Muscles of the Arm

Question 1

Maximus

Answer 1

Largest

Question 2

Flexor Digitorum Superficialis OIA

Answer 2

O: medial epicondyle of the humerus, ulna, radius
I: middle phalanges of the four fingers
A: flexes digits

Question 3

Rotator cuff (Picture)

Answer 3

Question 4

Supinator OIA

Answer 4

O: humerus, ulna
I: radius
A: supinates the forearm

Question 5

Insertion

Answer 5

Attachment point of the muscle that moves during contraction

Question 6

Fixator

Answer 6

Prevents movement of bone that the prime mover is attached to

Question 7

Synergist

Answer 7

Aids the prime mover
Stabilizes the nearby joint
Modifies the direction of movement that occurs

Question 8

Origin

Answer 8

Attachment point of the muscle that does not move during contraction

Question 9

Extensor Digitorum OIA

Answer 9

O: lateral epicondyle

I: middle and distal phalanges of the 2-5th fingers

A: extends hand, wrist and fingers

Question 10

Biceps Brachii OIA

Answer 10

O: short head: coracoid process of the scapula. long head: supraglenoid tubercle
I: radial tuberosity
A: flexes elbow and supinates forearm

Question 11

Antagonist

Answer 11

Opposes the prime mover
Preventing excessive movement and injury

Question 12

Extrinsic

Answer 12

muscles move the fingers but are found outside the hand

Question 13

Rotator Cuff includes? function?

Answer 13

Supraspinatus
Infraspinatus
Teres Minor
Subscapularis

Holds the humerus within the glenoid cavity

Question 14

Trapezius OIA

Answer 14

O: external occipital protuberance, spinous processes of vertebrae C7-T12

I: clavicle, acromion process, and spine of scapula

A: rotation, retraction, elevation, and depression of scapula

Question 15

Mneumonic Device for upper arm

Answer 15

Biceps brachii: Short walk to the corner, long ride on the superhighway:

Short head originates at the coracoid; long head from the supraglenoid cavity

Muscles that flex the forearm, the (Three B’s that Bend the elBow) Brachialis, Biceps, Brachioradialis

Question 16

Triceps Brachii

Answer 16

O: infraglenoid tubercle of scapula, humerus
I: olecranon process of ulna
A: extend forearm; adduct shoulder

Question 17

Opponens Pollicis OIA

Answer 17

O: trapezium, carpal ligament

I: metacarpal bone of the thumb

A: opposes thumb

Question 18

Prime mover

Answer 18

produces the most force

Question 19

Trapezius

Answer 19

Trapezoidal

Question 20

Fascia

Answer 20

Outer muscle wrapping

Question 21

Pronator Teres OIA

Answer 21

O: medial epicondyle of humerus ulnar head: coronoid process of ulna
I: radius
A: pronation of forearm, flexes elbow

Question 22

Pectoralis Major OIA

Answer 22

O: clavicle, sternum, costal cartilages, and the aponeurosis of the external oblique
I: intertubercular groove of the humerus
A: adducts and medially rotates the humerus. draws the scapula anteriorly and inferiorly.

Question 23

Palmaris Longus OIA

Answer 23

O: medial epicondyle of the humerus
I: palmar aponeurosis
A: flexes the wrist

Question 24

Latissimus Dorsi OIA

Answer 24

O: T7-L5, iliac crest and inferior 3 or 4 ribs, inferior angle of scapula
I: intertubercular groove of the humerus
A: adducts, extends and internally rotates the arm

Question 25

Intrinsic

Answer 25

muscles are contained within a region, such as the hand

Question 26

Levator

Answer 26

elevates a body part

Question 27

Digiti

Answer 27

of a digit

Question 28

Muscles of the the Anterior forearm

Answer 28

Flex/extend wrist and fingers, adduct/abduct wrist Digitorum = inserts into digits Carpi = inserts onto carpal bones Pollicis = inserts into thumb Radialis = crossing over radius Ulnaris = crossing over ulna

Question 29

Aponeurosis

Answer 29

A broad, flat tendon It may or may NOT have a bony attachment Top of skull, palm, rectus abdominus

Question 30

Retinaculum

Answer 30

Anchor tendons

Question 31

Quadriceps

Answer 31

having four heads

Question 32

Deltoid OIA

Answer 32

O: clavicle, acromion, spine of the scapula I: deltoid tuberosity of humerus A: shoulder abduction, flexion and extension

Question 33

Profundus

Answer 33

deepest