muscle system Flashcards
What are the tree primary kinds of muscles?
smooth muscles: intestines
cardiac muscles: heart
skeletal muscles: attaches and moves bones
Name three purposes of Skeletal Muscles
Movement, Posture, Warmth
Most important muscle of the neck for rotation?
sternocleidomastoid
Name the four major muscles of the abdominal group?
transverse abdominus (cough), internal oblique (deep tissue), external oblique (exterior tissue), rectus abdominus (6 pack)
What muscles are the primary hip flexors?
psoas major and iliacus
The activity of muscles when they shorten?
Contractions
What are the two types of muscle activation and how are they different?
Isotonic Contraction: when a muscle shortens in length and origin and insertion points draw together
Isometric Contraction: When a muscle strains against resistance but does not change in length
When muscles act in mutual opposition to provide stability of bones and joints what is happening?
agonist: muscle producing movement
antagonist: producing the opposite movement
muscle of the upper back that assists with head movement, shrugs, etc.
trapezius
widest muscle of the back that allows for the “swimmer stroke”?
latissimus dorsi
Muscle of the upper chest that flexes, adducts, and medially rotates the arm?
pectoralis major
prime mover of the upper arm in all directions?
deltoid
primary mover of the upper arm is opposed by the muscle of the posterior arm called
triceps
four muscles that stabilize the shoulder joint are?
suprasinatus, infraspinatus, teres minor, subscapularis
Group of four anterior thigh muscles?
quadriceps remoras (rectus femoris, vastus lateralis, vastus medialis, vastus intermedius)
