muscles Flashcards
what are the 3 types of muscles
agonist, antagonist, fixator
what is the agonist muscle
muscle of muscles responsible for the movement
what is the example of the agonist muscle
knee flexes, the biceps femoris on the posterior side of the femur contracts
what is the antagonist muscle
muscle or muscles that relax that relax in response to the active muscle
what is the example of the antagonist muscle
when the knee flexes, the rectus femoris on the superior side of the femur is relaxed and this allows the knee to go into flexion
what is the fixator muscle
muscle or muscles that help to stabilise a joint or joints
what is the example of a fixator muscle
while the biceps and rectus femoris are acting as agonists and antagonists the abdominal, obliques and spinle muscles act as fixators holding the body still while it works
what are 6 examples of agonist muscles
elbow, hips, knee, ankle, shoulder, vertebral column
what flexes at the elbow
biceps brachii
what extends at the elbow
triceps brachii
what flexes at the hips
iliopsoas
what extends at the hips
gluteus maximus
what abducts at the hips
gluteus medias
what adducts at the hips
adductor longus
what flexes at the knee
biceps femoris, semi teodinosus, semimembranosus (hamstrings)
what extends at the knee
rectus femoris, vastus medialis, vastus lateralis (quadracepts)
what plantar flexes at the ankle
gastrochemius
what dorsi flexes at the ankle
tribialis anterior
what flexes at the shoulder
anterior deltoid
what extends at the shoulder
posterior deltoid
what abducts at the shoulder
middle deltoid
what adducts at the shoulder
latissimus dorsi
what horizontally flexes at the shoulder
pectoralis major
what horizontally extends at the shoulder
trapezius
what flexes at the vertebral column
rectus abdominus
what extends at the vertebral column
erector square
what laterally flexes at the vertebral column
obliques
