2-Minute Neuroscience: Action Potential
  • View Times: 0
  • |
  • Release Date: 2024-05-13
Neuroscience Made Simpler
2-Minute Neuroscience: Zolpidem (Ambien)
2-Minute Neuroscience: Zolpidem (Ambien)
10-Minute Neuroscience: Depression
10-Minute Neuroscience: Depression
2-Minute Neuroscience: Sleepwalking
2-Minute Neuroscience: Sleepwalking
2-Minute Neuroscience: Vertigo
2-Minute Neuroscience: Vertigo
2-Minute Neuroscience: Migraine
2-Minute Neuroscience: Migraine
2-Minute Neuroscience: Methylphenidate
2-Minute Neuroscience: Methylphenidate
2-Minute Neuroscience: DMT
2-Minute Neuroscience: DMT
2-Minute Neuroscience: Cochlear Implants
2-Minute Neuroscience: Cochlear Implants
2-Minute Neuroscience: Frontotemporal Dementia
2-Minute Neuroscience: Frontotemporal Dementia
2-Minute Neuroscience: Spina Bifida
2-Minute Neuroscience: Spina Bifida
2-Minute Neuroscience: Sleep Paralysis
2-Minute Neuroscience: Sleep Paralysis
2-Minute Neuroscience: Fatal Insomnia
2-Minute Neuroscience: Fatal Insomnia
2-Minute Neuroscience: PTSD
2-Minute Neuroscience: PTSD
2-Minute Neuroscience: Schizophrenia
2-Minute Neuroscience: Schizophrenia
2-Minute Neuroscience: COVID-19 & the Brain
2-Minute Neuroscience: COVID-19 & the Brain
2-Minute Neuroscience: Obsessive-Compulsive Disorder
2-Minute Neuroscience: Obsessive-Compulsive Disorder
2-Minute Neuroscience: ADHD
2-Minute Neuroscience: ADHD
2-Minute Neuroscience: Restless Legs Syndrome
2-Minute Neuroscience: Restless Legs Syndrome
2-Minute Neuroscience: Autism
2-Minute Neuroscience: Autism
2-Minute Neuroscience: Narcolepsy
2-Minute Neuroscience: Narcolepsy
2-Minute Neuroscience: MDMA
2-Minute Neuroscience: MDMA
2-Minute Neuroscience: Brain Aneurysms
2-Minute Neuroscience: Brain Aneurysms
2-Minute Neuroscience: Bell's Palsy
2-Minute Neuroscience: Bell's Palsy
2-Minute Neuroscience: Tinnitus
2-Minute Neuroscience: Tinnitus
2-Minute Neuroscience: Ketamine
2-Minute Neuroscience: Ketamine
2-Minute Neuroscience: Chronic Traumatic Encephalopathy
2-Minute Neuroscience: Chronic Traumatic Encephalopathy
2-Minute Neuroscience: Motor Neurons
2-Minute Neuroscience: Motor Neurons
2-Minute Neuroscience: Phantom Limb
2-Minute Neuroscience: Phantom Limb
10-Minute Neuroscience: Visual Pathways
10-Minute Neuroscience: Visual Pathways
10-Minute Neuroscience: Action Potentials
10-Minute Neuroscience: Action Potentials
10-Minute Neuroscience: Synapses
10-Minute Neuroscience: Synapses
10-Minute Neuroscience: Neurons
10-Minute Neuroscience: Neurons
2-Minute Neuroscience: Tourette Syndrome
2-Minute Neuroscience: Tourette Syndrome
2-Minute Neuroscience: Withdrawal Reflex
2-Minute Neuroscience: Withdrawal Reflex
2-Minute Neuroscience: Serotonin-Norepinephrine Reuptake Inhibitors
2-Minute Neuroscience: Serotonin-Norepinephrine Reuptake Inhibitors
2-Minute Neuroscience: Cerebral Cortex
2-Minute Neuroscience: Cerebral Cortex
2-Minute Neuroscience: Deep Brain Stimulation
2-Minute Neuroscience: Deep Brain Stimulation
2-Minute Neuroscience: Meningitis
2-Minute Neuroscience: Meningitis
2-Minute Neuroscience: Wernicke-Korsakoff Syndrome
2-Minute Neuroscience: Wernicke-Korsakoff Syndrome
2-Minute Neuroscience: Corneal Reflex
2-Minute Neuroscience: Corneal Reflex
2-Minute Neuroscience: CBD
2-Minute Neuroscience: CBD
