Muscles

Origin: Maxillary bone and mandible

Insertion: blends into fibers of the orbicularis oris

innervation: facial nerve (CN VII)

Function: Compresses cheeks

Origin: Maxillary bone and mandible

Insertion: Lips

Innervation: facial nerve (CN VII)

Function: Compresses, purses lips

Origin: Medial margin of orbit

Insertion: Skin around eyelids

innervation: Facial Nerve (CN VII)

Function: Closes eyes

Origin: Zygomatic Arch

Insertion: Lateral surface of mandible

Innervation: Trigeminal nerve (CN V)

Function: Elevates mandible

Origin: Along Temporal lines of skull

Insertion: Coronoid process of mandible

Innervation: trigeminal nerve (CN V)

Function: elevates mandible

Origin: Inferior processes of sphenoid

Insertion: medial surface of mandible

Innervation: Trigeminal Nerve (CN V)

Function: Elevate, protract, and/or move mandible to either side

Origin: From cartilage of second rib to acromion of scapula

Insertion: Mandible and skin of cheek

Innervation: Facial Nerve (CN VII)

Function: Tenses skin of neck, depresses mandible

Origin: Superior margins of sternum and clavicle

Insertion: Mastoid region of skull

Innervation: Accessory nerve (CN XI) and cervical spinal nerves (C2-C3) of cervical plexus

Function: Both sides together flex the neck; alone one side bends head toward shoulder and turns face to opposite side

Origin: Inferior border of each rib

Insertion: superior border of next rib

Innervation: Intercostal nerves

Function: Elevates ribs

Origin: Superior border of each rib

Insertion: Interior border of the preceding rib

Innervation: Intercostal nerves

Function: Depress ribs

Origin: lower eight ribs

Insertion: Linea Alba and iliac Crest

Innervation: Intercostal, iliohypogastric, and ilioinguinal nevers

Function: Compresses abdomen, depresses ribs, flexes or laterally flexes vertebral column.

Origin: Iliac crest and adjacent connective tissues

Insertion: Lower ribs, xiphoid of sternum, and linea alba

Innervation Intercostal, iliohypogastric and ilioinguinal nerves

Function: Compress abdomen, depresses ribs, flexes or laterally flexes vertebral column

Origin: Cartilages of lower ribs, iliac crest, and adjacent connective tissues.

Insertion: Linea alba and pubis

Innervation: Intercostal, iliohypogastric, and ilioinguinal nerves

Function: Compresses Abdomen

Origin: Superior surface of pubis around symphysis

Insertion: inferior surface of costal cartilages (ribs 5-7) and xiphoid process

Innervation: Intercostal nerves (T7-T12)

Function: Depresses ribs, flexes vertebral column

Origin: Inferior surfaces of costal cartilages (ribs 5-7) and xiphoid process

Insertion: Superior surface of pubis around symphysis

Innervation: None that are testable

Function: Origin or insertion site of ALL of the abdominal muscles

Origin: Anterior surfaces of ribs 3-5

Insertion: Coracoid process of scapula

Innervation: Medial pectoral nerve (C8-T1)

Function: Depresses and protracts shoulder; rotates scapula laterally (Downward); elevates ribs if scapula is stationary

Origin: Spinous process of lower cervical and upper thoracic vertebrae

Insertion: Vertebral border of scapula

Innervation: Dorsal scapular nerve (C5)

Function: Adducts and rotates scapula laterally (Downward)

Origin: Anterior and superior margins of ribs 1-9

Insertion: Anterior surface of vertebral border of scapula

Innervation: Long thoracic Nerve (C5-C6)

Function: Protracts shoulder, abducts and medially rotates scapula (upward)

Origin: Occipital bone and spinous processes of thoracic vertebrae

Insertion: Clavicle and scapula (Acromion and scapular spine)

Innervation: Accessory Nerve (CN XI) and cervical spinal nerves (C3-C4)

Function: Depends on active region and state of other muscles; may elevate, adduct, depress, or rotate scapula and/or elevate clavicle; can also extend or hyper-extend neck

Origin: Coracoid Process

Insertion: Medial margin of shaft of humerus

Innervation: Musculocutaneous Nerve (C5-C7)

Function: Adduction and flexion at shoulder

Origin: Clavicle and scapula (Acromion and adjacent scapular spine)

Insertion: deltoid tuberosity of humerus

Innervation: Axillary nerve (C5-C6)

Function: Abduction at shoulder

Origin: Spinous processes of lower thoracic vertebrae, ribs, and lumbar vertebrae

Insertion: Intertubercular groove of humerus

Innervation: Thoracodorsal nerve (C6-C8)

Function: Extension, adduction, and medial rotation at shoulder

Origin: cartilages of ribs 2-6, body of sternum, and clavicle

Insertion: Greater tubercle of humerus

Innervation: Pectoral Nerves (C5-T1)

Function: Flexion, adduction , and medial rotation at shoulder

Origin: Supraspinous fossa of scapula

Insertion: Greater tubercle of humerus

Innervation: Suprascapular nerve (C5)

Function: Abduction at shoulder

Origin: Infraspinous fossa of scapula

Insertion: Greater tubercle of humerus

Innervation: Suprascapular nerve (C5-C6)

Function: Lateral rotation at shoulder

Origin: Subscapular Fossa of scapula

Insertion: Lesser tubercle of humerus

Innervation: Subscapular nerves (C5-C6)

Function: Medial rotation at shoulder