Muscle Movements
Moves two bones closer together by shortening the angle of a joint.
Example: straightening the knee
flexion
The fascicles all join to a single point.
convergent
Muscles that produce opposite movements from each other are called
antagonists
This name is given to circular muscles that open and close
orbicularis
These muscles are found in between the ribs
intercostals
movement of a bone around its longitudinal axis.
Ex: shaking your head "no"
rotation
The fascicles are arranged in concentric rings
circular
The main muscle responsible for the desired movement
prime mover
Why is the masseter given its name?
to "masticate" means to chew and the masseter is the muscle that is responsible for chewing
This muscle is deep to the platysma
sternocleidomastoid
movement of a limb toward the body midline.
Ex: bringing your arms closer to your body
Adduction
A modification of parallel muscles in which the middle of the muscle is expanded
fusiform
Muscles that work with other muscles
synergist muscles
This name is given to muscles that have fibers that run parallel to the body or bone
rectus
If someone has a 6-pack, which muscles are we seeing that are defined?
rectus abdominus
Rotating your palm so that it faces upwards
supination
A muscle attached obliquely to a tendon at one end
unipennate
Muscles that hold a bone still to stabilize the origin of the prime mover
fixators
This name is given to muscles that are the smallest in their muscle group
This muscles are responsible for moving the fingers back and forth
Extensor digitorum
Flexor digitorum
Pointing your toes toward your head
dorsiflexion
the length of the fascicles run parallel to the long axis of the muscle
parallel
Each group can answer
List a prime mover/antagonist pair
many options
What can you infer about fibularis longus just by its name?
it is attached to the fibula and is the longest in the muscle group
Each group gets to answer
Name the muscles in the quadriceps
rectus femoris
vastus lateralis
vastus medialis
vastus intermedius
Turning the sole of your foot laterally
eversion
obliquely muscles inserted at many sides of tendons
multipennate
When dorsiflexing, which muscle is the prime mover and which one is the antagonist?
The prime mover is the tibialis anterior and the antagonist is the gastrocnemius
Why are the pectoralis major and the pectoralis minor given their respective names?
The major is larger and more superficial while the minor is smaller and more deep
This back muscle extends from the spine laterally around the sides
latissimus dorsi