2-Minute Neuroscience: THC
2-Minute Neuroscience: THC
2-Minute Neuroscience: Alien Hand Syndrome
2-Minute Neuroscience: Alien Hand Syndrome
2-Minute Neuroscience: Melatonin
2-Minute Neuroscience: Melatonin
2-Minute Neuroscience: Psilocybin
2-Minute Neuroscience: Psilocybin
2-Minute Neuroscience: Agonism, Antagonism, & Allosteric Modulation
2-Minute Neuroscience: Agonism, Antagonism, & Allosteric Modulation
2-Minute Neuroscience: LSD
2-Minute Neuroscience: LSD
2-Minute Neuroscience: Beta-Endorphin
2-Minute Neuroscience: Beta-Endorphin
2-Minute Neuroscience: L-DOPA
2-Minute Neuroscience: L-DOPA
2-Minute Neuroscience: Parasympathetic Nervous System
2-Minute Neuroscience: Parasympathetic Nervous System
2-Minute Neuroscience: Sympathetic Nervous System
2-Minute Neuroscience: Sympathetic Nervous System
2-Minute Neuroscience: Indirect Pathway of the Basal Ganglia
2-Minute Neuroscience: Indirect Pathway of the Basal Ganglia
2-Minute Neuroscience: Direct Pathway of the Basal Ganglia
2-Minute Neuroscience: Direct Pathway of the Basal Ganglia
2-Minute Neuroscience: Functional Magnetic Resonance Imaging (fMRI)
2-Minute Neuroscience: Functional Magnetic Resonance Imaging (fMRI)
2-Minute Neuroscience: Norepinephrine
2-Minute Neuroscience: Norepinephrine
2-Minute Neuroscience: Sodium-Potassium Pump
2-Minute Neuroscience: Sodium-Potassium Pump
2-Minute Neuroscience: Electroencephalography (EEG)
2-Minute Neuroscience: Electroencephalography (EEG)
2-Minute Neuroscience: Trochlear Nerve (Cranial Nerve IV)
2-Minute Neuroscience: Trochlear Nerve (Cranial Nerve IV)
2-Minute Neuroscience: Oculomotor Nerve (Cranial Nerve III)
2-Minute Neuroscience: Oculomotor Nerve (Cranial Nerve III)
2-Minute Neuroscience: Touch Receptors
2-Minute Neuroscience: Touch Receptors
2-Minute Neuroscience: Hypoglossal Nerve (Cranial Nerve XII)
2-Minute Neuroscience: Hypoglossal Nerve (Cranial Nerve XII)
2-Minute Neuroscience: Accessory Nerve (Cranial Nerve XI)
2-Minute Neuroscience: Accessory Nerve (Cranial Nerve XI)
2-Minute Neuroscience: Prefrontal Cortex
2-Minute Neuroscience: Prefrontal Cortex
2-Minute Neuroscience: Vagus Nerve (Cranial Nerve X)
2-Minute Neuroscience: Vagus Nerve (Cranial Nerve X)
2-Minute Neuroscience: Phototransduction
2-Minute Neuroscience: Phototransduction
2-Minute Neuroscience: Glossopharyngeal Nerve (Cranial Nerve IX)
2-Minute Neuroscience: Glossopharyngeal Nerve (Cranial Nerve IX)
2-Minute Neuroscience: Methadone
2-Minute Neuroscience: Methadone
2-Minute Neuroscience: Vestibulocochlear Nerve (Cranial Nerve VIII)
2-Minute Neuroscience: Vestibulocochlear Nerve (Cranial Nerve VIII)
2-Minute Neuroscience: Nicotine
2-Minute Neuroscience: Nicotine
2-Minute Neuroscience: Facial Nerve (Cranial Nerve VII)
2-Minute Neuroscience: Facial Nerve (Cranial Nerve VII)
2-Minute Neuroscience: Abducens Nerve (Cranial Nerve VI)
2-Minute Neuroscience: Abducens Nerve (Cranial Nerve VI)
2-Minute Neuroscience: Concussions
2-Minute Neuroscience: Concussions
2-Minute Neuroscience: Trigeminal Nerve (Cranial Nerve V)
2-Minute Neuroscience: Trigeminal Nerve (Cranial Nerve V)
2-Minute Neuroscience: Opioids
2-Minute Neuroscience: Opioids
2-Minute Neuroscience: Optic Nerve (Cranial Nerve II)
2-Minute Neuroscience: Optic Nerve (Cranial Nerve II)
2-Minute Neuroscience: Olfactory Nerve (Cranial Nerve I)
