Search results
Results from the WOW.Com Content Network
As an action potential (nerve impulse) travels down an axon there is a change in electric polarity across the membrane of the axon. In response to a signal from another neuron, sodium- (Na +) and potassium- (K +)–gated ion channels open and close as the membrane reaches its threshold potential.
A feedback model of the motivation-volition process. Lower labels are terminology of Zimmerman. [1] [2]In psychological theories of motivation, the Rubicon model, more completely the Rubicon model of action phases, makes a distinction between motivational and volitional processes.
In neuroscience, an excitatory postsynaptic potential (EPSP) is a postsynaptic potential that makes the postsynaptic neuron more likely to fire an action potential. This temporary depolarization of postsynaptic membrane potential , caused by the flow of positively charged ions into the postsynaptic cell, is a result of opening ligand-gated ion ...
In electrophysiology, the threshold potential is the critical level to which a membrane potential must be depolarized to initiate an action potential. In neuroscience , threshold potentials are necessary to regulate and propagate signaling in both the central nervous system (CNS) and the peripheral nervous system (PNS).
Graded potentials that make the membrane potential less negative or more positive, thus making the postsynaptic cell more likely to have an action potential, are called excitatory postsynaptic potentials (EPSPs). [4] Depolarizing local potentials sum together, and if the voltage reaches the threshold potential, an action potential occurs in ...
When an ion channel opens and there is a net gain of positively charged ions, like sodium (Na +) and calcium (Ca 2+), that flow into the cell, this creates excitatory postsynaptic potentials (EPSP) that depolarize the cell membrane increasing the likelihood of an action potential by bringing the neuron's potential closer to its firing threshold ...
Psychology is the scientific study of mind and behavior. [1] [2] Its subject matter includes the behavior of humans and nonhumans, both conscious and unconscious phenomena, and mental processes such as thoughts, feelings, and motives. Psychology is an academic discipline of immense scope, crossing the boundaries between the natural and social ...
Priming is a concept in psychology and psycholinguistics to describe how exposure to one stimulus may influence a response to a subsequent stimulus, without conscious guidance or intention. [ 1 ] [ 2 ] [ 3 ] The priming effect is the positive or negative effect of a rapidly presented stimulus (priming stimulus) on the processing of a second ...