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

神経伝達物質は、神経系の化学伝達物質として働き、ニューロン間のコミュニケーションに不可欠です。
それらは、気分、記憶、睡眠パターン、心拍数などの生理学的および心理的プロセスを調節します。
神経伝達物質にはさまざまなものがあり、それぞれが特定の機能を持っています。
例えば、セロトニンは幸福感や幸福感と関連し、気分、食欲、睡眠に影響を与えます。セロトニンレベルの不均衡は、うつ病や睡眠障害につながる可能性があります。
報酬系の中心であるドーパミンは、喜びとモチベーションに影響を与えます。ドーパミンの調節不全は、パーキンソン病や統合失調症に関連しています。
対照的に、GABAは興奮性を低下させる脳の主要な抑制性神経伝達物質です。低レベルのGABAは、発作、振戦、不眠症に関連しています。
アセチルコリンは、筋肉の活性化と記憶や注意などの認知機能をサポートします。アセチルコリンの不均衡はアルツハイマー病に関連しています。
ノルエピネフリンは注意力とストレス反応に関連しています。これは、闘争・逃走反応にとって非常に重要であり、ストレス時の覚醒度と血圧に影響を与えます。ノルエピネフリンのレベルが低いと、うつ病につながる可能性があります。

 神経伝達物質

Neurotransmitters

神経伝達物質は神経系内で必須の化学伝達物質で、ニューロン間の通信を促進します。これらの化学伝達物質は機能と効果が異なり、神経系の健康と感情的な幸福のさまざまな側面を維持するために不可欠です。

脳と腸で合成されるセロトニンは、幸福感や満足感と関連しており、気分、食欲、睡眠に大きく影響します。脳内または末梢部位で起こるセロトニンの不均衡は、うつ病や睡眠障害につながる可能性があります。

黒質や腹側被蓋野など、脳のいくつかの領域で生成されるドーパミンは、脳の報酬系に不可欠であり、喜びとモチベーションに影響します。ドーパミンの調節不全は、過剰産生によるものであれ、受容体の活動不足によるものであれ、パーキンソン病や統合失調症などの疾患につながる可能性があり、神経精神医学的健康におけるその重要性を強調しています。

中枢神経系の主要な抑制性神経伝達物質である GABA は脳で合成され、神経ネットワーク全体のニューロンの興奮性を抑える働きをします。GABA が不足すると、脳のさまざまな領域で抑制が低下し、発作、震え、不眠症などの神経学的問題として現れることがあります。

中枢神経系と末梢神経系の両方に関与するアセチルコリンは、筋肉の活性化や、記憶、注意などの認知機能を支えます。特に脳内におけるアセチルコリンの不均衡はアルツハイマー病と関連しており、認知プロセスにおけるその重要性を示しています。

主に脳幹の青斑核で生成されるノルエピネフリンは、注意力とストレス反応に重要な役割を果たします。ストレス時に注意力を高め、血圧を調節することで、身体の闘争・逃走反応を促進します。 不足すると、脳と体の両方の反応に影響し、気分が落ち込んだり、ストレス耐性が低下したりすることがあります。

エンドルフィンは主に中枢神経系で生成される体内の自然な鎮痛剤で、痛みの管理と快楽の増進に重要な役割を果たします。エンドルフィンは、身体的および感情的な健康に影響します。エンドルフィンが不足すると、不安や痛みに対する感受性が高まります。

グルタミン酸は、主な興奮性神経伝達物質で、脳全体に広く分布しており、学習と記憶に不可欠な神経伝達を強化する上で極めて重要です。脳のさまざまな領域で発生する可能性がある調節不全は、てんかんや自閉症などの障害に関係しています。

視床下部で生成され、下垂体を通じて血流に放出されるオキシトシンは、社会的行動と感情的な絆に不可欠な役割を果たします。オキシトシンは、さまざまな生殖行動に影響を与え、出産から人間関係の絆に至るまで重要な役割を果たします。

神経伝達物質は、神経系の化学伝達物質として働き、ニューロン間のコミュニケーションに不可欠です。
彼らは生理学的に調節し、...

