Muscles of the body (uses & location)

Frontalis

This is a facial muscle that raises the eyebrows in surprise and produces wrinkles in the forehead

Quadratus labii inferioris

This is a facial muscle that extends from the lower lip and pulls the lip down in irony.

Orbicularis oculi

This is a facial muscle that encircles the eye and allows us to close, squint, and wink our eyes

Quadratus labii superioris

This is a facial muscle that extends from the eye to the upper lip and allows the face to show emotions of sadness, disdain, and contempt.

Orbicularis oris

This is a facial muscle that is also known as the "kissing muscle" because it encircles and protrudes the lips.

Mentalis

"muscle of the chin"

triangularis

This is a triangular muscle at the lateral end of the lips that depresses the corner of the mouth and is where we drool

Buccinator

This is a deep muscle of the cheek known as the whistling/blowing muscle because it flattens the cheek.

Zygomaticus

This is a muscle responsible for raising the corners of the mouth upward that is why it is also referred to as the 'smiling muscle'

Masseter

This is the agonist muscle for mastication and it raises the mandible

Temporalis

This is a fan-shaped muscle of the temporal bone and the synergist muscle for mastication. It also raises and retracts the mandible

sternocleidomastoid

This is a thick muscle running from the sternum and clavicle to the mastoid and occipital bone; flexes head forward and downward.

platysma

This is the thinnest muscle of the body and covers the anterolateral neck, it also sags the mouth

Trapezius

This is the large triangular muscle of the upper back that allows us to shrug our shoulder by raising the scapula and hyperextension or the extension of the head backwards.

Intercostal muscles

These are deep muscles found in the ribs

pectoralis major

This is a large fan-shaped muscle covering the upper part of the chest, it forms the anterior wall of the axilla. It also acts to adduct and flex the arm.

External intercostals

This muscle raises the rib cage for breathing in/ inhalation

Internal intercostals

This muscle depresses the rib cage for breathing out/ exhalation

Obliquus externus

These are paired superficial muscles that make up the lateral abdominal walls; it flexes the vertebral column and bend it laterally

Transversus abdominis

This is the deepest muscle of the abdominal wall and compresses the abdominal contents. This muscle is flexed when doing the valsalva maneuver

Rectus abdominis

These are superficial paired, strap-like muscles running from the rib cage to the pubic bone; it flexes the vertebral column

Obliquus internus

This lies deep to the external oblique and flexes the vertebral column and bends it laterally

Erector Spinae

These are deep muscles that pull the ribs and vertebrae backward to maintain erectness

latissimus dorsi

These are large muscles in the back that covers the lumbar area of the spine and extends, adduct and rotates the arm medially. They also draw the shoulder downward and backward.

Deltoideus

This is the fleshy, triangular, principal muscle of the shoulder, the prime mover of arm adduction and is the one of the favorite sites for injection.

Biceps brachii

This is the large muscle on the anterior surface of the upper arm that is the prime mover for flexion and rolls the radius outward to supinate the hand.

Brachioradialis

This is the most superficial muscle on the lateral side of the forearm; flexes the forearm

Triceps brachii

The muscle at the entire back surface of the upper arm, often called "boxer's muscle" because it can deliver a straight knock-out punch

Brachialis

Deep muscle underneath the biceps brachii; flexes the forearm

Gluteus medius

This is a muscle in the lower limb that is underneath the gluteus maximus, it steadies the pelvis during walking and is the site for gluteal intramuscular injection.

Gluteus minimus

This is a muscle in the lower limb that is the smallest of the 3 gluteal muscles that lies deep to the gluteus medius and abducts the femur and rotates it inward.

Iliopsoas

This is the prime muscle for hip flexion and keeps the body from falling backward when we are standing erect.

Gluteus maximus

These are muscles in the lower limb that forms most of the flesh of the buttocks, its function is to extend the hip when power is needed to climb stairs and to jump.

Adductor muscles

These forms the muscle mass at the medial side of each side, it also adducts or presses the thighs together.

Sartorius

Thin, strap-like, and the most superficial muscle of the thigh, it is also known as the "tailor's muscle" because it brings about the cross-legged position.

Vastus intermedius

This is a muscle that is deep to the rectus femoris

vastus lateralis

This is a muscle that is part of the quadriceps group and is the site for intramuscular injection.

Vastus medialis

This is a muscle that is part of the quadriceps group that acts to extend the knee powerfully.

rectus femoris

This is a muscle that is part of the quadriceps group that crosses the hip and knee joint, and helps flexes the knee.

Biceps femoris

This is a muscle in the posterior portion of the thigh that helps in the movement of both the hip and knee joints.

Semimembranosus

This is a muscle in the posterior portion of the thigh that flexes the knee and extends the hips

Semitendinosus

This muscle belongs to the hamstring group and is named due to it having a long tendon of insertion

Gastrocnemius

This is a 2 bellied muscle that forms the curved calf of the posterior leg, the agonist muscle for plantarflexion of the foot and is also known as the "toe-dancer's muscle"

Tibialis anterior

Superficial muscle of the anterior leg and acts to dorsiflex and invert the foot.

Peroneus muscle

This is a muscle in the lower leg that plantarflexes and everts the foot.

Soleus muscle

A muscle in the lower leg that is deep to the gastrocnemius and also helps with the plantarflexion of the feet.

Achilles tendon

This is the strongest tendon in the body

Sternocleidomastoid

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Temporalis

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Pectoralis major

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Trapezius

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Buccinator

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Quadratus labii superioris

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Masseter

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Frontalis

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Zygomaticus

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Orbicularis oculi

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Platysma

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Quadratus labii inferioris

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Rectus abdominis

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Orbicularis oris

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Obliquus externus

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Triangularis

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Mentalis

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Obliquus internus

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Transversus abdominis

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latissimus dorsi

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Erector spinae

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Spinalis

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iliocostalis

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longissimus

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deltoideus

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brachialis

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biceps brachii

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Triceps brachii

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brachioradialis

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Gluteus medius

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Iliopsoas

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gluteus maximus

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sartorius

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rectus femoris

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vastus intermedius

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vastus lateralis

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vastus medialis

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semimembranosus

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Semitendinosus

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biceps femoris

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Tibialis anterior

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gastrocnemius

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peroneus longus

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