nerve impulse
Electrical axon message
A nerve impulse is an electrical signal traveling along a nerve fiber.
When a neuron is stimulated, a wave of chemical and electrical changes propagates down its length, transmitting information from one part of the body to another.
The nerve impulse travels from the brain to the muscles in milliseconds.
Also called action potential.
Neuron's rapid electrical discharge
- depolarizationLoss of electrical gradient
- repolarizationMembrane voltage reset
- propagationAct of spreading widely
- voltage-gatedResponsive to electrical gradients
threshold · hyperpolarization · electrical signal · saltatory conduction · refractory period · excitatory · inhibitory · stimulus
Neuron's signal-sending projection
- synapseNerve signal crossing point
- dendriteNeuron's input branch
- myelin sheathLipid layer around axons
- neurotransmitterSynaptic chemical messenger
vesicle · node of Ranvier · interneuron · afferent · efferent · receptor · ganglion
Brain's extension through vertebrae
- knee-jerkInstinctive and unconsidered
- patellarOf the kneecap
- withdrawalAct of taking away
- blinkRapid lid movement
startle · automatic · involuntary · reflex arc · reaction time · protective · sneeze · cough
Fibers tensing and shortening
- movementChange in position
- voluntaryDone by choice
- coordinationOrganized cooperative movement
- acetylcholineNeurotransmitter for muscles and memory
locomotion · motor cortex · skeletal muscle · smooth muscle · tremor · paralysis · muscle twitch · motor control
action potential
Neuron's rapid electrical discharge
- depolarizationLoss of electrical gradient
- repolarizationMembrane voltage reset
- propagationAct of spreading widely
voltage-gated · threshold · hyperpolarization · electrical signal · saltatory conduction · refractory period · excitatory · inhibitory · stimulus · excitation
axon
Neuron's signal-sending projection
- synapseNerve signal crossing point
- dendriteNeuron's input branch
- myelin sheathLipid layer around axons
neurotransmitter · vesicle · node of Ranvier · interneuron · afferent · efferent · receptor · ganglion
spinal cord
Brain's extension through vertebrae
- knee-jerkInstinctive and unconsidered
- patellarOf the kneecap
- withdrawalAct of taking away
blink · startle · automatic · involuntary · reflex arc · reaction time · protective · sneeze · cough · gag reflex
muscle contraction
Fibers tensing and shortening
- movementChange in position
- voluntaryDone by choice
- coordinationOrganized cooperative movement
acetylcholine · locomotion · motor cortex · skeletal muscle · smooth muscle · tremor · paralysis · muscle twitch · motor control · muscle fiber
- nervous systembrain, nerves, spinal cord, axon, dendrite
- neuroscienceMRI, brain, synapses, dendrite, synapse
- physiologymetabolism, circulation, respiration, homeostasis, digestion
- Body Processesmetabolism, digestion, respiration, circulation, heartbeat
- body signalsheartbeat, pulse, brainwaves, brain waves, brainwave
- brain activitybrain waves, brainwave, brain signal, alpha waves, beta waves
nerve impulsethought
Mental concept or reflection
cognition · mental state · idea · perception · qualia
nerve, nervous, impulse, impulsive, nervousness, nervously, neurotic, nerved, unnerved