2-Minute Neuroscience: Olfactory Nerve (Cranial Nerve I)
2-Minute Neuroscience: Brain Tumors
2-Minute Neuroscience: Brain Tumors
2-Minute Neuroscience: Glial Cells
2-Minute Neuroscience: Glial Cells
2-Minute Neuroscience: Stages of Sleep
2-Minute Neuroscience: Stages of Sleep
2-Minute Neuroscience: HPA Axis
2-Minute Neuroscience: HPA Axis
2-Minute Neuroscience: Huntington's Disease
2-Minute Neuroscience: Huntington's Disease
2-Minute Neuroscience: Amphetamine
2-Minute Neuroscience: Amphetamine
2-Minute Neuroscience: Corpus Callosum
2-Minute Neuroscience: Corpus Callosum
2-Minute Neuroscience: Pons
2-Minute Neuroscience: Pons
2-Minute Neuroscience: Parkinson's Disease
2-Minute Neuroscience: Parkinson's Disease
2-Minute Neuroscience: Hydrocephalus
2-Minute Neuroscience: Hydrocephalus
2-Minute Neuroscience: Dopamine
2-Minute Neuroscience: Dopamine
2-Minute Neuroscience: Stroke
2-Minute Neuroscience: Stroke
2-Minute Neuroscience: Glutamate
2-Minute Neuroscience: Glutamate
2-Minute Neuroscience: Blood Supply of the Brain
2-Minute Neuroscience: Blood Supply of the Brain
2-Minute Neuroscience: Neurotransmitter Release
2-Minute Neuroscience: Neurotransmitter Release
2-Minute Neuroscience: Serotonin
2-Minute Neuroscience: Serotonin
2-Minute Neuroscience: Oxytocin
2-Minute Neuroscience: Oxytocin
2-Minute Neuroscience: Long-Term Potentiation (LTP)
2-Minute Neuroscience: Long-Term Potentiation (LTP)
2-Minute Neuroscience: Wernicke's Area
2-Minute Neuroscience: Wernicke's Area
2-Minute Neuroscience: Broca's Area
2-Minute Neuroscience: Broca's Area
2-Minute Neuroscience: Acetylcholine
2-Minute Neuroscience: Acetylcholine
2-Minute Neuroscience: GABA
2-Minute Neuroscience: GABA
2-Minute Neuroscience: Taste
2-Minute Neuroscience: Taste
2-Minute Neuroscience: Alcohol
2-Minute Neuroscience: Alcohol
2-Minute Neuroscience: Olfaction
2-Minute Neuroscience: Olfaction
2-Minute Neuroscience: Selective Serotonin Reuptake Inhibitors (SSRIs)
2-Minute Neuroscience: Selective Serotonin Reuptake Inhibitors (SSRIs)
2-Minute Neuroscience: Midbrain
2-Minute Neuroscience: Midbrain
2-Minute Neuroscience: Periaqueductal Gray (PAG)
2-Minute Neuroscience: Periaqueductal Gray (PAG)
2-Minute Neuroscience: Benzodiazepines
2-Minute Neuroscience: Benzodiazepines
2-Minute Neuroscience: Caffeine
2-Minute Neuroscience: Caffeine
2-Minute Neuroscience: Long-Term Depression (LTD)
2-Minute Neuroscience: Long-Term Depression (LTD)
2-Minute Neuroscience: Amyotrophic Lateral Sclerosis (ALS)
2-Minute Neuroscience: Amyotrophic Lateral Sclerosis (ALS)
2-Minute Neuroscience: Pineal Gland
2-Minute Neuroscience: Pineal Gland
2-Minute Neuroscience: Primary Somatosensory Cortex
2-Minute Neuroscience: Primary Somatosensory Cortex
2-Minute Neuroscience: Suprachiasmatic Nucleus
2-Minute Neuroscience: Suprachiasmatic Nucleus
2-Minute Neuroscience: Nucleus Accumbens
2-Minute Neuroscience: Nucleus Accumbens
2-Minute Neuroscience: Ventral Tegmental Area (VTA)
2-Minute Neuroscience: Ventral Tegmental Area (VTA)
2-Minute Neuroscience: Medulla Oblongata
2-Minute Neuroscience: Medulla Oblongata
2-Minute Neuroscience: Vestibular System
2-Minute Neuroscience: Vestibular System
2-Minute Neuroscience: Amygdala
2-Minute Neuroscience: Amygdala
2-Minute Neuroscience: Striatum
