Muscles and their functions Flashcards
Frontalis (facial muscle)
raises eyebrows
Orbicularis oculi
closes eyes, squints, blinks, winks
facial muscle
Orbicularis oris
closes mouth and portrudes the lips
facial muscle
Buccinator
flattens the cheeks, chews
facial muscle
Zygomaticus )
raises corners of the mouth
facial muscle
Masseter
Closes jaw and elevates mandible
chewing muscles
Temporalis
synergest of the masseter, closes jaw
chewing muscles
Platysma (neck muscles)
Platysma – pulls the corners of the mouth inferiorly
Sternocleidomastoid (neck muscles)
flexes the neck, rotates the head
Pectoralis major
Pectoralis major - adducts and flexes the humerus
Intercostal muscles –
Intercostal muscles – movement of rib cage for breathing
Rectus abdominis
Rectus abdominis - flexes vertebral column and compresses abdominal contents (defecation, childbirth, forced breathing)
External and internal obliques
flex vertebral column; rotate trunk and bend it laterally
Transversus abdominis
compresses abdominal contents
Trapezius
elevates, depresses, adducts, and stabilizes the scapula