Muscle Lab Exam
The action that moves the scapula towards the head is called __________.
elevation
The infraspinatus inserts on the ____________ of the humerus.
greater tubercle of the humerus
The insertion of the teres minor is on the __________.
greater tubercle of the humerus
On to which structure does the highlighted muscle insert?
distal phalanx of thumb
This forearm muscle is a powerful wrist flexor.
flexor carpi radialis
Which muscle is highlighted?
flexor digitorum superficialis
Which muscle is highlighted?
flexor pollicis brevis
This muscle allows you to stand on tiptoe when the knee is extended, and it flexes the knee when the foot is dorsiflexed.
gastrocnemius
Which muscle is highlighted?
gastrocnemius
The soleus muscle shares an insertion with the __________
gastrocnemius muscle
Which muscle is highlighted?
triceps brachii, medial head
The prime mover of elbow extension is the __________.
triceps brachii
What is an action of the highlighted muscle at the hip?
adducts the thigh
This two-headed muscle bulges when the forearm is flexed. It is the most familiar muscle of the anterior humerus. It is the __________.
biceps brachii
Which muscle is highlighted?
biceps femoris
Which muscle originates on the pubic crest and symphysis and inserts on the xiphoid process and costal cartilages of ribs V through VII?
D. The rectus abdominis originates on the pubic crest and symphysis and inserts on the xiphoid process and costal cartilages of ribs V through VII.
Art-labeling Activity: Figure 13.2 (2 of 4)
Platysma, Pectoralis Major, Intercostals, Sternohyoid, Sternocleidomastoid, Pec minor, Serratis amterior
The origin of the Sartorius muscle is from the __________ spine.
anterior superior iliac
Which muscle is highlighted?
flexor carpi ulnaris
Which muscle is highlighted?
flexor digitorum longus
Which structure is indicated by the arrow?
iliotibial tract
Which muscle is highlighted?
internal oblique
The pectoralis minor muscle is innervated by the __________.
pectoral nerves
The most powerful movement at the ankle joint is __________, and the ________ is one of the prime movers of this movement.
plantar flexion; gastrocnemius
Which muscle is highlighted?
plantaris
Muscles that move the foot and toes
plantaris, gastrocnemius, soleus, calcaneal tendon
The flexor hallucis longus muscle originates from the __________.
posterior surface of the fibular shaft
The muscles that extend the forearm are located __________.
posteriorly
Which muscle is highlighted?
risorius
The infraspinatus muscle is included in the __________ muscles
rotator cuff
The anterior muscles of the thigh that originate on the os coxae are __________.
sartorius; rectus femoris
Which movement results after the contraction of the serratus anterior muscle?
scapular protraction and rotation
Which muscle is highlighted?
semitendinosus
Drag the correct label to the appropriate location on the oblique and rectus muscles.
serratus anterior, external oblique, tendinous inscription, rectus abdominis, linea alba, internal intercostal, external intercostal, internal oblique, external oblique, cut edge of rectus sheath
Which muscle is highlighted?
supinator
Which muscle is highlighted?
supraspinatus
Intrinsic Muscles of the thumb
tendons of flexor digitorum, adductor pollicis, flexor pollicis brevis, opponens pollicis, abductor pollicis brevis
Which muscle is highlighted?
teres minor
Which letter represents the biceps brachii muscle?
A. The biceps brachii is a two-headed fusiform muscle. The tendon of the long head helps to stabilize the shoulder joint
Art-labeling Activity: Figure 13.2 (1 of 4)
Trapezius, Deltoid, Triceps Brachii, Pronator teres, Brachioradialis, Biceps Brachii
Muscles of facial expression differ from most skeletal muscles because they usually do NOT insert into a bone.
True
The anterior axial muscle that crosses the glenohumeral joint is the pectoralis major muscle.
True
The middle fibers of the deltoid muscle __________.
abduct the arm
The primary action of muscle on the medial compartment of the thigh is ________.
adduction of the thigh
Which muscle is highlighted?
adductor magnus
The medial muscles of the hip joint that insert on the linea aspera are the __________.
adductor magnus, adductor brevis, and adductor longus
The deltoid muscle fibers are separated into __________.
anterior, middle, and posterior
Which muscle is highlighted?
coracobrachialis
This pair of muscles includes the prime mover of inspiration, and its synergist.
diaphragm and external intercostals
Which muscle is highlighted?
extensor carpi ulnaris
Which muscles are highlighted?
external intercostal
Which muscle is highlighted?
fibularis longus
The soleus muscle __________ the foot at the ankle and is innervated by the __________.
flexes; tibial nerve
What is an action of the highlighted muscle?
flexion of vertebral column
The insertion of the extensor digitorum branches into __________.
four tendons
The origin of the long head of the triceps brachii is on the __________.
infraglenoid tubercle of the scapula
The flexor hallucis longus muscle originates on the __________.
interosseous membrane
Drag the labels onto the diagram to identify the superficial and deep muscles of the pelvic floor.
ischiocavernosus, bulbospongiosus, superficial transverse perineal, external urethral sphincter, pubococcygeus, coccygeus
The posterior axial muscle that crosses the glenohumeral joint is the __________
latissimus dorsi
Which muscle is highlighted?
masseter
The extensor hallucis longus muscle inserts on digit __________.
one
Brachioradialis and sternocleidomastoid are named for ________.
the location of their origin and insertion
The tibialis posterior muscle originates at which three locations?
tibia, fibula, and interosseous membrane
The smallest of the posterior extensors of the elbow joint is the __________
anconeus
The vastus intermedius __________ the leg at the knee.
extends
The prime mover of wrist extension is the __________.
extensor digitorum
The two muscles that insert on the fifth phalanx or on the fifth metatarsal are the __________.
extensor digitorum longus and fibularis tertius
This muscle is named for the direction of its fibers.
external oblique
The biceps femoris is located in the anterior compartment of the thigh.
false
The prime mover of hip extension is the __________.
gluteus maximus
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
Which movement is not associated with the scapula?
opposition
The two heads of the biceps brachii muscle come together distally to insert on the __________.
radial tuberosity
Eversion of the foot is a function of the __________.
fibularis longus
the prime mover of dorsiflexion is the
tibialis anterior
Which muscle is a prime mover of arm adduction?
