Unit Lab 13 A&P1

Indicate whether the biceps brachii is located on the anterior (A) or the posterior (P) surface of the body and then indicate the action of the muscle.

A; flexes and supinates the forearm

Indicate whether the flexor carpi radialis is located on the anterior (A) or the posterior (P) surface of the body and then indicate the action of the muscle.

A; flexes wrist and abducts hand

Indicate whether the extensor digitorum is located on the anterior (A) or the posterior (P) surface of the body and then indicate the action of the muscle.

P; extends fingers and wrist

Indicate whether the triceps brachii is located on the anterior (A) or the posterior (P) surface of the body and then indicate the action of the muscle.

P; extends the elbow

Indicate whether the extensor carpi ulnaris is located on the anterior (A) or the posterior (P) surface of the body and then indicate the action of the muscle.

P; extends wrist and adducts hand

Which of the following muscles is one of the rotator cuff muscles?

Supraspinatus

Distinguish between the triceps brachii and the biceps brachii in terms of location and function.

Triceps brachii is only muscle on posterior side of the arm, and it extends the forearm. The biceps brachii is found on the anterior side of the arm and flexes and supinates the forearm.

The middle fibers of the deltoid muscle __________.

abduct the arm

One of the actions of the latissimus dorsi muscle is to __________.

adduct the arm

The pectineus muscle __________ the thigh and is innervated by the __________ nerve.

adducts and flexes; femoral

The flexor carpi ulnaris __________.

adducts the wrist

The origin of the Sartorius muscle is from the __________ spine.

anterior superior iliac

The deltoid muscle fibers are separated into __________.

anterior, middle, and posterior

At the completion of supinator action, the palm is turned __________.

anteriorly

The pectoralis major muscle can be divided into groups of fibers superior, or __________, and inferior, or __________.

clavicular; sternocostal

The actions of the internal obliques include __________.

compression of the abdomen to assist in forced expiration

The origin of the serratus anterior includes __________ ribs.

eight

The main action of the fibularis longus is to __________.

evert the foot

The action of the extensor digitorum longus muscle is to __________.

extend digits

The semimembranosus __________ the thigh at the hip and __________ the leg at the knee.

extends; flexes

The gluteus maximus is the most powerful muscle during _________

extension

The origin of the external obliques includes ribs __________.

five through twelve

Both heads of the biceps femoris muscle __________.

flex the leg at the knee

The soleus muscle __________ the foot at the ankle and is innervated by the __________.

flexes; tibial nerve

The insertion of the extensor digitorum branches into __________.

four tendons

The soleus muscle shares an insertion with the __________.

gastrocnemius muscle

The origin of the flexor carpi radialis is on the __________.

humerus

The majority of the fibers of the gluteus maximus insert onto the __________.

iliotibial tract

The tibialis anterior muscle dorsiflexes the foot at the ankle and also assists in __________ of the foot.

inversion

The long head of the biceps femoris muscle originates on the __________.

ischial tuberosity

The tensor fasciae latae stabilizes the hip joint and the __________ joint.

knee

The trapezius muscle may be separated into all of the following groups, except __________.

lateral

The origins of the lateral head of the gastrocnemius muscle are the __________.

lateral condyle and posterior surface of the femur

The actions of the rhomboid major on the scapula do not include __________.

lateral rotation

The origin that the vastus medialis muscle shares with the vastus lateralis is the

linea aspera of the femur

The masseter is innervated by the _____________ branch of the trigeminal nerve.

mandibular

The key actions of the pectoralis major muscle are __________.

medial rotation and adduction

The masseter muscle originates on the __________.

medial surfaces of the maxilla and the zygomatic arch as well as the inferior border of the zygomatic arch

The insertion of the extensor carpi radialis longus muscle is on __________.

metacarpal two

The latissimus dorsi inserts __________.

on the intertubercular groove of the humerus

The pectoralis minor muscle is innervated by the __________.

pectoral nerves

The semitendinosus muscle lies ______________ to the semimembranosus muscle

posterior

The biceps femoris is located in the __________.

posterior thigh

All fibers of the semimembranosus muscle converge to insert on the __________.

posterior tibia

The insertion of the pectineus muscle is __________ and on the __________.

posterior; femur

Of all the flexor muscles of the forearm, the __________ is the shortest.

pronator teres

The origins of the rectus abdominus muscle are on the __________

pubic bone

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

All fibers of the trapezius muscle are innervated by the __________

spinal accessory nerve

The gluteus medius muscle is innervated by the __________.

superior gluteal nerve

The two heads of the gastrocnemius muscle converge to insert onto __________.

the calcaneus

The posterior surface of the tibial shaft is __________.

the origin of the flexor digitorum longus

The semitendinosus muscle is innervated by the __________ nerve.

tibial

The flexor digitorum longus muscle is innervated by the __________.

tibial nerve

The gastrocnemius muscle is innervated by the __________.

tibial nerve

The actions of the extensor carpi radialis brevis are localized to the __________

wrist