Name: how muscles get their names
Uploaded: 2024-03-28T14:28:27.000Z
Duration: 1 min 19 s
Channel: JoVE

K12 Standards

ohios-learning-standards-and-model-curriculum

Ohio’s Learning Standards and Model Curriculum

9-12

Human Anatomy and Physiology

Support And Motion

Muscular System

Naming Skeletal Muscles

Les noms des muscles squelettiques sont basés sur divers facteurs, tels que l’emplacement, les traits physiques et les fonctions.
Souvent, les noms des muscles indiquent leur emplacement. Par exemple, « brachium » fait référence au bras. Ainsi, le nom de biceps brachial suggère son emplacement dans le bras.
De plus, le préfixe « biceps » dans son nom indique les deux origines du biceps brachial dans l'omoplate.
Le deltoïde est un muscle de l’épaule de forme triangulaire et tire son nom de sa ressemblance avec la lettre grecque delta.
Lorsque des points d’attache sont utilisés pour le nommage, l’origine précède l’insertion. Par exemple, le muscle qui provient de l’apophyse styloïde de l’os temporal et qui s’insère dans le corps de l’hyoïde est appelé muscle stylohyoïde.
Certains noms de muscles font référence à l’orientation des fascicules à l’intérieur d’eux. Par exemple, le préfixe droit dans le muscle droit fémoral indique que ses fascicules sont parallèles à l’axe longitudinal du fémur.
Enfin, les noms des muscles peuvent également être basés sur leur taille et leur fonction. Par exemple, le longus adducteur est un long muscle de l’articulation de la hanche qui aide à l’adduction des jambes.

dénomination des muscles squelettiques

La dénomination des quelques 700 muscles du corps humain repose sur un ensemble de critères conçus pour fournir des informations descriptives sur chaque muscle, facilitant ainsi leur identification et leur mémorisation.

Les facteurs clés utilisés pour nommer les muscles comprennent :

<ul style="list-style-type: disc; margin-left: 35px;">
	<li>Région du corps : Certains muscles du corps sont classés en fonction de leur emplacement ou de leur association avec une zone spécifique. Par exemple, le muscle temporal se trouve dans la région de la tête, tandis que le muscle brachial se trouve dans le bras.</li>
	<li>Position et profondeur : Les muscles visibles à la surface du corps sont souvent appelés « externus » ou « superficialis », tandis que les muscles plus profonds sont appelés « internus » ou « profundus ». Les muscles qui positionnent ou stabilisent un organe sont appelés « extrinsèques », tandis que ceux situés entièrement à l'intérieur d'un organe sont « intrinsèques ».</li>
	<li>Direction : Certains muscles sont nommés en fonction de la direction dans laquelle ils courent par rapport à l'axe longitudinal du corps. « Transversus » fait référence aux muscles qui traversent cet axe, tandis que « oblique » désigne les muscles qui courent selon un angle oblique.</li>
	<li>Disposition des fascicules : Le terme « rectus » est utilisé pour les muscles dotés de fascicules droits s'étendant le long de leur axe longitudinal. Par exemple, « rectus abdominis » fait référence à un muscle de l'abdomen doté de fascicules droits.</li>
	<li>Caractéristiques structurelles : Certains muscles portent le nom de leurs caractéristiques structurelles distinctives, telles que le nombre de tendons d'origine, leur forme et leur taille. Par exemple, le « biceps brachial » a deux tendons d'origine, le « trapèze » a une forme trapézoïdale et le « longus » fait référence aux muscles longs.</li>
	<li>Origine et insertion : De nombreux noms de muscles indiquent l'origine et les points d'insertion spécifiques. Par exemple, le « génioglosse » prend naissance au niveau du menton ou « généion » et s'insère dans la langue ou « glossus ».</li>
	<li>Action : De nombreux muscles portent le nom de leur fonction ou action principale, comme les fléchisseurs, les extenseurs, les pronateurs, les abducteurs, les adducteurs et les rotateurs.</li>
	<li>Occupations ou habitudes particulières : Quelques muscles portent des noms liés à des mouvements spécifiques associés à certaines occupations ou habitudes. Par exemple, le « buccinateur » comprime les joues comme s'il sonnait dans une trompette, et le « sartorius », le muscle le plus long du corps, est actif lors du croisement des jambes, rappelant la position assise d'un tailleur.</li>
</ul>

Dénomination des muscles squelettiques

Les noms des muscles squelettiques sont basés sur divers facteurs, tels que l’emplacement, les traits physiques et les fonctions.
Souvent, les noms des muscles indiquent leur emplacement. Pour...

