Arm And Cubital Fossa

Question 1

Short and Long head of Biceps origin

Answer 1

• Short head: Coracoid

- Long head: Supraglenoid tubercule

Question 2

Long head of Biceps runs through

Answer 2

Intertubercular goove

Question 3

Insertion of the Biceps

Answer 3

• Radial Tuberosity

- Bicipital aponeurosis

Question 4

Actions of Biceps at Elbow and Shoulder

Answer 4

• Elbow: flexion and some supination

- Shoulder: Flexion (short head), abduction (long head)

Question 5

Coracobracialis origin and insertion

Answer 5

• Origin: Coracoid process

- Insertion: humerus (medially)

Question 6

Actions of coracobracialis at the shoulder

Answer 6

-Flexion and Adduction

Question 7

Bicipital aponeurosis is continuous with

Answer 7

Fascia of forearm, superficial to all muscles

Question 8

Brachialis origin and insertion

Answer 8

• Origin: anterior surface of humerus

- Insertion: ulna, tuberosity, coronoid process

Question 9

Actions of Brachialis

Answer 9

-Flexion

Question 10

Innervation of Biceps, Brachialis, and coracobrachialis

Answer 10

• Musculocutaneous N (C5-C7)

- Some of the radial nerve innervates the Brachialis (also C5-C7)

Question 11

Triceps Brachii Long, Lateral and Medial head origins and insertion

Answer 11

• Long: infraglenoid tuberucle, olecranon
• Lateral head: superior aspect of humerus
• Medial head: inferior deep to lateral head

-All insert on the olecranon

Question 12

Innervation of Triceps

Answer 12

-Radial Nerve, C6-C8, mainly C7 and C8 tho

Question 13

Anconeus Origin and Insertion

Answer 13

• Origin: lateral epicondyle

- Insertion: olecranon

Question 14

Long head of Biceps vs Long head of Triceps

Answer 14

• Biceps: Supraglenoid Tubercle

- Triceps: Infraglenoid Tubercle

Question 15

Muculocutaneous N pierces which muscle

Answer 15

Coracobrachialis

Question 16

Anterior compartment vs posterior innervation

Answer 16

• Anterior: musculocutaneous

- Posterior: Radial (triceps, anconeus)

Question 17

Biceps reflex test spinal levels

Answer 17

C5-C6

Question 18

Triceps reflex test spinal level

Answer 18

C7

Question 19

Anterior vs posterior compartments are partitioned from each other by

Answer 19

Fascial septa

Question 20

Compartment syndromes

Answer 20

Increases in mass/volume/pressure within one compartment can rapidly compress or damage structures within that compartment

-Ex: edema, bleeding

Question 21

Clinical problems associated with compartments

Answer 21

1.) structures can become entrapped and dysfunctional at point of passage between compartment

Question 22

Which compartment does the brachial artery and profunda brachii pass through

Answer 22

Brachial: Anterior

Profunda Brachii: posterior

Question 23

Terminal nerves travel through which compartment

Answer 23

Anterior compartment

Question 24

Ulnar nerve travels through which compartment

Answer 24

First the anterior, then transitions to posterior compartment

Travels posterior to medial epicondyle

Question 25

Ulnar artery gives rise to

Answer 25

Common interosseus artery which bifurcated into anterior and posterior interosseous arteries

Question 26

Artery and nerve passing through cubital fossa

Answer 26

- Brachial Artery - Median N - Median Antebrachial Cutaneous N

Question 27

Boundaries of the Cubital fossa

Answer 27

- Lateral: brachioradialis - Medial: Pronator teres - Superior: biceps - Superficial: Bicipital aponeurosis - Deepest: supinator

Question 28

Main supination and pronation muscles

Answer 28

- Supinator | - Pronator teres and Pronator quadratus

Question 29

Innervation of supinator

Answer 29

Radial n

Question 30

Inn of Pronator teres and quadratus

Answer 30

Median N

Question 31

Median cubital vein connects which veins

Answer 31

Cephalic and Basilic

Question 32

Natural variations between median Cubital Vein

Answer 32

Sometimes, MCV is absent and the intermediate (median) antebrachial vein and drains to both the Cephalic and basilic v