Arm

Question 1

What parts of the distal humerus articulate with radius and ulna?

Answer 1

capitulum and trochlea

Question 2

What are the three bones that articulate in the elbow joint?

Answer 2

1. humerus
2. radius
3. ulna

Question 3

the proximal end of the ____ is wide while the proximal end of the ____ is narrow

Answer 3

ulna, radius

Question 4

what holds together the radius and ulna

Answer 4

interosseous membrane

Question 5

what part of the ulna articulates with the humerus - which part of the humerus

Answer 5

olecranon and coronoid process - articulates with trochleaw

Question 6

what type of joint is the elbow joint

Answer 6

hinge

Question 7

what are the anterior muscles that move the arm

Answer 7

1. pectoralis major
2. coracobrachialis

Question 8

what are the posterior muscles that move the arm

Answer 8

1. teres major
2. latissimus dorsi

Question 9

what are the anterior muscles that move the forearm

Answer 9

1. biceps brachii
2. brachialis
3. coracobrachialis

Question 10

what are the posterior muscles that move the forearm

Answer 10

triceps brachii

Question 11

pectoralis major origin

Answer 11

clavicular head: medial half of clavicle
sternocostal head: sternum, superior 6 costal cartilages, aponeurosis of exernal oblique

Question 12

pectoralis major insertion

Answer 12

lateral lip of intertubercular groove of humerus

Question 13

pectoralis major action

Answer 13

flexion of arm (at shoulder joint), adduction, medial rotation of shoulder

Question 14

pectoralis major innervation

Answer 14

lateral and medial pectoral nerves

Question 15

coracobrachialis origin

Answer 15

coracoid process of scapula

Question 16

coracobrachialis insertion

Answer 16

middle 1/3 of medial humerus

Question 17

coracobrachialis action

Answer 17

flexes and adducts arm

Question 18

coracobrachialis innervation

Answer 18

musculocutaneus nerve (C5 C6 C7)

Question 19

teres major origin

Answer 19

dorsal surface of inferior angle of scapula

Question 20

teres major insertion

Answer 20

intertubercular groove of humerus (anterior side)

Question 21

teres major action

Answer 21

extends, adducts, and medially rotates arm

Question 22

teres major innervation

Answer 22

lower subscapular nerve (C6 C7)

Question 23

latissimus dorsi origin

Answer 23

picks up where trapezius ends, all the way down to pelvis

spinous processes of T7-T12, thoracolumbar fascia, iliac crest, and inferior 3-4 ribs

Question 24

latissimus dorsi insertion

Answer 24

intertubercular groove of humerus

Question 25

latissimus dorsi action

Answer 25

extends, adducts and medially rotates shoulder

Question 26

lattisimus dorsi innervation

Answer 26

thoracodorsal nerve

Question 27

the origin of which two muscles overlap between spinous processes of T6-12

Answer 27

trapezius and latissimus dorsi

Question 28

how many sets of fibers does the deltoid muscle have

Answer 28

3 - anterior, middle, and posterior

Question 29

deltoid origin

Answer 29

lateral 1/3 of clavicle, acromium, and spine of scapula

Question 30

deltoid insertion

Answer 30

deltoid tuberosity of humerus

Question 31

deltoid action

Answer 31

anterior fibers: flexes and medial rotates arm middle fibers: abduct arm posterior fibers: extends and laterally rotates arm

Question 32

deltoid innervation

Answer 32

axillary nerve

Question 33

what creates compartments of the limbs?

Answer 33

dense, fibrous connective tissue

Question 34

biceps brachii origin

Answer 34

short head: coracoid process of scapula long head: supraglenoid tubercle of scapula

Question 35

biceps brachii insertion

Answer 35

tuberosity of radius and bicipital aponeurosis of forearm (ulna)

Question 36

biceps brachii action

Answer 36

supinates forearm and flexes elbow joint (can also help with shoulder flexion)

Question 37

where is the brachialis in relation to biceps brachii

Answer 37

deep

Question 38

brachialis origin

Answer 38

distal half of anterior surface of humerus

Question 39

brachialis insertion

Answer 39

coronoid process and tuberosity of ulna

Question 40

brachialis action

Answer 40

major flexor of forearm - flexes forearm in all positions

Question 41

brachialis innervation

Answer 41

musculocutaneous nerve (and radial nerve)

Question 42

triceps brachii origin

Answer 42

long head: infraglenoid tubercle of scapula medial head: posterior surface of humerus, below radial groove lateral head: posterior surface of humerus, above radial groove

Question 43

which head(s) of the triceps brachii cross both the shoulder and elbow joints

Answer 43

long head (medial and lateral only cross elbow joint)

Question 44

triceps brachii insertion

Answer 44

proximal end of olecranon process (of ulna) and forearm fascia

Question 45

triceps brachii action

Answer 45

major extensor of forearm long head steadies head of abducted humerus

Question 46

triceps brachii innervation

Answer 46

radial nerve