Flexor digitorum longus
Gastrocnemius and soleus
The vastus intermedius
The vastus medialis
The vastus lateralis
Extensor digitorum longus
Anterior compartment of the thigh
Posterior muscle group of the thigh
Medial compartment of the thigh
All names reflect direction of muscle fibers.
Each acts synergistically to elevate the jaw.
All act on the tongue.
All names indicate the relative size of the muscle.
Have load at one end of the lever, fulcrum at the other, and effort applied somewhere in the middle
Are typified by tweezers or forceps
In the body can operate at a mechanical advantage or mechanical disadvantage, depending on specific location
Are the type found in the joints forming the ball of the foot as used in raising the body on the toes
Iliopsoas and rectus femoris
Internal intercostals and diaphragm.
External intercostals and diaphragm.
Rectus abdominis and diaphragm.
The triceps brachii
The flexor digitorum profundus
Muscles appear to be straplike
There is a narrow origin diverging to a broad insertion
There is a broad origin and fascicles converge toward a single tendon
Muscles look like a feather
Closes, purses, and protrudes the lips
Pulls the lower lip down and back
Draws the eyebrows together
Allows blinking, squinting, and various other protective mechanisms for the eye
Biceps brachii acts as antagonist
Triceps brachii acts as antagonist
Brachioradialis acts as antagonist
Coracobrachialis acts as antagonist
The type of muscle fibers
The type of action they cause
Muscles produce movement by pulling on bones.
The bones serve as levers.
During contraction the two articulating bones move equally.
The movements produced may be of graded intensity.
Load is far from the fulcrum and the effort is applied near the fulcrum
Lever system is useless
Effort is farther than the load from the fulcrum
Load is near the fulcrum and the effort is at the distal end