2-Minute Neuroscience: Striatum
2-Minute Neuroscience: Epilepsy
2-Minute Neuroscience: Epilepsy
2-Minute Neuroscience: Multiple Sclerosis
2-Minute Neuroscience: Multiple Sclerosis
2-Minute Neuroscience: Alzheimer's Disease
2-Minute Neuroscience: Alzheimer's Disease
2-Minute Neuroscience: Neuromuscular Junction
2-Minute Neuroscience: Neuromuscular Junction
2-Minute Neuroscience: Knee-Jerk Reflex
2-Minute Neuroscience: Knee-Jerk Reflex
2-Minute Neuroscience: Substantia Nigra
2-Minute Neuroscience: Substantia Nigra
2-Minute Neuroscience: Corticospinal Tract
2-Minute Neuroscience: Corticospinal Tract
2-Minute Neuroscience: Basal Ganglia
2-Minute Neuroscience: Basal Ganglia
2-Minute Neuroscience: Motor Cortex
2-Minute Neuroscience: Motor Cortex
2-Minute Neuroscience: Cerebellum
2-Minute Neuroscience: Cerebellum
2-Minute Neuroscience: Effects of Cocaine
2-Minute Neuroscience: Effects of Cocaine
2-Minute Neuroscience: Blood-Brain Barrier
2-Minute Neuroscience: Blood-Brain Barrier
2-Minute Neuroscience: Myelin
2-Minute Neuroscience: Myelin
2-Minute Neuroscience: Pain and the Anterolateral System
2-Minute Neuroscience: Pain and the Anterolateral System
2-Minute Neuroscience: Touch and the Dorsal Columns-Medial Lemniscus
2-Minute Neuroscience: Touch and the Dorsal Columns-Medial Lemniscus
2-Minute Neuroscience: The Cochlea
2-Minute Neuroscience: The Cochlea
2-Minute Neuroscience: The Retina
2-Minute Neuroscience: The Retina
2-Minute Neuroscience: The Hippocampus
2-Minute Neuroscience: The Hippocampus
2-Minute Neuroscience: The Thalamus
2-Minute Neuroscience: The Thalamus
2-Minute Neuroscience: The Brainstem
2-Minute Neuroscience: The Brainstem
2-Minute Neuroscience: The Meninges
2-Minute Neuroscience: The Meninges
2-Minute Neuroscience: The Ventricles
2-Minute Neuroscience: The Ventricles
2-Minute Neuroscience: Directional Terms in Neuroscience
2-Minute Neuroscience: Directional Terms in Neuroscience
2-Minute Neuroscience: Spinal Cord Cross-Section
2-Minute Neuroscience: Spinal Cord Cross-Section
2-Minute Neuroscience: Exterior of the Spinal Cord
2-Minute Neuroscience: Exterior of the Spinal Cord
2-Minute Neuroscience: Reward System
2-Minute Neuroscience: Reward System
2-Minute Neuroscience: Limbic System
2-Minute Neuroscience: Limbic System
2-Minute Neuroscience: Hypothalamus & Pituitary Gland
2-Minute Neuroscience: Hypothalamus & Pituitary Gland
2-Minute Neuroscience: Neuroimaging
2-Minute Neuroscience: Neuroimaging
2-Minute Neuroscience: Early Neural Development
2-Minute Neuroscience: Early Neural Development
2-Minute Neuroscience: Receptors & Ligands
2-Minute Neuroscience: Receptors & Ligands
2-Minute Neuroscience: Lobes/Landmarks of the Brain Surface
2-Minute Neuroscience: Lobes/Landmarks of the Brain Surface
2-Minute Neuroscience: Divisions of the Nervous System
2-Minute Neuroscience: Divisions of the Nervous System
2-Minute Neuroscience: Action Potential
2-Minute Neuroscience: Action Potential
2-Minute Neuroscience: Membrane Potential
2-Minute Neuroscience: Membrane Potential
2-Minute Neuroscience: Synaptic Transmission
2-Minute Neuroscience: Synaptic Transmission
2-Minute Neuroscience: The Neuron
2-Minute Neuroscience: The Neuron
Playlist
  • neurons
  • neurotransmitter
  • signaling
Video Introduction

