muscle matching 1

• orbicularis oculi


  Origin: Medial margin of orbit

  Insertion: Skin around eyelids

  Action: Closes eye
• orbicularis oris


  Origin: Maxilla and mandible

  Insertion: Lips

  Action: Compresses, purses lips
• platysma


  Origin: fascia of chest

  Insertion: lower mandible

  Action: draws mouth downward
• occipitalis


  Origin: occipital bone

  Insertion: epicranial aponeurosis

  Action: retracts scalp
• frontalis


  Origin: cranial aponeurosis

  Insertion: skin of eyebrows

  Action: raises eyebrows
• masseter


  Origin: zygomatic arch

  Insertion: mandible

  Action: elevates mandible
• temporalis


  Origin: temporal bone

  Insertion: mandible

  Action: closes jaw
• medial pterygoid


  Origin: Pterygoid process of sphenoid bone

  Insertion: Medial ramus of mandible

  Action: Elevates mandible and moves it laterally
• lateral pterygoid


  Origin: Sphenoid bone

  Insertion: Anterior surface of mandibular condyle

  Action: Depresses and protracts mandible and moves it from side to side
• sternocleidomastoid


  Origin: clavicle and manubrium of sternum

  Insertion: mastoid process of temporal bone

  Action: rotates head, head flexion
• splenius


  Origin: mid-dorsal line

  Insertion: lambdoidal ridge

  Action: turns and raises head
• diaphragm


  Origin: xiphoid process

  Insertion: central tendon of diaphragm

  Action: Respiration, most important muscle in inspiration.
• external intercostals


  Origin: border of rib

  Insertion: border of adjacent rib

  Action: protracts ribs
• internal intercostals


  Origin: Superior border of each rib

  Insertion: Inferior border of the preceding rib

  Action: Depress ribs
• external obliques


  Origin: Outer surface of ribs 5-12, interdigitating with Serratus anterior; linea alba

  Insertion: Iliac crest, inguinal ligament

  Action: Compresses abdomen, opposite rotator of thoracic vertebrae
• internal obliques


  Origin: iliac crest, inguinal ligament and lumbar fascia

  Insertion: 10th to 12th ribs and rectus sheath

  Action: flexes and rotates vertebral column, compresses abdomen and depresses thorax
• transverse abdominis


  Origin: inguinal ligament, iliac crest, cartilages of last five or six ribs, and lumbar fascia

  Insertion: linea alba and pubic crest

  Action: compresses abdominal contents
• rectus abdominis


  Origin: pubic crest and symphysis

  Insertion: xiphoid process and costal cartilages of ribs 5-7

  Action: flexes and rotates vertebral column
• serratus anterior


  Origin: ribs 1-8

  Insertion: vertebral border of scapula Action: protracts scapula
• trapezius


  Origin: spinous processes of vertebrae C1-T12

  Insertion: external occipital protuberance, nuchal ligament, medial superior nuchal line, posterior border of the lateral third of the clavicle, acromion process, and spine of scapula

  Action: raises, rotates, and adducts the arm.
• rhomboids

  Origin: spinous processes of vertebrae

  Insertion: medial border of scapula

  Action: adducts scapula
• levator scapulae


  Origin: vertebrae

  Insertion: scapula

  Action: elevates scapula
• pectoralis minor


  Origin: sternum

  Insertion: humerus

  Action: adducts forelimb
• pectoralis major


  Origin: clavicular head: anterior border, sternocostal head: anterior surface of the sternum

  Insertion: Lateral lip of the bicipital groove of the humerus

  Actions: flexes, extends, adducts, and medially rotates the humerus. draws scapula anteriorly and inferiorly
• teres major


  Origin: scapula

  Insertion: humerus

  Action: medial rotates arm, adducts arm, extends arm
• teres minor


  Origin: lateral border of the scapula

  Insertion: inferior facet of greater tubercle of the humerus

  Actions: laterally rotates the arm, stabilizes humerus
• latissimus dorsi


  Origin: lower spine and iliac crest

  Insertion: proximal humerus

  Action: extends and adducts humerus
• supraspinatus


  Origin: supraspinous fossa of scapula

  Insertion: greater tubercle of humerus Action: Abduction at shoulder
• infraspinatus


  Origin: infraspinous fossa of scapula

  Insertion: greater tubercle of humerus

  Action: lateral rotation at shoulder
• deltoid


  Origin: clavicle and scapula

  Insertion: humerus

  Action: abducts arm
• subscapularis


  Origin: Anterior surface of scapula

  Insertion: Lesser tubercle of humerus

  Action: Rotates arm medially
• coracobrachialis


  Origin: Coracoid process

  Insertion: Medial margin of shaft of humerus

  Action: Adduction and flexion at shoulder