Education

Enseignement

JoVE Core

Anatomy and Physiology

Anatomie et physiologie

Unit 1

Unité 1

The Muscular System

Le système musculaire

KEY TERMS AND CONCEPTS

TERMES ET CONCEPTS CLÉS

how muscles get their names

Skeletal muscle names are built from features that help identify each muscle. The names of the roughly 700 muscles in the human body can point to where a muscle is found, what it looks like, or how it works. That makes the names easier to learn and remember.

Many muscle names describe the region of the body. The temporalis muscle is in the head region, while the brachialis is in the arm. Other names describe position and depth. Muscles near the surface may be called externus or superficialis, while deeper muscles may be called internus or profundus.

Some names also show where a muscle sits in relation to an organ. Muscles that help position or support an organ are called extrinsic. Muscles located entirely within an organ are called intrinsic. Direction is another clue. Transversus means the muscle runs across the body's long axis, and oblique means it runs at a slant.

Muscle names can also describe the arrangement of muscle fibers, or fascicles. Rectus is used for muscles with straight fascicles that run along the long axis, such as the rectus abdominis. Other names point to structure. Biceps brachii has two tendons of origin, trapezius has a trapezoid shape, and longus refers to a long muscle.

Some muscle names show where a muscle starts and ends. Genioglossus begins at the chin, or geneion, and inserts into the tongue, or glossus. Others describe action, such as flexor, extensor, pronator, abductor, adductor, and rotator. A few names even reflect habits or occupations. The buccinator compresses the cheeks as if blowing a trumpet, and the sartorius is linked to the tailor's crossed-leg sitting position.

How Muscles Get Their Names

the muscular system

Muscles, Bones, and Body Movement

The muscular system helps the body move, stay stable, and carry out internal work. It includes three kinds of muscle tissue: skeletal, smooth, and cardiac muscle. Each type has a different role in the body. Skeletal muscles are under conscious control, so people can move them on purpose. They attach to bones by tendons, and their contraction and relaxation make actions like walking and lifting possible. These muscles also produce heat during physical activity, which helps maintain body...

fascicle arrangement in skeletal muscles

How Muscle Fiber Layout Shapes Movement

Skeletal muscle fascicles are bundles of muscle fibers, and their layout helps determine how a muscle moves. The way these fascicles are arranged affects both power and range of motion. Different arrangements give muscles different mechanical strengths. Parallel muscles have fascicles that run parallel to the long axis of the muscle. Common examples are the biceps brachii and the rectus abdominis. When these muscles contract, they shorten and become wider. They can shorten by about 30% of...

muscle coordination and action

Muscles That Work Together in Movement

Muscles work together to create smooth, purposeful movement. Actions such as flexion, extension, adduction, abduction, and rotation depend on this coordination. The body uses several muscles in a controlled way so joints and bones move as needed. Four functional roles help describe how muscles act during movement: agonist, antagonist, synergist, and fixator. An agonist, also called the prime mover, is the main muscle that produces a specific motion. During a bicep curl, the biceps brachii is...

naming skeletal muscles

Skeletal muscle names are built from features that help identify each muscle. The names of the roughly 700 muscles in the human body can point to where a muscle is found, what it looks like, or how it works. That makes the names easier to learn and remember. Many muscle names describe the region of the body. The temporalis muscle is in the head region, while the brachialis is in the arm. Other names describe position and depth. Muscles near the surface may be called externus or superficialis,...

axial and appendicular muscles

Muscles for Movement and Body Support

Skeletal muscles support movement and body structure. They are grouped into axial muscles and appendicular muscles based on where they are found and what they do. Axial muscles lie along the body’s midline. They connect with the axial skeleton, which includes the skull, spine, ribs, and sternum. These muscles help with facial expressions, head and neck movement, speaking, and eating. They also help control movement of the vertebral column with the back muscles. The trunk also contains...

