object’s mass, speed, and path radius, then apply F = mv²/r to find the required force or an unknown quantity. Finally, determine whether gravity, tension, friction, or a normal force provides that inward contribution in the specific system.
Centrifuges rely on inward-directed force and acceleration to describe motion around a rotating center, while vehicles require an appropriate inward force to move through curves. In both cases, the relationship among speed, radius, and force helps explain how changing operating conditions affects motion. The same framework supports practical analysis of rotating equipment and curved travel.
In planetary orbits, gravity can provide the inward force associated with curved motion, making center-seeking analysis a foundation for orbital dynamics. The framework also connects force, speed, and radius, which helps physicists examine whether a rotating or orbiting system maintains its intended motion. These relationships contribute to broader investigations of stability in gravitational and rotating systems.