Education

JoVE Core

Introduction to Psychology

心理学概論

Unit 1

ユニット1

Biopsychology

生物心理学

KEY TERMS AND CONCEPTS

主要用語と概念

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

brain-chemicals-that-shape-mood-and-movement

introduction to biological bases of psychology

introduction-to-biological-bases-of-psychology

Biological Factors Shaping Behavior and Mind

Biopsychology connects biology and psychology by showing how the body influences behavior and mental processes. It focuses on the nervous system, neurotransmitters, hormones, genetics, and evolutionary ideas. Together, these areas help explain why people think, feel, and act the way they do. The nervous system is the main foundation of biopsychology. It has two parts: the central nervous system, or CNS, and the peripheral nervous system, or PNS. The CNS includes the brain and spinal cord and...

nervous system

Nervous System: CNS, PNS, and Reflexes

The nervous system helps the body sense, move, and respond. It works through a network of nerve cells that carry signals around the body. This system has two main parts: the central nervous system and the peripheral nervous system. The central nervous system, or CNS, includes the brain and spinal cord. The brain acts as the body’s control center. It processes sensory information and helps coordinate responses. The spinal cord serves as a major pathway for signals between the brain and the rest...

neurons as communicators of the brain

Neuron Parts and Signal Transmission

Neurons are the cells that carry information through the brain and nervous system. They use electrical and chemical signals to help control body functions, from heartbeat regulation to complex thinking. Their structure is built for fast, efficient communication. The cell body, or soma, is the neuron’s control center. It contains the nucleus, which holds the cell’s genetic material and helps maintain the neuron’s health and function. The cytoplasm around it contains organelles that make...

neuronal communication

How Neurons Send Signals

Neurons send signals through electrochemical communication that supports brain and nervous system function. A key part of this process is the action potential, a rapid electrical change that starts when the neuron’s internal charge rises above a threshold. That signal then travels along the axon to the axon terminal, where it is ready to pass to another neuron. The connection point between two neurons is called a synapse. Synapses can be electrical or chemical, and each type moves information...

neurotransmitters

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...

cerebral hemispheres

How the Brain’s Two Halves Work

The brain’s two cerebral hemispheres work together to process information and control the body. The left and right hemispheres are linked by the corpus callosum, a large bundle of nerve fibers. This connection lets the two sides share sensory and motor information, with each hemisphere controlling the opposite side of the body. The hemispheres are also specialized for different tasks. This is called lateralization, which means certain functions are handled more strongly by one side than the...

lobes of the cerebrum

How Brain Lobes Shape Perception

The cerebral cortex is divided into two hemispheres, and each hemisphere has four lobes: frontal, parietal, temporal, and occipital. Together, these lobes support the brain’s main cognitive and sensory jobs. They work as a team to help you think, feel, move, and respond to the world. The frontal lobe sits behind the forehead and acts as a control center for personality, intelligence, and voluntary muscle movement. It also contains the prefrontal cortex, a region that helps with planning,...

spinal cord

Spinal Cord Nerves and Reflexes

The spinal cord is a major part of the central nervous system. It runs from the base of the brainstem to the lumbar region of the vertebral column. It helps keep the body stable and carries signals between the brain and the rest of the body. The spinal cord sits inside the bony spine for protection. It is divided into 30 segments that match the vertebrae. Each segment connects to a specific body region through paired spinal nerves. These spinal nerves are grouped by where they leave the...

lateralization

Brain Hemisphere Specialization

Brain hemisphere specialization divides mental tasks between the left and right sides of the brain. This split can improve neural efficiency and support more complex human abilities. Each hemisphere tends to handle the work it does best, which helps cognitive processing run more smoothly. The left hemisphere is especially strong in logic and language-related tasks. It supports analytical thinking, which means breaking a problem into parts and solving it step by step. This is important for...