muscles for facial expressions

How Facial Muscles Shape Expression

Facial muscles shape human expression by moving the skin of the face and scalp. These craniofacial muscles are thin skeletal muscles that lie just beneath the skin. They help create the nonverbal signals people use to show emotion and intention. There are about 20 of these muscles. Most begin on bones or fibrous parts of the skull and then extend outward to attach to the skin. They are called muscles of facial expression, or mimetic muscles, because they reflect feelings through movement. <br...

muscles of the eye

Eye Muscles and How They Focus

The eye muscles control movement, focus, and eyelid opening. The human eye uses ten muscles: six extraocular muscles, three intraocular muscles, and one main eyelid retractor muscle. The six extraocular muscles sit around the eyeball and move it in different directions. The lateral rectus pulls the eye outward, and the medial rectus turns it inward toward the nose. The superior rectus and inferior rectus move the eye up and down, while the superior oblique and inferior oblique rotate the eye.

muscles of the anterior neck

Anterior Neck Muscles by Region

The anterior neck muscles are grouped by where they sit in the front of the neck. They include superficial muscles, suprahyoid muscles, and infrahyoid muscles. This layout helps show how the neck muscles are organized around the hyoid bone. The superficial muscles are the most visible muscles in the front of the neck. They include the platysma and sternocleidomastoid, often called the SCM. The platysma is a broad, thin muscle that stretches from the chest and shoulders to the lower jaw and...

muscles that move the head

How Neck Muscles Guide Head Motion

Neck muscles guide head motion by working together to bend, turn, and lift the head. They help with rotation, flexion, extension, and lateral bending. The sternocleidomastoid, or SCM, plus the suprahyoid and infrahyoid muscles are major head flexors. The SCM runs from the sternum and clavicle to the mastoid process of the temporal bone. When both SCM muscles contract, they bend the head forward. When only one side contracts, it bends the head toward that side or turns the head to the opposite...

muscles of the vertebral column

How Back Muscles Support Spine Movement

Back muscles that lie deep to the thoracolumbar fascia are called intrinsic, or true, back muscles. They are grouped into four layers. These layers are the superficial, intermediate, deep, and deepest layers. The superficial layer mainly includes the splenius muscles. These are the splenius capitis and splenius cervicis. They help move the head and cervical spine by supporting extension, rotation, and lateral bending. The splenius capitis runs from the upper thoracic and lower cervical...

muscles of the thorax

How Thorax Muscles Drive Breathing

Thorax muscles help breathing and support movement in the upper body. They also help keep the chest stable. Together, these muscles make the rib cage move while the lungs fill and empty. The diaphragm is the main breathing muscle in the thorax. It is a wide, dome-shaped muscle that separates the thoracic cavity from the abdominal cavity. It starts below the rib cage and lumbar vertebrae and attaches to the central tendon. When it contracts, it flattens and moves downward. This increases the...

muscles of the abdomen

Abdominal Wall Muscles and Support

The abdominal wall muscles support the abdominal cavity and help protect the internal organs. This flexible wall is bordered by the xiphoid process and costal margins at the top, the vertebral column at the back, and the pelvic bones and inguinal ligament at the bottom. It is divided into the anterolateral region and the posterior region. The anterolateral region includes five paired muscles in two groups. The lateral group contains the external oblique, internal oblique, and transversus...

muscles of the pelvic floor and perineum

Pelvic Floor Muscles and Continence

The pelvic floor and perineal muscles support the pelvic organs and help control continence. They also play roles in sexual function, childbirth, and core stability. These muscles are usually divided into a superficial perineal layer and a deeper pelvic floor layer. The perineum is a diamond-shaped area below the pelvic diaphragm. It is split into an anterior urogenital triangle and a posterior anal triangle. The urogenital triangle contains the external genitals and includes the superficial...