B. This is the pectoralis major muscle, which is a prime mover of arm flexion, rotates arm medially, and adducts arm. Always look for origins and insertions and picture what would happen if the muscle contracted.
Identify the palmaris longus muscle.
C. This muscle inserts into the fascia of the palm and acts to tense the skin and fascia of the palm during hand movement. It is interesting that this muscle is missing in just over 10% of humans.
Wrist abduction occurs through the actions of __________ muscles.
FOUR
What is the action of the muscle identified by the letter A?
It abducts and medially rotates the thigh and steadies the pelvis. It is an extremely important muscle for walking.
The soleus and the gastrocnemius share an insertion on the __________.
calcaneus
The __________ is a prime mover of the glenohumeral joint during flexion.
deltoid
Name the muscle at A.
orbicularis oculi
Which of the following muscles assists during extension of the glenohumeral joint, but is not as a prime mover?
teres major
What is an action of the highlighted muscle?
abduction of arm at shoulder
Which muscle is highlighted?
abductor pollicis longus
A prime mover or __________ produces a particular type of movement.
agonist
What is an action of the highlighted muscle?
arm extension at shoulder
The muscle that generates the most power during elbow flexion is the __________.
brachialis
Which of the following muscles is not part of the shoulder?
brachialis
Of the nine muscles that cross the shoulder joint and insert on the humerus, which muscle is considered to be a prime mover?
deltoid
All fibers of the pectoralis major muscle converge on the lateral edge of the__________.
intertubercular sulcus
From which two bones does the highlighted muscle indirectly originate?
mandible and maxilla
Both the Psoas major muscle and iliacus muscle insert on the __________.
lesser trochanter of the femur
The subscapularis muscle inserts on the __________.
lesser tubercle of the humerus
Muscles that act on the __________ cause movement at the hip, knee, and foot joints.
lower limb
Muscles of the wrist and hand (anterior view, 1 of 2)Right Hand, anterior (palmar)view
lumbricals, palmar interosseus, abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi, palmaris brevis cut
On to what common structure do both heads of the highlighted muscle insert?
radial tuberosity of radius
Which of the following muscle does not form part of the rotator cuff?
teres major
Without lateral rotation of the humerus by the teres minor and infraspinatus muscles, the maximum angle of abduction by the deltoid would be __________.
90 degrees
Which muscle is the prime mover of arm abduction (assuming all fibers are used)?
A. The deltoid muscle has three sets of fibers. If all three are activated, the arm is abducted at the shoulder.
Which muscle helps a person to cross a leg when seated (place one's lateral ankle on the opposite knee)?
B. Sartorius laterally rotates and abducts the thigh, which would both be necessary in placing one ankle on the opposite knee when sitting.
Which muscle tenses the skin of the neck and assists in depression of the mandible?
B. The platysma muscle tenses the neck skin and aids in depressing the mandible. It originates in the fascia of the upper chest.
Which muscle has a unipennate arrangement of fascicles?
C. The extensor digitorum longus inserts into only one side of the tendon, giving it a unipennate arrangement.
Which muscle is an antagonist to the biceps brachii muscle?
D. The triceps brachii muscle extends the forearm, while the biceps brachii flexes it, making them antagonistic.
Which of the following statements about muscles of the elbow joint is true?
The brachioradialis originates and inserts on the ulna.The biceps brachii has two heads that share the same origin site.The biceps brachii is a posterior extensor. NONE OF THESE STATEMENTS IS CORRECT
The tensor fasciae latae stabilizes the hip joint and the __________ joint.
knee
The masseter is innervated by the _____________ branch of the trigeminal nerve.
mandibular
This muscle originates on the zygomatic arch and inserts at the angle and ramus of the mandible. It is responsible for closing the jaw.
masseter
This name reveals the number of the muscle's origins.
triceps brachii
Muscles of the foot (superior view, 1 of 2)
Superior extensor retinaculum, lateral malleolus fibula, inferior extensor retinaculum, tendons of extensor digitorum longus, dorsal interossei, tendons of extensor digitorum brevis
Which muscle is known as the "boxer's muscle" for its ability to move the arm horizontally, as in throwing a punch?
D. The serratus anterior can be used to violently pull the scapula laterally and thus pull the shoulder forward, adding strength to a horizontal punch.
Abduction requires the action of two muscles, and adduction requires the action of __________.
four muscles
Which muscle is highlighted?
gluteus medius
Like the deltoid muscle that lies over and abducts the shoulder, these two muscles lie over the hip and are prime movers of hip abduction. Neither muscle extends the hip.
gluteus medius and gluteus minimus
Which of the following letters represents the sartorius muscle?
B
The tensor fascia latae is involved in hip __________.
abduction
Which muscle is highlighted?
tensor fasciae latae