human genetics

Genes, Behavior, and Mental Health

Human genetics explains how genes can influence behavior, emotions, and mental health. It also shows how a person’s genetic code can shape physical traits and the risk of disease. Each individual carries a unique set of genes, so the effects can be subtle or more noticeable. Genes help direct how the brain, hormones, and cells work. These body systems are all shaped by genetic instructions, and they help produce differences in thoughts and behavior. Human genetics therefore links biology with...

genetic material

Chromosomes, DNA, and Inherited Traits

Chromosomes, DNA, and inherited traits explain how genetic information is organized in the human body. Each cell contains a nucleus, and the nucleus holds 46 chromosomes arranged in 23 pairs. These chromosomes are tightly coiled structures made of DNA, which carries the instructions passed from parents to offspring. An individual inherits one set of chromosomes from the mother through the egg and one set from the father through the sperm. This combination creates a unique genetic makeup. Of...

genetic variation

How Alleles Shape Inherited Traits

Genetic variation helps explain why individuals in the same species can look and act differently. It comes from differences in DNA sequences. This diversity matters because it helps a species survive and adapt when the environment changes. Variation starts at fertilization, when an egg and sperm cell join. Each of these cells carries 23 chromosomes, so the fertilized egg can have up to 46 chromosomes. Chromosomes are long DNA strands that contain genes, which are the basic units of heredity. <br...

behavioral genetics and its designs

How Behavior Genetics Studies Inheritance

Behavior genetics studies how inherited genes influence human behavior. It looks at how genes passed from parents to offspring help shape behavioral traits and tendencies. The field also examines how inherited factors and environmental influences work together. Researchers use family studies, twin studies, and adoption studies to separate genetic and environmental effects. Family studies track traits within biological families to find possible genetic patterns. They have helped identify...

organization of the brain

Brain Regions and Their Key Functions

The brain is the main control center of the nervous system. It processes sensory input, makes decisions, and directs body actions. Its structure is divided into the hindbrain, midbrain, and forebrain, and each part supports important functions. The hindbrain sits at the base of the brain. It helps regulate automatic life processes. The medulla oblongata controls involuntary functions such as heartbeat, breathing, and blood pressure. Nearby, the pons acts as a bridge between brain regions,...

evolutionary psychology

Evolutionary Psychology and Human Behavior

Evolutionary psychology explains human behavior and mental processes through natural selection. It uses Darwin’s idea that traits can spread when they help survival and reproduction. In this view, some common behaviors may be adaptations that were useful to our ancestors. One clear example is fear of snakes. This fear is nearly universal, which suggests that early humans who avoided snakes were more likely to survive deadly encounters. Over many generations, that caution could be passed on and...

neuroplasticity

How the Brain Rewires Itself

Neuroplasticity is the brain’s ability to change its structure and function in response to learning, experience, or injury. It allows neural circuits to reorganize over time. This flexibility supports lifelong development and adaptation. One part of this change begins when dendrites and axons grow. Dendrites receive signals, and axons send them. As they grow, the brain’s circuitry becomes more complex and can support more connections. Next, synaptogenesis occurs. Synaptogenesis is the...

brain imaging

Brain Scanning Techniques

Brain scanning techniques help scientists and doctors see the structure and activity of the human brain. These methods support the diagnosis, study, and treatment of neurological and psychiatric disorders. The main techniques include computerized axial tomography, or CT, positron-emission tomography, or PET, magnetic resonance imaging, or MRI, functional magnetic resonance imaging, or fMRI, and transcranial magnetic stimulation, or TMS. CT scans use X-ray technology to build detailed...

