1. Muscle Identification Part 1 Days 1,2,3

4. Temporalis Origin: Temporal Bone Insertion: mandible Action: close jaw (bite)

6. Orbicularis Oculi Origin: Frontal and maxilla bones Insertion: eyelid skin and fascia Action: blink, squint, etc

8. Orbicularis Oris Origin: maxilla and mandible Insertion: skin and muscles around lips Action: moves lips (kissing muscle)

10. Depressor anguli oris Origin: mandible below lateral incisors Insertion: corner of mouth Action: frowning

12. Buccinator Origin: molar region of maxilla and mandible Insertion: side of mouth Action: pulls corners of mouth laterally and compresses cheeks (whistling muscle)

14. Zygomaticus major Origin: anterior zygomatic arch Insertion: corner of mouth Action: smile

16. Masseter Origin: posterior zygomatic bone and temporal bone Insertion: ramus of mandible Action: close jaw (Bite)

18. Rhomboideus major Origin: spinous processes of vertebrae T2 – T5 Insertion: inferior medial border of scapula Action: retracts scapula and rotates it downwards

20. Pectoralis minor Origin: ventral side of ribs 3 – 5 Insertion: coracoid process of scapula Action: pulls shoulders forward and down

22. Levator scapulae Origin: Transverse processes of vertebrae C1 – C4 Insertion: superior medial border of scapula Action: elevates scapula (shoulders); shrugs (I don’t know muscle)

24. Latissimus dorsi Origin: vertebrae T9 – T 12 and iliac crest Insertion: proximal ventral humerus Action: pulls arms back (extensor of arms)

26. Pectoralis major Origin: upper abdominal aponeurosis, sternum and medial part of clavicle Insertion: proximal ventral humerus Action: adducts arms and shoulders

28. Trapezius Origin: vertebrae T12 all the way up to occipital bone Insertion: scapula spine, shoulder, lateral clavicle Action: extends neck and adducts scapula (pulls it medially)