muscles of the shoulder

Shoulder Girdle Muscles and Scapula Motion

Shoulder girdle muscles stabilize the clavicle and scapula, and that support helps the humerus move efficiently. Scapular movement also works with humerus movement and extends the arm’s range of motion. Raising the arm overhead depends on upward rotation of the scapula. The anterior thoracic muscles include the serratus anterior, subclavius, and pectoralis minor. The serratus anterior, often called the boxer’s muscle, starts on the first to eighth or ninth ribs and inserts along the superior...

muscles that move the arm

Arm Muscles and Their Movements

Arm muscles move the humerus through flexion, extension, abduction, adduction, and rotation. Nine muscles help produce these arm movements. Two of them, the pectoralis major and latissimus dorsi, come from the axial skeleton. The other seven begin on the scapula and are called scapular muscles. The pectoralis major has two origins, or heads. Its clavicular head starts on the medial half of the clavicle. Its sternocostal head starts on the costal cartilages of ribs 1 through 6, the sternum, and...

muscles that move the forearm

Forearm Muscles for Elbow and Rotation

Forearm muscles help the arm bend, straighten, and rotate at the elbow and radioulnar joints. They are grouped as forearm flexors, forearm extensors, forearm pronators, and forearm supinators. The flexors and extensors act on the elbow joint. The pronators and supinators act on the radioulnar joints. The forearm flexors are the biceps brachii, brachialis, and brachioradialis. The biceps brachii has two heads. Its long head begins at the supraglenoid tubercle of the scapula, and its short head...

muscles of the forearm that move the hand and fingers

muscles-of-the-forearm-that-move-the-hand-and-fingers

Forearm Flexors, Extensors, and Wrist Support

The forearm muscles that move the wrist, hand, and fingers are grouped into anterior and posterior compartments. These muscles work together to bend, straighten, and stabilize the hand and digits. They also connect to the bones of the wrist and hand in organized layers. The anterior compartment contains the flexor muscles. These muscles usually start at the humerus and attach to the carpals, metacarpals, and phalanges. The superficial layer includes the flexor carpi radialis, palmaris longus,...

muscles that move the thigh

Hip Muscles That Move the Thigh

Hip muscles control thigh movement by connecting the pelvic girdle to the femur. The iliopsoas is one key muscle group. It is made of the psoas major and iliacus muscles. Both share a common insertion on the lesser trochanter of the femur. The gluteal muscles also play major roles. The gluteus maximus starts on the posterior ilium, sacrum, coccyx, and thoracolumbar fascia. It inserts on the iliotibial tract and the gluteal tuberosity of the femur. This muscle is the chief extensor of the femur.

muscles that move the leg

Thigh Muscles Behind Leg Motion

Thigh muscles help move the leg through flexion, extension, adduction, and rotation. They are grouped into the anterior, medial, and posterior compartments of the thigh. Each group supports a different part of leg motion at the hip and knee. The anterior compartment includes the quadriceps femoris, the most visible thigh muscle group. It helps extend the leg and flex the thigh. The quadriceps is made of four muscles: vastus lateralis, vastus medialis, vastus intermedius, and rectus femoris.

muscles of the leg that move the foot and toes

muscles-of-the-leg-that-move-the-foot-and-toes

Leg Muscle Groups for Foot Motion

The leg muscles that move the foot and toes are organized into the anterior, lateral, and posterior compartments. Each compartment has a distinct set of muscles with its own actions. Together, they control dorsiflexion, plantar flexion, inversion, eversion, and toe movement. The anterior compartment includes the tibialis anterior, extensor hallucis longus, extensor digitorum longus, and fibularis tertius. The tibialis anterior runs along the lateral surface of the tibia, is easy to feel, and...

key terms and concepts

Learn how skeletal muscles are named by location, depth, direction, fiber pattern, shape, origin, action, and familiar examples like buccinator and sartorius.

How Muscles Get Their Names | JoVE K12

anatomy and physiology

JoVE Core Anatomy and Physiology showcases the anatomical and physiological details of the human body in comprehensive, clear, and engaging video animations. This collection of lessons focuses on the structures, components, functions, and requirements of the human body. It is complemented by scientist-in-action videos that demonstrate the application of this knowledge in real-world medical and research settings.

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9-12.HA.1.4

Florida Department of Education

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Skeletal System

How Muscles Get Their Names

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