the endocrine system

Endocrine Glands and Hormone Signals

The endocrine system is a network of glands that send hormone signals through the body. Hormones are chemical messengers that help control many body functions. They enter the bloodstream and travel to cells with the right receptors, or target sites, so the signal can be received. Because of this, hormone effects are widespread, unlike the more localized effects of neurotransmitters. This signaling helps the body keep a stable internal environment, called homeostasis. Several major glands...

somatosensory, motor, and association cortex

somatosensory-motor-and-association-cortex

Brain Cortex Areas for Sensation and Movement

The brain cortex uses separate areas for sensation, movement, and higher thinking. The somatosensory cortex is in the parietal lobes. It helps the brain interpret touch, temperature, and proprioception, which is awareness of body position. The somatosensory cortex has an organized map of the body. Neurons at the top of this region mainly process signals from the lower body. Neurons at the bottom handle input from the upper body. This layout helps the brain locate sensory input with precision.

major hormones and their functions

Hormone Imbalances and Their Effects

Hormones are chemical messengers made by endocrine glands. They help control body functions and keep internal conditions stable. When hormone levels shift too far up or down, normal body processes can be disrupted. Several major hormones have clear roles in the body. Oxytocin is made in the hypothalamus and released by the pituitary gland. It supports social bonding, childbirth, and lactation. Low oxytocin can affect social interaction and stress response, and it may contribute to depression.

inheritance

Genes, Traits, and Mendel's Rules

Genes, traits, and Mendel's rules explain how characteristics pass from parents to offspring. Gregor Mendel's pea plant experiments changed how scientists understand heredity. His work showed that traits are controlled by discrete units inside organisms called genes. Genes usually come in pairs. One gene is inherited from each parent, and together they make a person's genotype. Genotype is the genetic blueprint for potential traits. Examples include blood type, eye color, and inherited...

gene-environment interactions

How Environment Shapes Gene Expression

Environmental factors can change how genes are expressed. Gene expression is a dynamic process, and traits can differ even in people with the same DNA. Radiation, temperature, behavior, nutrition, and stress all help shape the final outcome. The reaction range helps explain this process. It means genes set a possible range for a trait, while the environment helps decide where a person falls within that range. For example, genetics may allow a height range from 5'5" to 6'1", but nutrition,...

heritability

Heritability and the Environment

Heritability describes how genetic differences contribute to trait variation in a population. It is a statistical measure, so it shows how much of the spread in a trait can be linked to genes across a group. It does not tell you how “genetic” a trait is in an individual person. Heritability is usually expressed as a percentage. That percentage can change depending on which population is studied and what environmental conditions are present. This means heritability is context-dependent, not...

natural selection and adaptation

Adaptation in Changing Environments

Natural selection explains how organisms become better suited to their environments over time. It favors individuals with traits that improve survival and reproduction. Adaptation is the result. It includes genetic changes that help an organism function in specific conditions, such as extreme cold or thinner air at high altitudes. Adaptation is not only physical. Psychological adaptation also helps organisms, especially humans, succeed in their surroundings. These responses come from both...

natural selection and mating preferences

How Selection Shapes Mate Choice

Natural selection and mating preferences work together to shape how organisms survive and reproduce. Natural selection favors traits that help an organism fit its environment. Mating preferences are part of sexual selection, which influences who mates with whom and how genes are passed on. Evolutionary psychologists argue that these preferences are tied to instincts that support reproduction. For females, conception, pregnancy, and nursing create a strong need to choose mates who can offer...

criticisms of the evolutionary perspective

criticisms-of-the-evolutionary-perspective

Social Learning vs. Evolutionary Psychology

Social learning theory and evolutionary psychology offer two different ways to explain sexual behavior. A study in which strangers gave students compliments and then asked for casual sex showed a clear gender gap. None of the women said yes, while 70% of the men agreed. Evolutionary psychology explains this result by arguing that natural selection may have shaped women to be more selective about sexual partners. From this view, selectivity can help improve survival and reproductive success. It...

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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