Name: brain chemicals that shape mood and movement
Uploaded: 2024-08-29T22:13:36.000Z
Duration: 1 min 31 s
Channel: JoVE

Les neurotransmetteurs agissent comme des messagers chimiques dans le système nerveux, essentiels à la communication entre les neurones.
Ils régulent les processus physiologiques et psychologiques, notamment l’humeur, la mémoire, les habitudes de sommeil et le rythme cardiaque.
Il existe différents neurotransmetteurs, chacun ayant des fonctions spécifiques.
Par exemple, la sérotonine, associée au bien-être et au bonheur, influence l’humeur, l’appétit et le sommeil. Les déséquilibres dans les niveaux de sérotonine peuvent entraîner une dépression et des problèmes de sommeil.
La dopamine, centrale dans le système de récompense, affecte le plaisir et la motivation. La dérégulation de la dopamine est liée à la maladie de Parkinson et à la schizophrénie.
En revanche, le GABA est le principal neurotransmetteur inhibiteur du cerveau qui réduit l'excitabilité. De faibles niveaux de GABA sont liés aux convulsions, aux tremblements et à l’insomnie.
L’acétylcholine soutient l’activation musculaire et les fonctions cognitives telles que la mémoire et l’attention. Les déséquilibres de l'acétylcholine sont associés à la maladie d'Alzheimer.
La noradrénaline est liée à l’attention et à la réponse au stress. Il est crucial pour la réaction de combat ou de fuite et influence la vigilance et la pression artérielle pendant le stress. De faibles niveaux de noradrénaline peuvent conduire à la dépression.

neurotransmetteurs

Neurotransmitters

Les neurotransmetteurs sont des messagers chimiques essentiels au sein du système nerveux, facilitant la communication entre les neurones. Ces messagers chimiques, dont la fonction et l’effet varient, sont essentiels au maintien de divers aspects de la santé neurologique et du bien-être émotionnel.

<ol style="display: flex; flex-direction: column; gap: 10px;">
 <li>La sérotonine, synthétisée dans le cerveau et les intestins, est associée aux sentiments de bien-être et de bonheur et influence considérablement l’humeur, l’appétit et le sommeil. Les déséquilibres de la sérotonine, que ce soit dans le cerveau ou dans les sites périphériques, peuvent entraîner une dépression et des troubles du sommeil.
 </li>
 <li>La dopamine, produite dans plusieurs zones du cerveau, notamment la substance noire et l’aire tegmentale ventrale, est essentielle au système de récompense du cerveau et affecte le plaisir et la motivation. La dysrégulation de la dopamine, qu’elle soit due à une surproduction ou à une activité insuffisante des récepteurs, peut entraîner des troubles tels que la maladie de Parkinson et la schizophrénie, soulignant son rôle essentiel dans la santé neuropsychiatrique.
 </li>
 <li>Le GABA, principal neurotransmetteur inhibiteur du système nerveux central, est synthétisé dans le cerveau et agit pour réduire l’excitabilité neuronale dans l’ensemble du réseau neuronal. Des niveaux insuffisants de GABA, entraînant une diminution de l’inhibition dans diverses régions du cerveau, peuvent se manifester par des problèmes neurologiques tels que des crises, des tremblements et de l’insomnie.
 </li>
 <li>L’acétylcholine, impliquée dans les systèmes nerveux central et périphérique, soutient l’activation musculaire et les fonctions cognitives telles que la mémoire et l’attention ; les déséquilibres, en particulier dans le cerveau, sont liés à la maladie d’Alzheimer, ce qui montre son importance dans les processus cognitifs.
 </li>
 <li>La norépinéphrine, produite principalement dans le locus coeruleus du tronc cérébral, joue un rôle crucial dans l’attention et la réponse au stress. Elle facilite la réponse de combat ou de fuite du corps en modulant la vigilance et en régulant la pression artérielle pendant le stress. Les carences affectant à la fois les réponses du cerveau et du corps, peuvent entraîner une humeur dépressive et une diminution de la résilience au stress.
 </li>
 <li>Les endorphines, analgésiques naturels du corps produits principalement dans le système nerveux central, jouent un rôle crucial dans la gestion de la douleur et l’amélioration du plaisir. Elles affectent le bien-être physique et émotionnel. Une carence en endorphines peut entraîner une augmentation de l’anxiété et de la sensibilité à la douleur.
 </li>
 <li>Le glutamate, le neurotransmetteur excitateur prédominant, est largement distribué dans le cerveau et joue un rôle essentiel dans l’amélioration de la communication neuronale, essentielle à l’apprentissage et à la mémoire. Le déséquilibre, qui peut survenir dans diverses régions du cerveau, est impliqué dans des troubles tels que l’épilepsie et l’autisme.
 </li>
 <li>L’ocytocine, produite dans l’hypothalamus et libérée dans la circulation sanguine par l’hypophyse, joue un rôle essentiel dans le comportement social et les liens affectifs. Elle influence toute une série de comportements reproductifs et est essentielle dans des contextes allant de l’accouchement à la création de liens relationnels.
 </li>
</ol>

