DE Anatomy: muscular system Flashcards
the name means “straight muscle of the abdomen”
rectus abdominis
prime mover for shoulder flexion and adduction
pectoralis major
prime mover for shoulder abduction
deltoid
part of the abdominal girdle; forms the external lateral walls of the abdomen
external oblique
acting alone, each muscle of this pair turns the head toward the opposite shoulder
sternocleidomastoid
besides the two abdominal muscles (pairs) named above, two muscle pairs that help form the natural abdominal girdle
internal oblique and transversus abdominis
deep muscles of the thorax that promote the inspiratory phase of breathing
external intercostal
an unpaired muscle that acts with the muscles named immediately above to accomplish inspiration
diaphragm
muscle that allows you to shrug your shoulders or extend your head
trapezius
muscle that adducts the shoulder and causes extension of the shoulder joint
latissmus dorsi
shoulder muscle that is the antagonist of the muscle just described
deltoid
prime mover of back extension; a deep composite muscle consisting of three columns
erector spinae
large paired superficial muscle of the lower back
latissimus dorsi
fleshy muscle forming part of the posterior abdominal wall that helps maintain upright posture
quadratus lumborum
hip flexor, deep in pelvis; a composite of two muscles
iliopsoas
used to extend the hip when climbing stairs
gluteus maximus
“toe dancer’s” muscle; a two-bellied muscle of the calf
gastrocnemeus
inverts and dorsiflexes the foot
tibialis anterior
muscle group that allows you to draw your legs to the midline of your body, as when standing at attention
adductors
muscle group that extends the knee
quadriceps
muscle group that extends the thigh and flexes the knee
hamstrings
smaller hip muscle commonly used as an injection site
gluteus medius
muscle group of the lateral leg; plantar flex and evert the foot
fibularis muscles
strap like muscle that is a weak thigh flexor; the “tailor’s muscle”
sartorius
