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Muscles bio125

head/face/thorax and shoulder muscles

QuestionAnswer
Orbicularis Oculi muscle around eye(closes eyes)
Orbicularis Oris under mouth(closes lips)
Temporalis skull above ear(closes jaw)
Zygomaticus raises lateral corners of mouth upward (smiling muscle)
Sternocleidomastoid neck(flexes and laterally rotates head)
Masseter jaw(prime mover of jaw closure)
Buccinator between zygomaticus & masseter (compresses cheek)
Trapezius side of neck on shoulders (Stabilizes,raises,retracts, and rotates scapula)
Pectoralis major pecks(arm flexion,rotates arm medially,adducts arm)
Pectoralis minor under pecks major(draws scapula forward& downward)
Deltoid shoulder muscle(arm flexion,rotates arm,& adducts arm)
Latissimus dorsi back below scapula(extension of humerous)
Supraspinatus above spine of scapula(initiates abduction)
infraspinatus deep to deltoid(rotates humerous laterally)
Teres major by armpit posterior(extends,medially rotates, and adducts humerus)
Internal intercostals superior muscles of ribs(draw ribs together and depress rib cage)
External intercostals inferior muscles of ribs(pull ribs toward one another to elevate rib cage)
Created by: rebecca1121
 

 



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