Muscle Lab 1

wrinkles forehead, Draws back scalp, wrinkles forehead, raises eyebrows
Zygomaticus Major
raises corner of mouth, smiling muscle, raises corners of mouth upwards
Orbicularis oculi
closes eye
compresses cheek, compresses cheek, allowing for rapid changes in volume of mouth cavity
chewing, a large muscle that raises the lower jaw and is used in chewing
Orbicularis oris
closes mouth, Closes and protrudes lips; used in whistling and forming many letters during speech; the "kissing muscle"
turns head, flexes neck; rotates head
abducts arm, Shoulder muscle that causes shoulder abduction
raises shoulder, muscle that allows you to shrug your shoulders or extend your head
Pectoralis major
flexes shoulder, Chest muscle that causes shoulder flexion, adduction and horizontal adduction
Pectoralis minor
draws scapula forward, a skeletal muscle that draws down the scapula or raises the ribs
Serratus anterior
draws scapula forward, pulls scapula downward and forward
Rectus abdominis
flexes abdomen, Sit-up muscle. Medial trunk muscle from the pubis to the rib cage. Give abdomen a wash-board appearance. Flexes vertebral column. Compresses abdomen.
External oblique
rotates trunk, compresses abdominal wall, laterally rotates trunk
Internal oblique
rotates trunk, compresses abdominal wall, laterally rotates trunk
Transversus abdominus
compress abdomen, compresses abdominal contents (deepest layer)
Latissmus dorsi
extends shoulder, extends the shoulders and adducs the arm,swimmers muscle
abduct humerus, Abduct the shoulder, stabilize head of humerus in glenoid cavity
lateral roation humerus, Laterally rotates shoulder; stabilizes the head of the humerus in glenoid cavity; one of the "rotator cuff" muscles
medial rotation humerus, medial rotation of humerous
Teres minor
lateral rotation humerus, Laterally rotates arm; one of the "rotator cuff" muscles
Teres major
medial rotation humerus, extends, medially rotates and adducts humerus