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Orbicularis Oculi
Muscle of facial
Muscle closes the eye

Orbicularis Oris
Muscle of facial
Muscle closes the mouth and protrudes the lips

Buccinator
Muscle of facial
Muscle pulls in the cheeks against the teeth

Platysma
Muscle of facial
Muscle pulls the corner of mouth down and tenses the skin of the neck

Temporalis
Muscle of mastication

Masseter (Origin, Insertion, Action)
Muscle of Mastication
Origin: zygomatic bone
Insertion: mandible
Action: elevates mandible

Sternocleidomastoid (Origin, Insertion, Action)
Located on lateral & anterior portion of the neck
Origin: sternum, clavicle
Insertion: mastoid process of temporal bone
Action:
Bilateral contraction: cervical flexion
Unilateral contraction: lateral flexion to its own side and rotation of head & neck to opposite side

Scalene
Group of three muscles
Anterior scalene
Middle scalene
Posterior scalene
Located between sternocleidomastoid muscle & anterior portion of trapezius

Iliocostalis
Muscle of vertebral column

Longissimus
Muscle of vertebral column

Spinalis
Muscle of vertebral column

Diaphragm (Origin, Insertion, Action)
Muscle of respiration
Origin: sternum
Insertion: central tendon
Action: contract when inhale (increases thoracic volume, decreases pressure)

Internal Intercostal

External Intercostal

Rectus Abdominis (Origin, Insertion, Action)
Origin: Pelvic bone
Insertion: sternum (xiphoid process)
Action: trunk flexion, compression of abdomen

External Oblique (Origin, Insertion, Action)
Origin: ribs
Insertion: pelvic bone
Action: bilateral trunk flexion

Internal Oblique (Origin, Insertion, Action)
Origin: pelvic bone
Insertion: linea alba, pubic crest,
Action: bilaterally trunk flexion

Transversus Abdominis
Deeper than Internal Oblique
Action: Compression of abdomen

Linea Alba
Connective tissue (white line) on the anterior wall that divides the rectus abdominis muscle


Abdominals Group
REIT
Rectus abdominus
External oblique
Internal oblique
Transverse abdominus