the arm

Question 1

Anterior Arm Compartment:

Answer 1

Superficial: Pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris

Intermediate: Flexor Digitorum Superficialis

Deep: Flexor Digitorum produndus, pronator quadratus, flexor pollicus longus

Question 2

Posterior Arm compartment:

Answer 2

Superficial: Brachioradialis, Anconeus, Extensor Carpi Radialis longus, Extensor Carpi Radialis Brevis, Extensor Carpi ulnaris, extensor digitorum, extensor digiti minimi

Deep: supinator, abbductor pollicuz longus, extensor indices, extensor pollicuz brevis, extensor pollicus longus

Question 3

parts of the distal humerus

Answer 3

two articular condyles articulation with the proximal radius and ulna
capitulum
head of radius
trochela
medial and lateral epicondyles
medial and lateral supracondylar ridges
coronoid fossa (anterior)
olecranon fossa (posterior)

Question 4

parts of radius

Answer 4

head
annular ligament
neck
radial tubercle
bicep brachii

Question 5

parts of ulna

Answer 5

trochlear notch
olecranon process
coronoid process
tuberosity of the ulna
radial notch

Question 6

does the ulna or radius rotate

Answer 6

radius

Question 7

what is the function of the annular ligament

Answer 7

holds radius into ulna and permits rotation

Question 8

compartmentalization of the arm

Answer 8

two compartments - anterior and posterior

Question 9

what does the anterior compartment house in the arm

Answer 9

flexors

Question 10

what does the posterior compartment house in the arm

Answer 10

extensors

Question 11

Muscles located within the anterior compartment, how many muscles, what is innervation

Answer 11

3 total, biceps and brachialis (insert into forearm), while a third muscle, coracobrachials (inserts into humerus)

Innervated by musculocutaneous nerve

Question 12

Coracobrachialis origin/insertion, function, innervation

Answer 12

Origin- tip of coracoid process
Insertion - halfway down medial side of the humerus
Function- adductor
Innervation - musculocutaneous nerve

Question 13

Brachialis origin/insertion, function, innervation

Answer 13

Origin- flat surface of distal humerus
Insertion- tubercle of the ulna
Function- powerful elbow flexor
Innervation- musculocutaneous nerve

Question 14

Biceps brachialii origin/insertion, function, innervation

Answer 14

Origin- two heads, two origins, long head - supraglenoid tubercle, short head - coracoid process
Insertion - radial tubercle
Function - flexor
Innervation - musculocutaneous

Question 15

How many muscles occupy the posterior compartment of the arm

Answer 15

One, triceps

Question 16

Tricep heads

Answer 16

Long head, medial head, lateral head

Question 17

Long head of bicep origin/insertion, function, innervation

Answer 17

Origin- small tubercle under the glenoid fossa (infraglenid tubercle)
Insertion - olecranon of ulna
Function- extensor of elblow joint
Innervation - radial nerve

Question 18

Medial head of bicep origin/insertion, function, innervation

Answer 18

Origin- deep, lower part of shaft of humerus
Insertion- olecranon of ulna
Function- extensor of elbow joint
Innervation - radial nerve

Question 19

Lateral head of tricep origin/insertion, function, innervation

Answer 19

Origin- proximal humerus
Insertion- olecranon of ulna
Function- elbow extensor
Innervation- radial nerve

Question 20

Proximal radioulnar joint classification

Answer 20

Synovial, uniaxial, hinge

Question 21

Proximal radioulnar movements

Answer 21

Flexion (bicep and brachialis) and extension (triceps)

Question 22

Proximal radioulnar bones involved

Answer 22

Proximal head of radius, capitulum of humerus, trochlear notch of ulna, trochlea of the humerus

Question 23

Proximal radioulnar muscles acting on joint

Answer 23

Brachialis, biceps, triceps

Question 24

how many carpal (wrist) bones are there, name

Answer 24

8, pisiform, triquetral, lunate, scaphoid, hamate, capitate, trapezoid, trapezium

Question 25

proximal wrist bones

Answer 25

pisiform, triquetral, lunate, scaphoid

Question 26

distal wrist bones

Answer 26

hamate, capitate, trapezoid