Domains & Types » Medicine » Muscle

Muscle

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A muscle is a contractile form of tissue which animals use to effect movement. more

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Levator ani Anatomical structure
The Levator ani is a broad, thin muscle, situated on the side of the pelvis. It is attached to the inner surface of the side of the lesser pelvis, and unites with its fellow of the opposite side to form the greater part of the floor of the pelvic...
Trapezius muscle Anatomical structure
In human anatomy, the trapezius is a large superficial muscle which extends longitudinally from the occipital bone to the lower thoracic vertebrae, and laterally to the spine of the scapula (shoulder blade). The trapezius has 3 functional regions:...
Biceps brachii muscle Anatomical structure
In human anatomy, the biceps brachii is a muscle located on the upper arm. The biceps has several functions, the most important simply being to flex the elbow and to rotate the forearm. The term biceps brachii is a Latin phrase meaning "two-headed...
Brachioradialis Anatomical structure
Brachioradialis is a muscle of the forearm that acts to flex the forearm at the elbow. It is also capable of both pronation and supination, depending on the position of the forearm. It is attached to the distal styloid process of the radius and the...
Latissimus dorsi muscle Anatomical structure
The latissimus dorsi (plural: latissimi dorsi) is the large, flat, dorso-lateral muscle on the trunk, posterior to the arm, and partly covered by the trapezius on its median dorsal region. The latissimus dorsi is a triangular, flat muscle, which...
Brachialis muscle Anatomical structure
The brachialis (brachialis anticus) is a muscle in the upper arm that flexes the elbow joint. It lies just deep to biceps brachii, and is a more powerful flexor of the elbow. It makes up part of the floor of the region known as the cubital fossa. ...
Pronator quadratus Pronator-quadratus Anatomical structure
Pronator quadratus is a square shaped muscle on the distal forearm that acts to pronate (turn so the palm faces downwards) the hand. As it is on the anterior side of the arm, it is innervated by a branch of the median nerve, the anterior...
Sartorius muscle Anatomical structure
The Sartorius muscle is a long thin muscle that runs down the length of the thigh. It is the longest muscle in the human body. Its upper portion forms the lateral border of the femoral triangle. The sartorius muscle arises by tendinous fibres from...
Lumbricals of the hand Anatomical structure
The lumbrical muscles are intrinsic muscle in the finger that allow flexion at the metacarpophalangeal joint, while maintaining extension at the interphalangeal joints. There are four of these small, worm-like muscles on each hand. These muscles...
Flexor digitorum profundus muscle Anatomical structure
In human anatomy, the flexor digitorum profundus is a muscle in the forearm that flexes the finger. It is considered to be an extrinsic muscle because its action is at a different location than the main body of the muscle. Flexor digitorum...
Thenar eminence Anatomical structure
The thenar eminence is the body of muscle on the palm of the human hand just beneath the thumb. The skin overlying this region is the area stimulated when trying to elicit a palmomental reflex. The muscles in this location are usually innervated by...
Flexor digitorum superficialis muscle Anatomical structure
Flexor digitorum superficialis (flexor digitorum sublimis) is an extrinsic flexor muscle of the finger at the proximal interphalangeal joints. It is in the anterior compartment of the forearm. It is sometimes considered to be the deepest part of...
Extensor carpi radialis longus muscle Anatomical structure
Extensor carpi radialis longus is one of the five main muscle that control movement at the wrist. This muscle is quite long, starting on the lateral side of the humerus, and attaching to the base of the second metacarpal bone of the index finger. ...
Extensor carpi radialis brevis muscle Anatomical structure
The Extensor carpi radialis brevis is shorter and thicker than the longus, beneath which it is placed. It arises from the lateral epicondyle of the humerus, by a tendon common to it and the three following muscles; from the radial collateral...
Extensor carpi ulnaris muscle Anatomical structure
Extensor carpi ulnaris is a muscle located in the human forearm that acts to extend and adduct the wrist. Being an extensor muscle, extensor carpi ulnaris is on the posterior side of the forearm. It originates from the lateral epicondyle of the...
