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