Adductor Longus is a skeletal muscle located in the thigh. It is one of the adductor muscles of the hip. Its main functions are to adduct (pull) and laterally rotate the femur and it is innervated by the obturator nerver. It forms the medial wall of the femoral triangle.
Biceps Brachii, also known simply as Biceps, is a two-headed muscle (the short head and the long head) located on the upper arm. Both heads are located on the scapula and join together to form a single muscle. This muscle controls three joints: the elbow, shoulder, and the proximal radioulnar joint (allows the palm to be turned upwards).
Biceps Femoris is a muscle on the back of the thigh and is considered part of the hamstring muscle group. It is a two-headed muscle, consisting of the long head (caput longum) and the short head (caput breve). The main function of both the heads of the biceps femoris is to assist in knee flexion.
Brachioradialis is a muscle located in the forearm. Its main function is to flex the forearm at the elbow.
Deltoid, also once known as the Deltoideus, is the muscle that forms the rounded contour of the shoulder.
Extensor Carpi Radialis refers to two different muscles:
- Extensor Capri Radialis Brevis is shorter and thicker than the extensor carpi radialis longus. It is located on the forearm and is one of the five main muscles that control movements at the wrist. Its main function is to act as an abductor (push) of the hand at the wrist joint.
- Extensor Carpi Radialis Longus is longer and shorter than the extensor carpi radialis brevis. It is located on the forearm and is one of the five main muscles that control movements at the wrist. Its main function is to act as an abductor (push) of the hand at the wrist joint.
Extensor Carpi Ulnaris is a skeletal muscle located on the side of the forearm. Its main function is to extend the wrist, but it will also extend the elbow-joint with continued extension.
Extensor Digiti Minimi is a slender muscle located in the forearm.
Extensor Digitorum is a muscle located in the posterior forearm. Its main function is to extend the fingers of the hand except for the thumb.
Extensor Digitorum Brevis is a muscle located on the upper surface of the foot. Its main function is to help extend the three middle toes.
Extensor Hallucis Brevis is a muscle located on the top of the foot. Its main function is to help extend the big toe.
External Oblique is the largest and outermost of the three flat abdomen muscles. It is apart of the human core and is located in the abdominal region of your body (stomach area). Its main function is to pull the chest downwards and compress the abdominal cavity, which increases the intra-abdominal pressure.
Flexor Capri Radialis is a muscle located in the forearm. Its main function is to help flex and extend the hand.
Flexor Digitorum Superficialis is a muscle located in the front of the forearm. Its main function is to help in the extension of the fingers at the proximal interphalangeal joints.
Gastrocnemius is a muscle located in the back part of the lower leg and is a major part of the calf. It runs from its two heads just above the knee to the heel, and is involved in standing walking, running, and jumping. Its main functions are to flex the foot at the ankle joint and to flex the leg at the knee joint.
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. Its main function is to maintain the spinal trunk in the erect posture. It is able to do this, unlike most animals, because humans have a larger size muscle, which is a common characteristic feature of the muscular system in humans.
Gluteus Medius is one of the three gluteal muscles. It is a broad, thick, radiating muscle, situated on the outer surface of the pelvis. Its main function is to retract the thigh, which allows the body to support itself on one leg.
Gracilis is the most superficial muscle on the side of the thigh. Its main functions are to adduct and flex the hip as above, and also aids in flexing the knee.
Latissimus Dorsi, meaing broadest muscle of the back, is the larger, flat, dorso-lateral muscle on the trunk, posterior to the arm, and partly covered by the trapezius on its median dorsal region. Its main functions are to flex, extend, transverse extend, and internal rotation of the shoulder joint.
Lumbricals are intrinsic muscles in the fingers that flex the metacarpophalangeal joints and extend the interphalangeal joints.
Palmaris Longus is a small tendon between the flexor carpi radialis and the flexor carpi ulnaris. This muscle is not always present, in fact it is absent in about 14 percent of the population, but this varies bases on ethnicity. Its main functions are to flex the wrist and the hand at the forearm.
