week 5.1 course notes

Question 1

how many compartments are in the arm, and what muscles are in which compartment

Answer 1

1. three in the anterior, biceps brachii, coracobrachialis, brachialis
2. one in external compartment, the triceps brachii
3. one that is exterior, anconeous

Question 2

OINA Biceps brachii

Answer 2

O: LH supraglenoid tubercle, SH coracoid process scapula.
I: tuberosity of the radius and the fascia of forearm via the bicipital aponeurosis
N: MSCK nerve
A: flex and supinate the arm

Question 3

Coracobrachialis OINA

Answer 3

O: tip of coracoid process
I: middle third of the medial surface of the humerus
N: MSCK nerve
A: flex and ADD arm

Question 4

Brachialis OINA

Answer 4

O: distal half of the anterior surface of the humerus
I: coronoid process and tuberosity of the ulna
N: MSCK nerve
A: flexes forearm

Question 5

Triceps OINA

Answer 5

O: LH: infraglenoid tubercle
LAT: posterior surface of the humerus, superior to radial groove
MED: posterior surface of the humerus, inferior to the radial, spiral groove
I: proximal end of olecranon of the ulna and fascia of forearm
N: radial nerve
A: extends forearm (LH extends the arm)

Question 6

Anconeous OINA

Answer 6

O: lateral epicondyle of the humerus
I: lateral surface of the olecranon and superior part of the posterior surface of the ulna
N: radial nerve
A: extend forearm, stabilize elbow and ABD ulna during pronation

Question 7

the musculocutaneous nerve arises from the ___ cord of the plexus and supplies…

Answer 7

lateral, supplies the anterior compartment of the arm and cutaneous innervation to lateral forearm giving rise to lateral cutaneous nerve of forearm

Question 8

the radial nerve arises from the ___ cord of the plexus, and it supplies the

Answer 8

posterior cord, supplies the posterior arm and large cutaneous regions of arm.

Question 9

does the median nerve supply sensory or motor to the arm. which never is similar to this

Answer 9

no, just passes through just like the ulna.

Question 10

the profunda brachii artery travels with the ___ nerve, to supply what compartment

Answer 10

radial, posterior

Question 11

the brachial artery is the continuation of the ___ artery, when it travels distal to what structure

Answer 11

axillary artery, distal to the inferior border of the teres major

Question 12

where are the cephalic and basilic veins

Answer 12

cephalic is lateral, and the basilic is medial.

Question 13

which superficial vein empties into the axillary vein near the deltopectoral triangle

Answer 13

cephalic

Question 14

the basilic vein will enter the brachial fascia at the middle of the arm to join with the ___ and become the axillary vein

Answer 14

brachial vein

Question 15

the brachial vein merges proximally with the basilic vein to form the ___

Answer 15

axillary vein

Question 16

boundaries of the cubital fossa

Answer 16

superior: imaginary lines between epicondyles
lateral: brachioradialis
medial: pronator teres
floor: brachialis and supinator
roof: cubital fossa

Question 17

what are the superficial layer contents of the cubital fossa

Answer 17

basilic, cephalic, median cubital vein, bicipital aponeurosis

Question 18

what are the deep layer contents of the cubital fossa (medial to lateral)

Answer 18

median nerve, brachial vein and artery, brachial artery (dividing into radial and ulnar arteries), tendon of biceps, and radial nerve with superficial and deep branches