The content is sourced from: https://youtu.be/W2hHt_PXe5o

The action potential is a momentary reversal of membrane potential that is the basis for signaling within neurons. If you’re unfamiliar with membrane potential, you may want to watch the video on membrane potential before watching this video.

The resting membrane potential of a neuron is around -70 mV. When neurotransmitters bind to receptors on the dendrites of a neuron, they can have an effect on the neuron known as depolarization. This means that they make the membrane potential less polarized, or cause it to move closer to 0.

This chart shows membrane potential on the y axis and time on the x axis. When neurotransmitters interacting with receptors causes repeated depolarization of the neuron, eventually the neuron reaches what is known as its threshold membrane potential. In a neuron with a membrane potential of -70 mV, this is generally around -55 mV. 

When threshold is reached, a large number of sodium channels open, allowing positively charged sodium ions into the cell. This causes massive depolarization of the neuron as the membrane potential reaches 0 and then becomes positive. This is known as the rising phase of the action potential. This influx of positive ions initiates the action potential, which then travels down the neuron.

Eventually the action potential reaches its peak, sodium channels close and potassium channels open, which allow potassium to flow out of the cell. This loss of positive potassium ions promotes repolarization which is known as the falling phase of the action potential. The neuron returns to resting membrane potential, but actually to overshoots it and the cell becomes hyperpolarized. During this phase, known as the refractory period, it is very difficult to cause the neuron to fire again. Eventually the potassium channels close and the membrane returns to resting membrane potential, ready to be activated again. The signal generated by the action potential travels down the neuron and can cause the release of neurotransmitter at the axon terminals to pass the signal to the next neuron. [1]

 

References
  1. Purves D, Augustine GJ, Fitzpatrick D, Hall WC, Lamantia AS, McNamara JO, White LE. Neuroscience. 4th ed. Sunderland, MA. Sinauer Associates; 2008.
Full Transcript
1000/1000
Hot Most Recent
©Text is available under the terms and conditions of the Creative Commons-Attribution ShareAlike (CC BY-SA) license; additional terms may apply. By using this site, you agree to the Terms and Conditions and Privacy Policy.

Confirm

Are you sure to Delete?
Yes No
Cite
If you have any further questions, please contact Encyclopedia Editorial Office.
Challenged, N. 2-Minute Neuroscience: Action Potential. Encyclopedia. Available online: https://encyclopedia.pub/video/video_detail/1255 (accessed on 30 June 2024).
Challenged N. 2-Minute Neuroscience: Action Potential. Encyclopedia. Available at: https://encyclopedia.pub/video/video_detail/1255. Accessed June 30, 2024.
Challenged, Neuroscientifically. "2-Minute Neuroscience: Action Potential" Encyclopedia, https://encyclopedia.pub/video/video_detail/1255 (accessed June 30, 2024).
Challenged, N. (2024, May 13). 2-Minute Neuroscience: Action Potential. In Encyclopedia. https://encyclopedia.pub/video/video_detail/1255
Challenged, Neuroscientifically. "2-Minute Neuroscience: Action Potential." Encyclopedia. Web. 13 May, 2024.
Video Production Service
Feedback