What is the Linea alba?
A band of white fibrous tissue running down the middle of the abdominal wall from the base of the sternum to the top of the pelvis.
What muscles are involved in mastication?
masseter, lateral pterygoid, medial pterygoid, temporalis
define agonist and antagonist.
The agonist is the prime mover and the antagonist is the muscle that works against it.
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
Give an example of a 1st class lever in the body.
nodding of the head
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
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.
What are synergists?
muscles that work together to create one movement.
What is the proper name of the "kissing" muscle?
orbicularis oris
What is the extensor retinaculum?
the extensor retinaculum is a fibrous band that holds the extensor tendons in place and prevents bow-stringing
label A, B, C, and D
A-frontalis, B-Occipitalis, C- sternocleidomastoid, D-posterior triangle
label E, F, G and H
E-temporalis, F-orbicularis oculi, G-Zygomaticus minor, H- Zygomaticus minor
Label I, J, K, L and M
I-masseter, J-orbicularis oris, K-buccinator, L-platysma, M-trapezius
label N and O
N-lateral pterygoid, O-medial terygoid
