The agonist is the prime mover and the antagonist is the muscle that works against it.
15
Define the origin, the insertion and the belly of the muscle.
The origin is where it connects to the more stationary bone, the insertion is where it connects to the more movable bone, the belly is is the widest and contain
15
What defines the extrinsic muscles of the hand or foot?
They are the muscles that are not located in the hand or foot that move the hand or foot
15
Give an example of a 1st class lever in the body.
nodding of the head
15
Give an example of the 2nd class lever in the body
The gastrocnemius pulling the Achilles tendon to cause a person to stand on tip toe
15
Give an example of a 3rd class lever in the body.
The bicep brachii pulling on the forearm near the elbow to raise the hand.
15
What are synergists?
muscles that work together to create one movement.
15
Do abdominal muscles support the spine?
the abdominals and back work together to support the spine when we sit, stand, bend over, pick things up, exercise and more.
15
What is the proper name of the "kissing" muscle?
orbicularis oris
15
What is the extensor retinaculum?
the extensor retinaculum is a fibrous band that holds the extensor tendons in place and prevents bow-stringing