Muscle identification and actions

Frontalis

Elevates Eyebrows, Wrinkles forehead

Orbicularis oculi

Close eye for blinking

Orbicularis oris

closes mouth, shapes lips for kissing

Buccinator

Sucking, swallowing, keeps food in contact with teeth while chewing

Zygomaticus 

Elevates corners of mouth for smiling 

Masseter

Elevates mandible for chewing

temporalis

located on each side of the head by the temples

Sternocleidomastoid 

Flex Neck 

Trapezius

Extends neck, Also elevates, depresses, adducts the scapula

External Intercostal

Elevates rib cage during inspiration

Internal intercostal

Depress rib cages during forced expiration (closer to the ribs)

Diaphragm

Respiration ( inhale and exhale)

External oblique

Lateral flexion and rotation of trunk

Rectus abdominis

Flexion and rotation of trunk

Serrates Anterior

Protracts scapula for pushing

deltoid 

Abducts the arm 

Pectoral’s Major

Flexes and adducts the arm

Latissimus dorsi

Extends and adducts the arm

Biceps Brachii

Flexes forarm

Triceps Brachii

Extends forarm

Flexor carpi

Flexes hand and Wrist

Extensor Carpi

Extends hand and Wrist 

Flexor Digitorum

Flexes Fingers

Extensor digitorum

Extends fingers

Gluteus maximus

Extends thigh (butt)

Gracilis, Adductor longus, pectinous

Adducts thigh

Quadriceps femurs group 

Extends the leg and flexes the thigh 

Sartorius

Flexes the leg and thigh

Gastrocnemius

plantar flexes foot

Tibialis Anterior

Dorsiflexes foot