Pectineus is a flat, quadrangular muscle, situated at the anterior part of the upper and medial aspect of the thigh. Its main function is to assist in hip flexion as well as adduct and medially rotate the thigh.
Pectorals Major is a thick, fan-shaped muscle located at the chest of the body. It makes up the bulk of the chest muscles in the male and lies under the breast in the female. This muscle has four major functions, which all revolve around the movement of the should joint. The first action is flexion of the humerous, as in throwing a ball side-arm, and in lifting. Secondly, it adducts the humerus, as when flapping the arms. Thirdly, it rotates the humerus medially, as occurs with actions such as arm-wrestling. Finally, it aids in drawing in air into the lungs, such as when taking a deep breath. This muscle is also responsible for keeping the arm attached to the trunk of the body.
Peroneus Longus is a superficial muscle, located in the lateral compartment of the leg. Its main function is to evert and plantar flex the ankle.
Rectus Femoris is one of four quadriceps muscles of the human body. It is located in the middle of the front of the thigh. Its main functions are to extend the knee and to flex the hip.
Rhomboid Major is a skeletal muscle on the back that connects the scapula with the vertebrae of the spinal column. Its main function is to retract the scapula and rotate it so that the glenoid cavity can depress. It also fixes the scapula to the thoracic wall.
Sartorius is the longest muscle in the human body, which runs down the length of the thigh. Its upper portion forms the lateral border of the femoral triangle. Its main functions are to flex, abduct, and laterally rotate the hip as well as flex the knee.
Semimembranosus is the middle muscle in the back of the thigh. Its main functions are to extend the hip and to flex the knee.
Semitendinosis is one of the muscles located in the back of the thigh, making it apart of the hamstrings. Its main functions are to flex the knee and to extend the hip joint.
Serratus Anterior is a muscle that is located on the surface of the upper eight or nine ribs at the side of the chest and inserts along the entire anterior length of the medial border of the scapula. Its main function is to protract and stabilize the scapula as well as assist in upward rotation.
Soleus is a powerful muscle in the back part of the calf, which is located from just below the knee to the heel. Its main function is plantarflexion, which is the movement between the front part of the foot and the shin. This muscle is involved in standing and walking.
Sternocleidomastoid, also known as sternomastoid and commonly abbreviated as SCM, is a paired muscle in the outer layers of the anterior portion of the neck. Its main function is to flex and rotate the head.
Tensor Faciae Latae is muscle located in the thigh. Its main functions are to flex, rotate, and abduct the thigh as well as stabilize the trunk.
Teres Major is a muscle located in upper limb and is one of six scapulohumeral muscles. It is a thick but somewhat flattened muscle, innervated by the lower subscapular nerve. Its main function is to internally rotate the humerus.
Thoraco-lumbar Fascia is a deep investing membrane which covers the deep muscles of the back of the trunk. It is made up of three layers, anterior, middle, and posterior. The anterior layer is the thinnest and the posterior layer is the thickest. It contains both longitudinal and transverse fibers, and is attached laterally to the angles of the ribs.
Tibialis Anterior is a muscle located in the upper two-thirds of the lateral surface of the tibia and is apart of the cuneiform and first metatarsal bones of the foot. Its main functions are dorsiflexion, which decreases the angle between the dorsum of the foot and the leg, and inversion, which is the movement of the sole of the foot towards the median plane.
Trapezius is a large superficial muscle that extends longitudinally from the occipital bone to the lower thoracic vertebrae and laterally to the spine of the scapula (shoulder blade). Its main functions are to move the scapulae and support the arms.
Triceps is the large muscle on the back of the upper limb of many vertebrates. Its main function is to extend the elbow joint.
Vastus Lateralis is the largest part of the quadriceps femoris. It arises by a broad layer of tendons, which is attached to the upper part of the intertrochanteric line, to the anterior and inferior borders of the greater trochanter, to the lateral lip of the gluteal tuberosity, and to the upper half of the lateral lip of the linea aspera. Its main function is to extend and stabilize the knee.
Vastus Medialis, often called the 'teardrop' muscle, is a medially located muscle of the quadriceps. Its main function is to extend the legs.