Muscle I,O,A written

Origin of Frontalis?

Frontal bone

Insertion of Frontalis?

Epicranial aponeurosis

Name one action of Frontalis.

Elevates eyebrows

Origin of Orbicularis oculi?

Frontal bone and maxilla

Insertion of Orbicularis oculi?

Skin of the eyelids

Name one action of Orbicularis oculi.

Closes eyes

Origin of Orbicularis oris?

Facial muscles of mouth

Insertion of Orbicularis oris?

Skin of lips

Name one action of Orbicularis oris.

Closes mouth

Origin of Zygomaticus (major & minor)?

Zygomatic bone

Insertion of Zygomaticus (major & minor)?

Corner of the mouth

Name one action of Zygomaticus (major & minor).

Elevates corners of mouth

Origin of Depressor anguli oris?

Mandible

Insertion of Depressor anguli oris?

Corner of the mouth

Name one action of Depressor anguli oris.

lowers corners of mouth

Origin of Buccinator?

Maxilla and mandible

Insertion of Buccinator?

Orbicularis oris

Name one action of Buccinator.

Tenses cheeks

Origin of Platysma?

pectoralis and deltoid

Insertion of Platysma?

Mandible

Name one action of Platysma.

Tenses skin of neck

Origin of Masseter?

Zygomatic arch

Insertion of Masseter?

Mandible

Name one action of Masseter.

Elevates jaw

Origin of Temporalis?

temporal bone

Insertion of Temporalis?

Coronoid process of mandible

Name one action of Temporalis.

Elevates mandible

Origin of Sternocleidomastoid?

Manubrium of sternum, clavicle sternal end

Insertion of Sternocleidomastoid?

Mastoid process of temporal bone

Name one action of Sternocleidomastoid.

Extends and flexes neck

Origin of Diaphragm?

Xiphoid process, ribs, vertebrae

Insertion of Diaphragm?

Central tendon

Name one action of Diaphragm.

increases volume of thoracic cavity

Origin of External intercostalis?

Lower rib border

Insertion of External intercostalis?

Upper border rib below

Name one action of External intercostalis.

Expands rib cage

Origin of Internal intercostalis?

Inner rib surface

Insertion of Internal intercostalis?

Upper border of rib below

Name one action of Internal intercostalis.

Collapses rib cage

Origin of Iliocostalis?

iliac crest

Insertion of Iliocostalis?

Ribs above

Name one action of Iliocostalis.

laterally flexes vertebral column

Origin of Longissimus?

transverse processes of vertebrae and ribs

Insertion of Longissimus?

Ribs and transverse processes of vertebrae above

Name one action of Longissimus.

laterally flexes vertebral column

Origin of Spinalis?

Spinous processes of vertebrae

Insertion of Spinalis?

Spinous processes of vertebrae above

Name one action of Spinalis.

Extends vertebral column

Origin of External abdominal oblique?

middle ribs

Insertion of External abdominal oblique?

Iliac crest and Linea alba

Name one action of External abdominal oblique.

Compresses abdomen

Origin of Internal abdominal oblique?

iliac crest

Insertion of Internal abdominal oblique?

Inferior ribs and linea alba

Name one action of Internal abdominal oblique.

Compresses abdomen

Origin of Transversus abdominis?

iliac crest and inferior ribs

Insertion of Transversus abdominis?

Linea alba and pubis

Name one action of Transversus abdominis.

Compresses abdomen

Origin of Rectus abdominis?

Pubis

Insertion of Rectus abdominis?

Xiphoid process of sternum

Name one action of Rectus abdominis.

Flexes spine

Origin of Trapezius?

Occipital bone and thoracic vertebrae

Insertion of Trapezius?

Acromion and spine of scapula

Name one action of Trapezius.

retracts scapula

Origin of Rhomboid major?

Spinous processes of thoracic vertebrae

Insertion of Rhomboid major?

Medial border of scapula

Name one action of Rhomboid major.

Retracts scapula

Origin of Rhomboid minor?

Spinous processes of thoracic and cervical vertebrae

Insertion of Rhomboid minor?

Medial border of scapula

Name one action of Rhomboid minor.

Retracts scapula

Origin of Pectoralis minor?

upper ribs

Insertion of Pectoralis minor?

Coracoid process of scapula

Name one action of Pectoralis minor.

protracts scapula

Origin of Serratus anterior?

Upper rribs

Insertion of Serratus anterior?

Medial border of scapula

Name one action of Serratus anterior.

Protracts scapula

Origin of Pectoralis major?

clavicle and sternum

Insertion of Pectoralis major?

Greater tubercle of humerus

Name one action of Pectoralis major.

medial rotation of glenohumeral joint

Origin of Deltoid?

Acromion of scapula and clavicle

Insertion of Deltoid?

Deltoid tuberosity of humerus

Name one action of Deltoid.

flexes and extends glenohumeral joint

Origin of Latissimus dorsi?

spinous processes of thoracic and lumbar vertebrae

Insertion of Latissimus dorsi?

intertubercular groove of humerus

Name one action of Latissimus dorsi.

medially rotate glenohumeral joint

Origin of Teres major?

Inferior angle of scapula

Insertion of Teres major?

intertubercular groove of humerus

Name one action of Teres major.

medial rotation of glenohumeral joint

Origin of Subscapularis?

Subscapular fossa

Insertion of Subscapularis?

Lesser tubercle of humerus

Name one action of Subscapularis.

Medially rotates glenohumeral joint

Origin of Teres minor?

Lateral border of scapula

Insertion of Teres minor?

Greater tubercle of humerus

Name one action of Teres minor.

Laterally rotates glenohumeral joint

Origin of Infraspinatus?

Infraspinous fossa

Insertion of Infraspinatus?

Greater tubercle of humerus

Name one action of Infraspinatus.

Laterally rotates glenohumeral joint

Origin of Supraspinatus?

Supraspinous fossa

Insertion of Supraspinatus?

Greater tubercle of humerus

Name one action of Supraspinatus.

Abducts glenohumeral joint

Origin of Biceps brachii?

scapula