muscle origins/insertions/actions

what is the origin of the frontalis?

epicranial aponeurosis

what is the insertion of the frontalis?

skin of the eyebrow

what is the action of the frontalis?

to raise the eyebrows

what is the origin of the occipitalis?

the occipital and temporal bone

what is the insertion of the occipitalis?

epicranial aponeurosis

what is the action of the occipitalis?

pulls the scalp posterior

what is the origin of the orbicularis oculi?

frontal bone

what is the insertion of the orbicularis oculi?

tissue of the eyelid

what is the action of the orbicularis oculi?

close the eyelid

what is the origin of the zygomaticus major?

zygomatic bone

what is the insertion of the zygomaticus major?

modiolus

what is the action of the zygomaticus major?

smiling

what is the origin of the zygomaticus minor?

zygomatic bone

what is the insertion of the zygomaticus minor?

the skin of the upper lip

what is the origin of the zygomaticus minor?

smiling

what is the origin of the orbicularis oris?

maxilla + mandible

what is the insertion of the orbicularis oris?

skin of the lips

what is the action of the orbicularis oris?

closes lips

what is the origin of the buccinator?

maxilla + mandible

what is the insertion of the buccinator?

modiulus

what is the action of the buccinator?

compress the cheeks

what is the origin of the masseter?

maxillary process of zygomatic bone

what is the insertion of the masseter?

angle of the mandible

what is the action of the masseter?

elevates mandible

what is the origin of the temporalis?

temporal fossa

what is the insertion of the temporalis?

coronoid process of mandible

what is the action of the temporalis?

elevates mandible

what is the origin of the platysma?

fascia of the deltoid

what is the insertion of the platysma?

muscles of the lower lip

what is the action of the platysma?

lowers the jaw

what is the origin of the sternocleidmastoid?

sternal head of the manubrium sterni

what is the insertion of the sternocleidomastoid?

mastoid process of the temporal bone

what is the action of the sternocleidomastoid?

rotation of the head

what is the origin of the pectoralis major?

clavicular head of the clavicle

what is the insertion of the pectoralis major?

intertubercular sulcus of the humerus

what is the action of the pectoralis major?

arm adduction

what is the origin of the serratus anterior muscle?

1st to 9th rib

what is the insertion of the serratus anterior muscle

anterior surface of the medial border of the scapula

what is the action of the serratus anterior muscle?

rotates scapula

what is the origin of the deltoid muscle?

spine of the scapula

what is the insertion of the deltoid muscle?

deltoid tuberosity of the humerous

what is the action of the deltoid muscle?

lifting the arm in all directions

what is the origin of the pectoralis minor

anterior surface of ribs 3-5

what is the insertion of the pectoralis minor?

coracoid process of the scapula

what is the action of the pectoralis minor?

stabilize the scapula

what is the origin of the external intercostals?

inferior border of the rib above

what is the insertion of the external intercostals?

superior border of rib below

what is the action of the external intercostals?

elevate the ribs

what is the origin of the internal intercostals?

superior border of rib below

what is the insertion of the internal intercostals?

inferior border of rib above

what is the action of the internal intercostals

depress the ribs

what is the origin of the diaphragm?

xiphoid process of the sternum

what is the insertion of the diaphragm?

central tendon

what is the action of the diaphragm?

primary muscle of breathing

what is the origin of the rectus abdominis?

pubic symphysis

what is the insertion of the rectus abdominis?

xiphoid process of the sternum

what is the action of the rectus abdominis?

expiration (breathing)

what is the origin of the external obliques?

anterior surface of lower eight ribs

what is the insertion of the external obliques?

pubic crest

what is the action of the external obliques?

compresses abdominal wall

what is the origin of the internal obliques?

lumbar fascia

what is the insertion of the internal obliques?

pubic crest

what is the action of the internal obliques?

trunk flexion

what is the origin of the transversus abdominis?

iliac crest

what is the insertion of the transversus abdominis?

pubic crest

what is the action of the transversus abdominis?

compress abdominal contents

what is the origin of the trapezius?

occipital bone

what is the insertion of the trapezius?

spinous process of scapula

what is the action of the trapezius?

extends head

what is the origin of the latissimus dorsi?

iliac crest

what is the insertion of the latissimus dorsi?

floor of intertubercular sulcus of humerus

what is the action of the latissimus dorsi?

primer mover of arm extension

what is the origin of the infraspinatus (rotator cuff)

infraspinous fossa of scapula

what is the insertion of the infraspinatus?

greater tubercle of humerus

what is the action of the infraspinatus?

lateral rotation of arm

what is the origin of the teres minor (rotator cuff)

lateral margin of posterior scapula

what is the insertion of the teres minor (rotator cuff)

greater tubercle of humerus

what is the action of the teres minor?

same as infraspinatus - lateral rotation of arm

what is the origin of the sprasinatus?

supraspinous fossa of scapula

what is the insertion of the supraspinatus?

greater tubercle of humerus

what is the action of the supraspinatus?

initiates abduction of arm

what is the origin of the teres major?

posterior surface at inferior angle of scapula

what is the insertion of the teres major?

intertubercular sulcus of humerus

what is the action of the teres major?

extends, medially rotates, and adducts arm

what is the origin of the rhomboids major and minor?

spinous processes of C₇ and T₁-T₅

what is the insertion of the rhomboids major and minor?

medial border of scapula

what is the action of the rhomboids major and minor?

stabilize scapulae

what is the origin of the triceps brachii?

inferior margin of glenoid cavity

what is the insertion of the triceps brachii?

olecranon of ulna

what is the action of the triceps brachii?

powerful forearm extensor

what is the origin of the biceps brachii?

coracoid process of scapul

what is the insertion of the biceps brachii?

radial tuberosity

what is the action of the biceps brachii?

power flexion and supination of forearm

what is the origin of the brachioradialis?

lateral ridge at distal end of humerus

what is the insertion of the brachioradialis?

base of radial styloid process

what is the action of the brachioradialis?

synergist in forearm flexion

what is the origin of the brachialis?

distal end of anterior humerus

what is the insertion of the brachialis?

coronoid process of ulna

what is the action of the brachialis?

flexor of forearm

what is the origin of the pronator teres?

medial epicondyle of humerus