Muscles (OIA)

Muscle fibers, muscles (+ their origin, insertion, and actions)

Orbicularis oculi origin

orbit (eye socket)

Orbicularis oculi insertion

Skin of the eylids

Oricularis oculi action

Close eyelids

Orbicularis oris origin

Alveolar process of maxilla and mandible

Orbicularis oris insertion

Skin of the lips

Orbicularis oris action

Close lips/purse lips

Zygomaticus minor & major origin

Zygomatic bone

Zygomaticus minor & major insertion

Muscles of the upper lip

Zygomaticus minor & major action

Elevate the corner of the mouth

Depressor anguli oris origin

Body of the mandible

Depressor anguli oris insertion

Skin at the corner (angle) of mouth

Depressor anguli oris action

depress lower lip (frown)

Depressor labii inferioris origin

Body of the mandible

Depressor labii inferioris insertion

Skin of lower lip

Depressor labii inferioris action

depress lower lip

Masseter origin

Zygomatic arch

Masseter insertion

Angle of the mandible

Masseter action

Elevation of the mandible

Temporalis origin

Temporal lines and parietal bone

Temporalis insertion

Coronoid process of the mandible

Temporalis action

Elevation of the mandible

Genioglossus origin

Medial surface of the mandible

Genioglossus insertion

Tongue

Genioglossus action

Protract tongue (stick tongue out)

Sternocleidomastoid origin

Sternum and clavicle

Sternocleidomastoid insertion

Mastoid process of the temporal bone

Sternocleidomastoid action

Flexion of neck

Lateral flexion of neck

Rotation of neck

Scalenes (anterior, middle, and posterior) origin

Transverse process of cervical vertebrae

Scalenes (anterior, middle, and posterior) insertion

1st or 2nd rib

Scalenes (anterior, middle, and posterior) action

Elevate ribs

Flexion of neck

Rectus abdominis origin

Pubic bone (pubis)

Rectus abdominis insertion

Xiphoid process

Ribs

Rectus abdominis action

Flexion of torso

External abdominal obliques origin

Lower ribs

External abdominal obliques insertion

iliac crest

aponeurosis of the external abdominal obliques

External abdominal obliques action

Flexion of torso

Rotation of torso

Lateral flexion of torso

Internal abdominal obliques origin

Iliac crest

Internal abdominal obliques insertion

Lower ribs

Internal abdominal obliques action

Rotation of torso

Flexion of torso

Lateral rotation of torso

Rhomboid minor & major origin

Spinous process of the thoracic vertebrae

Rhomboid minor & major insertion

Medial border of scapula

Rhomboid minor & major action

Adduction of scapula

Elevation of scapula

Pectoralis minor origin

Ribs

Pectoralis minor insertion

Coracoid process of the scapula