Axial Muscles - Actions

Epicranius, Frontalis

Moves Scalp and Eyebrows

Epicranius, Occipitalis

Retracts Scalp

Orbicularis Oculi

Closes Eye, Blinking

Orbicularis Oris

Compress and Purse Lips

Zygomaticus Major/Minor

Elevates Corner of Mouth

Platysma

Tenses Skin of Neck

Temporalis

Elevates and Retracts Mandible

Masseter

Elevates and Protracts Mandible

Sternocleidomastoid

Flexes Neck, Rotates Head to Opposite Side

Sternohyoid

Depresses Hyoid

Erector Spinae, Iliocostals

Extends Vertebral Column, Laterally Flexes Spine

Erector Spinae, Longissimus

Extends Vertebral Column, Rotates Head, Laterally Flexes Spine

Erector Spinae, Spinalis

Extends Vertebral Column, Laterally Flexes Vertebral Column

Diaphragm

Contracts and Flattens during Inspiration

External Intercostal

Elevates Ribs during Inspiration

Internal Intercostal

Depresses Ribs during Expiration

External Oblique

Flex Spine, Compress Abdominal Wall, Laterally Flex Spine, Rotate Spine to Same Side

Internal Oblique 

Flex Spine, Compress Abdominal Wall, Laterally Flex Spine, Rotates Spine to Opposite Side

Rectus Abdominis

Flex Spine, Compress Abdominal Wall

Transversus Abdominis

Flex Spine, Compress Abdominal Wall, Laterally Flex Spine

Pectoralis Major

Flexes Arm, Adducts and Medially Rotates Arm

Pectoralis Minor

Protract and Depress Scapula

Serratus Anterior

Rotate Scapula Superiorly, Stabilize Scapula

Trapezius

Elevate Scapula, Rotate Scapula Superiorly, Retract Scapula, Depress Scapula

Levator Scapulae

Elevate Scapula, Rotate Scapula Superiorly

Rhomboid Major/Minor

Elevates and Retracts Scapula, Rotates Scapula Inferiorly 

Latissimus Dorsi

Extends Arm, Adducts Arm, Medially Rotates Arm

Deltoid

Flex and Medially Rotates Arm, Adducts Arm, Extends and Laterally Rotates Arm

Subscapularis

Medially Rotates Arm

Supraspinatus

Abducts Arm

Infraspinatus

Adducts and Laterally Rotates Arm

Teres Major

Extends, Adducts, and Medially Rotates Arm 

Teres Minor

Adducts and Laterally Rotates Arm