MSAK 1 - Muscles

Occipitalis

Origin: Lateral 2/3 of Highest/Supreme Nuchal Line & and mastoid process
Insertion: Galea Aponeurotica
Action: raises eyebrows, Scrunches scalp back
Nerve: Facial CNVII

Frontalis

Origin: Galea Aponeurotica
Insertion: Fascia & Skin superior to eye and nose
Action: raises eyebrows, scrunches scalp back
Nerve: Facial CNVII

Temporalis

Origin: Temporal fossa
Insertion: coronoid process & anterior ramus of mandible
Action: elevates and retracts mandible at temporomandibular joint
Nerve: trigeminal V

Masseter

Origin: Zygomatic arch
Insertion: Angle and ramus of mandible
Action: elevates and protracts mandible at temporomandibular joint
Nerve: Trigeminal V

Zygomaticus Major

Origin: zygomatic bone
Insertion: angle of mouth
Action: mouth corner up
Nerve: facial VII

Risorius

Origin: fascia over parotid gland superior to masseter
Insertion: angle of mouth
Action: mouth angle lateral
Nerve: facial VII

Buccinator

Origin: Maxilla & mandible (outer surfaces of alveolar processes), TMJ
Insertion: Lips
Action: compression of cheeks against the teeth
Nerve: facial VII

Platysma

Origin: Subcutaneous fascia of superior chest
Insertion: mandible & subcuntaneous fascia of lower face
Action: moves skin of superior chest & neck, depresses and pulls lower lip laterally (side & down)
Nerve: Facial VII

Sternocleidomastoid

Origin: manubrium of sternum & medial 1/3 of clavicle
Insertion: mastoid process of temporal bone and lateral ½ spr nuchal line
Action: lateral flexion of head (atlanto-occipital joint); contralateral rtn of lower neck (spinal jnts); extension of upper neck (atlanto-occipital jnt); elevation of sternum and clavicle (forced inhalation)
Nerve: spinal accessory nerve XI

Levator Scapulae

Origin:
Insertion:
Action:
Nerve:

Trapezius

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Action:
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Rhomboid

Origin:
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Deltoid

Origin:
Insertion:
Action:
Nerve:

Subclavicle

Pectoralis Major

Pectoralis Minor

Teres Major

Superspinatus

Infraspinatus

Teres Minor

Subscapularis

Biceps Brachii

Origin: short head coracoid process; long head supraglenoid tubercle

Triceps Brachii

Latissimus Dorsi

Anterior Serratus

Biceps Femoris

Semitendonosus

Semimembranosus