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Muscles Review
Which letter represents the
masseter?
Answer
• Letter E
• Name an everyday activity that works the
masseter.
Answer
• Eating
• (Opens and closes the jaw)
What is letter B?
• Sternomastoid
Hypothesize where the origin and
insertion of the sternomastoid are.
Answer
• Sternum and mastoid (below ear)
• What movement does this muscle
perform?
• Turns the head either to the right or the
left.
What muscle is the arrow pointing
to?
Answer
Name one movement of the
orbicularis oculi
Answer
• Winking
What muscle is this?
Answer
• Orbicularis oris
What muscle rests on these lines?
Answer
• Zygomaticus
What is the function of the
zygomaticus?
Answer
• It raises the corners of the mouth.
Name a function of the digastric
Answer
• It helps close the jaw.
What is the origin of the mylohyoid
and sternohyoid?
Locate the sternothyroid.
What is this muscle?
Answer
• Pectoralis major
What exercise will strengthen this
muscle?
Answer
• Pushups
• Weightlifting
• Where is the xiphohumeralis muscle?
Synergist of pecs
• The most posterior, flat, thin, and long strip
of pectoral muscle is the Xiphihumeralis. It
is a band of parallel fibers that is found in
felines but not in humans. Its origin is the
Xiphoid Process of the sternum. The
insertion is the humerus.
Locate the latissimus dorsi
What is the function of the
latissimus dorsi?
Answer
• It helps move the arm
What is the six-pack known as?
Answer
• Rectus abdominis
Name an exercise that will develop
the rectus abdominis
Answer
• Situps
Differentiate between the external
and internal obliques.
Name the functions of the obliques.
Answer
• Rotates and abducts the trunk
What is the function of the
transverse abdominis
Answer
• It stabilizes the pelvis
What is the location of the
acromiodeltoid?
Differentiate between the triceps brachii
and the biceps brachii
They are antagonists. One flexes and one extends the arm
• What do the trapezius set of muscles do?
Controls the scapula and the upper spine.
• Locate the brachioradialis
• Describe the function of the brachioradialis
• It pronates and supinates the forearm.
Ex. Turning a doorknob
• Locate the extensor carpi radialis longus
• Name the function of the extensor carpi
radialis longus
• Finger extension and moves the wrist
• Helps a person to play the piano
• Name other synergists to the extensor
carpi radialis longus
Extensor digitorium communis
Extensor digitorium lateralis
Extensor carpi ulnaris
• Locate the sartorius
• Name an activity that uses the sartorius
• The sartorius muscle assists in flexing,
weak abduction and lateral rotation of hip,
and flexion of knee. Looking at the bottom
of one's foot, as if checking to see if one
had stepped in gum, demonstrates all four
actions of sartorius.
Flexes the thigh
Differentiate between the gluteus medius and maximus
• What is their function?
• Moves hip and thigh
• It is the strongest muscle of the body
• Locate the vastus lateralis
• What is the function of the vastus
lateralis?
• It is the largest synergist of the
quadriceps. It helps to extend the knee.
• Locate the biceps femoris
It is located on the back of the thigh.
• What is the role of the biceps femoris?
• Knee flexion
• It is part of the hamstrings
• Locate the semitendinosus
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Locate the iliopsoas
Pectineus
Adductor longus
Adductor magnus
Vastus lateralis
Rectus femoris
Vastus medialis
Semimembranosus
Synergists of hamstrings