Muscle OIA

ORIGIN

INSERTION

ACTION

sternum

humerus

draws the arm towards the chest

Manubrium of the sternum Manubrium

Humerus Clavicle and spine of the scapula

Draws the arm towards the chest Draws arm and shoulder toward the chest

a. Sternohyoid

Manubrium if the sternum

Anterior horn of the hyoid

b. Sternomastoid

Manubrium of the sternum

Mastoid process of the skull

c. Cleidomastoid

Mastoid region of the skull

Clavicle

Occipital bone

Clavicle

Clavicle Zygomatic arch

Humerus Outer surface of the posterior end of the mandible Ventral surface of the mandible Median ventral line (raphe) and the hyoid Thyroid cartilage Hyoid

Draws the hyoid posteriorly or raises the sternum Singly turn the head, together depress the head of the neck Elevates clavicle or turns the head Elevates clavicle or turns the head Raises the humerus Closes the lower jaw/ Elevator of the jaw Opens the jaw/depressor of the jaw Raises the floor of the mouth and brings the hyoid forward Pulls the larynx posteriorly Raises the larynx

Chest on the medial side of the humerus The spine of the scapula

Draws the are caudad and dorsad Draws the scapula dorsally

Metacromion process and nearby muscles and fascia

Draws the scapula and limb upward and forward

Metacromion process in common with the anterior trapezius

Pulls the scapula anteriorly

I.

MUSCLE Muscles of the chest

a. Pectoralis Major b. Pectoralis Primus c. Pectoralis Minor II.

The muscles of the neck and throat

d. Basioclavicularis e. Clavodeltoid f. Masseter g. Digastic h. Mylohyoid i. Sternothyroid j. Thyrohyoid III. The muscles of the upper back and shoulder and back of the neck a. Latissimus dorsi b. Posterior trapezius

c. Anterior trapezius

d. Levator scapulae ventralis or major

Occipital bone Mandible Sternum Thyroid cartilage

Lumbodorsal fascia and posterior ribs Lumbodorsal fascia and the neural spines of the thoracic vertebrae External occipital protuberance of the skull and ligament in the middorsal line Ventral surface of the skull at the suture between occipital and basisphenoid

e. Rhomboideus f.

Splenius

Middorsal ligament of the neck and succeeding neural spines Middorsal line of neck and adjacent fascia Supraspinous fossa

Vertebral border of the scapula

Acromion process Infraspinous fossa and spine Dorsal half od the axillary border of the scapula Ventral half of the axillary border of the scapula Side of the skull above the tympanic bulla

Occipital region of the skull and atlas Greater tuberosity of the humerus Humerus Humerus Humerus in common with the latissimus dorsi Greater tuberosity of the humerus Posterior end of the vertebral border on the medial side

Medial surface of the scapula

Lesser tuberosity of the humerus

n. Serratus ventralis

Ribs

o. Scalenes p. Serratus dorsalis

Transverse process A tendon from the median dorsal line of the neck Posterior margins of the vertebral ribs

Vertebral border of the scapula above the subscapularis Ribs Ribs

g. Supraspinatus h. Deltoid i. Infraspinatus j. Teres major k. Teres minor l.

Rhomboideus capitis/ Levator scapulae minor m. Subscapilaris

q. Intercostal IV.

Raises the humerus Raises the humerus Draws humerus against body and rotates it Draws humerus against body and rotates it Draws scapula craniad and rotates it Pulls the humerus towards the median ventral line Draws scapula forward, backward, or against the body Raise the ribs and bend the neck Raises the ribs craniad

Anterior margins of the succeeding vertebral ribs

Pull the ribs forward

Ilium

In the fascia

Tightens the fascia

The smaller anterior head, neural spines of adjacent vertebrae Fascia of the sacrum and part of the ilium

A tendon on the kneecap and on the fascia of the shank Third trochanter, the small projection below the great trochanter Greater trochanter

Abductor of the thigh and flexor of the shank Abducts the thigh

The muscles of the thigh

a. Tensor fasciae latae b. Biceps femoris c. Gluteus maximus

d. Gluteus medius e. Vastus lateralis f. Vastus intermedius g. Rectus femoris h. Vastus medialis

i.

Draws scapula toward vertebral column Singly turns the head, together raise the head Extends the humerus

Sartorius

Crest and anterior part of the ilium Greater trochanter Greater trochanter and surface of the femur Ilium in front of the acetabulum Femur

Inguinal ligament

Abducts the thigh

Gluteus medius

Tensor fasciae latae The tibia and the patella and the tendon which extends over the patella Tibia

Powerful extensor of the shank

Adductor of the thigh, rotator of

j.

Gracilis

k. Adductor longus and magnus l. Semitendinosus m. Semimembranosus

Pubis symphysis

Ischium

Fascia of the distal portion of the thigh and proximal portion of the shank Femur

Ischial tuberosity Fascia over the biceps and ischial tuberosity tuberosity

Medial condyle of the tibia The gracilis in the fascia of the shank

the thigh, extensor of the shank Adductor of the leg

Adductors of the thigh Flexor of the shank Flexor of the shank