down the axon

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  • Once the signal begins to travel down the axon, the membrane potential has already passed threshold, which means that it cannot be stopped.
  • The active neurons are those that send an action potential down the axon in any given time window, and the inactive ones are those that do not.
  • Since an axon can be unmyelinated or myelinated, the action potential has two methods to travel down the axon.
  • It is important to contrast this with the all-or-none law propagation of the action potential down the axon of the neuron.
  • These essential mechanisms include the delay in depolarization that action potential undergoes while traveling down the axon.
  • This initiates an action potential that then propagates down the axon.
  • This undershoot phase ensures that the action potential propagates down the axon and not back up it.
  • The level of neurofilament gene expression seems to directly control axonal diameter, which in turn controls how fast electrical signals travel down the axon.
  • Each time the electrical potential inside the soma reaches a certain threshold, a pulse is transmitted down the axon.
  • Action potentials initiated in the axon normally travel down the axon away from the soma.
  • This occurrence increases leakage of an action potential current down the axon, so it is weakest at the peripheral end.
  • After an action potential travels down the axon of a neuron, the resting membrane potential of the axon must be restored before another action potential can travel the axon.
  • By contrast, in unmyelinated axons, the action potential provokes another in the membrane immediately adjacent, and moves continuously down the axon like a wave.
  • If the sum of the stimuli reaches a certain voltage, known as the threshold potential, depolarization will continue from the axon hillock down the axon.
  • Adequate depolarization can lead to an action potential, which travels down the axon in a self-propagating manner as more ion channels open due to stimulation by the influx of positive ions.
  • Pribram posits that the length of the delay of an input signal in the dendritic arbor before it travels down the axon is related to mental awareness.
  • In normal neuromuscular function, a nerve impulse is carried down the axon (the long projection of a nerve cell) from the spinal cord.
  • An action potential spreads down the axon because of the gating properties of voltage-gated sodium channels and voltage-gated potassium channels.
  • The action potential propagates the electrical activity along the membrane of the dendrite to the cell body and then afferently down the axon to the terminal buttons where is crosses the synapse.
  • This all-or-nothing phenomenon originates at the axon hillock, resulting in a depolarization of the intracellular environment which propagates down the axon.
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