Neurotransmetteurs

Les neurotransmetteurs agissent comme des messagers chimiques dans le système nerveux, essentiels à la communication entre les neurones.
Ils régulent les facteurs physiologiques et ...

Education

Enseignement

JoVE Core

Introduction to Psychology

Introduction à la psychologie

Unit 1

Unité 1

Biopsychology

Biopsychologie

KEY TERMS AND CONCEPTS

TERMES ET CONCEPTS CLÉS

brain chemicals that shape mood and movement

Neurotransmitters are chemical messengers that help neurons communicate. They play a major role in nervous system function, as well as in mood, movement, sleep, and social behavior.

Serotonin is made in the brain and intestines. It is linked to well-being and happiness, and it helps regulate mood, appetite, and sleep. When serotonin levels are out of balance in the brain or in peripheral sites, depression and sleep problems can occur.

Dopamine is produced in several brain areas, including the substantia nigra and the ventral tegmental area. It is a key part of the brain’s reward system and affects pleasure and motivation. Problems with dopamine signaling, such as too much production or too little receptor activity, are associated with Parkinson’s disease and schizophrenia.

GABA, or gamma-aminobutyric acid, is the main inhibitory neurotransmitter in the central nervous system. It is made in the brain and helps lower neuron activity across neural networks. Low GABA levels can reduce inhibition in the brain and may lead to seizures, tremors, and insomnia.

Acetylcholine works in both the central and peripheral nervous systems. It supports muscle activation and also helps with memory and attention. When acetylcholine is out of balance in the brain, it is linked to Alzheimer’s disease.

Norepinephrine is produced mainly in the locus coeruleus in the brainstem. It helps control attention and the stress response. It also supports the fight-or-flight response by increasing alertness and helping regulate blood pressure during stress. Low norepinephrine can contribute to depressed mood and weaker stress resilience.

Endorphins are the body’s natural pain relievers. They are produced mainly in the central nervous system and help reduce pain while increasing pleasure. A lack of endorphins can increase anxiety and make pain feel stronger.

Glutamate is the main excitatory neurotransmitter. It is found widely across the brain and strengthens neuron-to-neuron communication. This makes it important for learning and memory. When glutamate is not properly regulated, it has been linked to epilepsy and autism.

Oxytocin is produced in the hypothalamus and released into the bloodstream through the pituitary gland. It plays an important role in social behavior and emotional bonding. It also supports reproductive behaviors and is involved in processes from childbirth to relationship bonding.

Brain Chemicals That Shape Mood and Movement

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key terms and concepts

Explore key neurotransmitters and how they affect mood, sleep, movement, learning, stress, pain, and social bonding in the nervous system.

Brain Chemicals That Shape Mood and Movement | JoVE K12

JoVE Core Introduction to Psychology offers an engaging learning experience on the fundamental principles of psychology through concise video lessons. Students will explore important topics such as cognitive processes, emotional regulation, and neural mechanisms, establishing a strong foundation in the study of the mind and human behavior. This series provides an accessible and captivating approach to grasp the essential concepts of the discipline.

introduction to psychology

Brain Chemicals That Shape Mood and Movement

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