HW CH 7 part 2
The middle fibers of the deltoid muscle __________.
abduct the arm
The deltoid muscle fibers are separated into __________.
anterior, middle, & posterior
At its insertion (unlike at its origin), the buccinator muscle __________.
attaches to fibers of another facial muscle
Both heads of the biceps femoris muscle __________.
flex the leg at the knee
The muscle that inserts with the gastrocnemius to the calcaneus, via the calcaneal tendon, is the
soleus
The two heads of the gastrocnemius muscle converge to insert onto __________.
the calcaneus
The muscle that dorsiflexes the foot is the
tibialis anterior
Which muscle extends the elbow during the action of push-ups?
triceps brachii
The smallest of the posterior extensors of the elbow joint is the __________.
anconeus
This muscle allows you to do a "pull-up," or pull yourself up from a hanging position.
biceps brachii
The muscle that compresses the cheeks, as when pursing the lips and blowing forcefully, is the ________.
buccinator
The buccinator muscle __________.
compresses the cheeks
A muscle that inserts on the radial tuberosity is most likely involved in
elbow flexion
Which muscle functions to maintain an erect spinal column and head?
erector spinae
The gluteus maximus is the most powerful muscle during __________.
extension
The buccinator muscle is innervated by the __________.
facial nerve
The majority of the fibers of the gluteus maximus insert onto the __________.
ileotibial tract
The origin of the long head of the triceps brachii is on the __________.
infraglenoid tubercle of the scapula
The long head of the biceps femoris muscle originates on the __________.
ischial tuberosity
The origins of the lateral head of the gastrocnemius muscle are the __________.
lateral condyle and posterior surface of the femur
Which muscle inserts into the intertubercular groove of the humerus and acts to extend, adduct, and medially rotate the shoulder?
latissimus dorsi
Where is the rectus femoris found?
on the center of the anterior thigh; part of quadriceps muscle group
To allow for flexion, the __________ unlocks the knee joint.
popliteus
The muscles that extend the forearm are located __________.
posteriorly
All fibers of the triceps brachii are innervated by the __________.
radial nerve
The two heads of the biceps brachii combine to insert on the __________.
radial tuberosity
The two heads of the biceps brachii muscle come together distally to insert on the __________.
radial tuberosity
Muscles comprising the quadriceps group include the
rectus femoris, vastus intermedius, vastus lateralis, and vastus medialis
The gastrocnemius muscle is innervated by the __________.
tibial nerve
The gastrocnemius is what to the soleus?
posterior
The biceps femoris is located in the __________.
posterior thigh
The pectoralis major muscle can be divided into groups of fibers superior, or __________, and inferior, or __________.
clavicular; stenocostal
The key actions of the pectoralis major muscle are __________.
medial rotation and adduction