Flexor carpi radialis muscle Flexor-carpi-radialis Anatomical structure
In anatomy, flexor carpi radialis is a muscle of the human forearm that acts to flex and abduct the hand. This muscle starts at the medial epicondyle of the humerus (as does flexor carpi ulnaris muscle) and attaches to the anterior side of the base...
Fibularis longus Anatomical structure
In human anatomy, the peroneus longus (also known as fibularis longus) is a superficial muscle in the lateral compartment of the leg, and acts to evert and plantar flex the ankle. It is situated at the upper part of the lateral side of the leg, and...
Levator labii superioris alaeque nasi muscle Anatomical structure
The levator labii superioris alaeque nasi muscle is, translated from Latin, the "lifter of the upper lip and of the wing of the nose". It has the longest name of any muscle in an animal. The muscle is attached to the upper frontal process of the...
Extensor hallucis longus muscle Tibialis anterior labeled at top center, and extensor muscles labeled at right Anatomical structure
The Extensor hallucis longus is a thin muscle, situated between the Tibialis anterior and the Extensor digitorum longus that functions to extend the big toe, dorsiflex the foot, and assists with foot inversion. It arises from the anterior surface...
Temporalis muscle Anatomical structure
The temporalis muscle is one of the muscles of mastication. It arises from the temporal fossa and the deep part of temporal fascia. It passes medial to the zygomatic arch and inserts onto the coronoid process of the mandible. The temporalis muscle...
Ischiocavernosus muscle Anatomical structure
The ischiocavernosus muscle is a muscle just below the surface of the perineum, present in both men and women. It helps flex the anus, and (in males) stabilize the erect penis or (in females) tense the vagina. Kegel exercises (also known as pelvic...
Cremaster muscle Layers of the scrotum Anatomical structure
The cremaster muscle is a muscle that covers the testis. Its function is to raise and lower the scrotum in order to regulate the temperature of the testis and promote spermatogenesis. In a cool environment the cremaster draws the testis closer...
Sternocleidomastoid muscle Anatomical structure
In human anatomy, the sternocleidomastoid (pronounced ) muscle, also known as sternomastoid and commonly abbreviated as SCM, is a paired muscle in the superficial layers of the anterior portion of the neck. It acts to flex and rotate the head. It...
Deltoid muscle Anatomical structure
In human anatomy, the deltoid muscle is the muscle forming the rounded contour of the shoulder. It was previously called the Deltoideus and the name is still used by some anatomists. It is called so because it is in the shape of the Greek letter...
Bulbospongiosus muscle Anatomical structure
Bulbospongiosus (bulbocavernous in older texts) is one of the superficial muscle of the perineum. It has a slightly different origin, insertion and function in males and females. In males, it covers the bulb of the penis. In females, it covers the...
Gluteus maximus muscle Anatomical structure
'''The gluteus maximus is the largest and most superficial of the three gluteal muscles. It makes up a large portion of the shape and appearance of the buttocks. It is a broad and thick fleshy mass of a quadrilateral shape, and forms the prominence...
Gluteus medius muscle Anatomical structure
The gluteus medius, one of the three gluteal muscles, is a broad, thick, radiating muscle, situated on the outer surface of the pelvis. Its posterior third is covered by the gluteus maximus, its anterior two-thirds by the gluteal aponeurosis,...
Gluteus minimus muscle Posterior view of several hip muscles Anatomical structure
The gluteus minimus, the smallest of the three gluteal muscles, is situated immediately beneath the gluteus medius. It is fan-shaped, arising from the outer surface of the ilium, between the anterior and inferior gluteal lines, and behind, from...
Superior oblique muscle Anatomical structure
For the abdominal muscle see: External oblique muscle The superior oblique muscle, or obliquus oculi superior, is a fusiform muscle in the upper, medial side of the orbit whose primary action is intorsion and whose secondary actions are to abduct ...
Levator scapulae muscle Anatomical structure
The levator scapulae is situated at the back and side of the neck. It arises by tendinous slips from the transverse processes of the atlas and axis and from the posterior tubercles of the transverse processes of the third and fourth cervical...