Human Anatomy (McKinley): Chapter 12 - Appendicular Muscles - Multiple Choice
quadratus plantae
Which muscle pulls obliquely on another muscle's tendons to prevent the toes from flexing at an angle?
levator scapulae
Which muscles allow you to shrug your shoulders?
abduct
On the foot as well as the hand, the dorsal interossei ____________ the digits.
sartorius
The name of the ____________ indirectly refers to the muscle's role in crossing one's legs.
sartorius and gracilis
The only muscles that flex both the thigh and the leg are the
rectus femoris
The only quadriceps muscle that moves both the coxal and knee joints is the
swollen muscles that compress blood vessels in a limb compartment
What causes compartment syndrome?
opposition swings the thumb across the palm toward the tips of digits 2-5, abduction increases the distance between the thumb and the index finger, adduction involves an angular movement at the first carpometacarpal joint
All of the following accurately describe movements of the thumb
supraspinatus, teres minor, subscapularis
All of the following are rotator cuff muscles
extending the thigh and flexing the leg
All of the hamstring muscles work together in which actions?
gastrocnemius; soleus
Because the two heads of the ____________ share a common tendon of insertion with the ____________, these muscles are collectively called the triceps surae.
medially rotate
Both the gluteus minimus and the gluteus medius abduct and ____________ the thigh at the coxal joint.
flexor retinaculum
Carpal tunnel syndrome results from compression of either the median nerve or the tendons in the narrow space between the carpal bones and the
originate mostly on the medial epicondyle of the humerus
Except for the deepest layer, the anterior muscles of the antebrachial region
four
How many layers of intrinsic muscles are on the plantar surface of the foot?
deltoid
In terms of adduction and abduction of the arm, which muscle opposes the pectoralis major and latissimus dorsi?
anteriorly; posteriorly
In the lower limb, hip flexors insert ____________ on the thigh, while knee flexors insert ____________ on the leg.
medial epicondyle of the humerus
Most of the forearm muscles in the anterior compartment originate on the
muscles that move the pectoral girdle, muscles that move the glenohumeral joint, intrinsic muscles of the hand
Muscles of the pectoral girdle and upper limbs are organized into all of the following groups
muscles that move the coxal joint/thigh, thigh muscles that move the knee joint/leg, intrinsic muscles of the foot
Muscles of the pelvic girdle and lower limbs are grouped by all of the following criteria
include the anconeus and supinator, are mostly extensors, are innervated by the radial nerve
Muscles with origins on the lateral epicondyle of the humerus
coracobrachialis
Of all the scapular muscles, the only one that flexes and adducts the arm is the
infraspinatus and teres minor
Of the following, which muscles are antagonists to the subscapularis?
iliopsoas and gluteus minimus
Of the following, which two muscles are antagonists to different actions of the gluteus maximus?
extensors of the knee joint
The ____________ all insert on the tibial tuberosity (by way of the patella).
teres major
The ____________ assists the subscapularis in medial rotation of the arm.
quadriceps femoris
The anterior thigh muscles that extend the leg are collectively called the
stabilize the pectoral and pelvic girdles, control the movements of the upper and lower limbs, work in groups that are either synergistic or antagonistic
The appendicular muscles
abduct; adduct
The dorsal interossei ____________ the toes, while the plantar interossei ____________ the toes.
shares a tendon of insertion and is often regarded as a single muscle
The gastrocnemius and soleus are like the psoas major and iliacus in that each pair
plantar flex the foot and flex the toes
The posterior muscles of the leg
originates on the iliac crest and anterior superior iliac spine, inserts on the iliotibial tract of the fascia lata, abducts and medially rotates the thigh
The tensor fasciae latae
median; ulnar
The thenar muscles are all innervated by the ____________ nerve; the hypothenar muscles, by the ____________ nerve.
invert
The tibialis anterior and tibialis posterior act synergistically to ____________ the foot.
dorsiflexion
The tibialis anterior opposes the soleus by performing which action?
sartorius
Which muscle performs most of the actions required to cross one's legs?
rectus femoris
What is the only muscle that flexes the thigh and extends the leg?
lateral rotation of the thigh
What is the sole action of all five deep muscles of the gluteal region?
lateral rotation
Which action is performed by the most muscles at the coxal joint?
extension
Which action is performed by the most muscles at the wrist?
extension
Which action is performed my most muscles in the posterior compartment of the forearm?
knee
Which joint has the most flexors?
fibularis longus and fibularis brevis
Which leg muscles work together to evert the foot?
serratus anterior
Which muscle contributes most directly to the careers of boxers?
gluteus maximus
Which muscle extends and laterally rotates the thigh?
latissimus dorsi
Which muscle extends, adducts, and medially rotates the arm?
gluteus medius
Which muscle has the same actions as the tensor fasciae latae and is a frequent site of intramuscular injections?
tibialis anterior
Which muscle is the primary antagonist of the muscles that insert on the calcaneus?
triceps brachii
Which muscle is the prime mover in extension of the elbow?
serratus anterior
Which muscle is the prime mover in protraction of the scapula?
palmaris longus
Which muscle of the upper limb inserts onto specialized areas of deep fascia rather than bone?
extensor carpi ulnaris, flexor carpi radialis, abductor pollicis longus
Which of these muscles move the wrist?
the two develop separately in the embryo and later join at the patella
Which statement is false regarding the quadriceps tendon and patellar ligament?
gastrocnemius
Which superficial leg muscle has two bellies that compose the calf?
adductor magnus
Which thigh adductor has an origin on the ischial tuberosity?