Muscles of Spine Flashcards
myofibrils are made up of what type of filaments
parallel, thick and thin
thick and thin filaments are linked how
cross bridges
origin means
site of attachment that is relatively fixed
insertion means
site of attachment that is normally displaced by contraction of the muscle
extrinsic muscles
associated with upper extremity and shoulder movement
intrinsic muscles
movement of the vertebral column
what are the superficial extrinsic muscle
trapezius, latissimus dorsi, rhomboid major and minor, levator scapulae
what are the intermediate extrinsic muscles
serratus posterior superior and inferior
elevators of the scapula
levator scapulae, trapezius upper, rhomboideus major and minor
retractors of the scapula
rhomboideous major and minor, trapezius
upward rotators of the scapula
trapezius upper and lower, serratus posterior
downward rotators of the scapula
rhomboideus major and minor, levator scapulae
what group of muscles are the strongest muscles in the back and take on most of the work
erector spinae
what muscle is the primary cause of lower back pain
quadratus lumborum
what muscle is actually part of the posterior wall of the abdomen
quadratus lumborum
