Anatomy- Arm And Cubital Fossa

Front 1

What are the bony landmarks on the distal half of the humerus (articulating and non-articulating surfaces and fossae)?

Back 1

Articular surfaces
1. Capitulum and Trochlea

Non-articular surfaces
1.medial and lateral epicondyles
2. medial and lateral supracondylar ridges

fossae
1.olecranon fossa
2.coronoid fossa
3.radial fossa

Front 2

What are used as attachments for intermuscular septa on the distal humerus?

Back 2

medial and lateral supracondylar ridges

Front 3

What does the lateral supracondylar ridge ascend to be?

Back 3

spiral groove

Front 4

What envelops all of the muscle in the arm?

Back 4

brachial fascia

Front 5

The brachial fascia is divided into anterior and posterior compartments by what?

Back 5

medial and lateral intermuscular septa

Front 6

What are the muscles of the anterior compartment of the arm and what innervates them?

Back 6

1.Coracobrachialis
2.biceps brachii
3. brachialis
all innervated by musculocutaneous nerve (C5,6,7) from the lateral cord of the brachial plexus

Front 7

What are the muscles of the posterior compartment of the arm and what innervates them?

Back 7

triceps brachii which is innervated by the radial nerve (C5-8, T1) from the posterior cord of the brachial plexus

Front 8

What are the attachments of the coracobrachialis?

Back 8

1.tip of coracoid process
2. 1/2 way down the humerus

Front 9

What is the function of the coracobrachialis?

Back 9

flexes the arm

Front 10

What are the attachments of the biceps brachii?

Back 10

1.short head attaches to coracoid process
2. long head attaches to supraglenoid tubercle (runs in bicipital groove)
3. both combine to attach to tuberosity of radius, and to the ulna via the bicipital aponeurosis

Front 11

What innervates the coracobrachialis?

Back 11

musculocutaneous nerve (C5,6,7)

Front 12

What innervates the biceps brachii?

Back 12

musculocutaneous nerve (C5,6,7)

Front 13

What is the function of the biceps brachii?

Back 13

1.supinates radius
2.flexes arm
3.flexes forearm

Front 14

What innervates the brachialis?

Back 14

musculocutaneous nerve (C5,6,7)

Front 15

What are the attachments of the brachialis?

Back 15

1.anterior aspect of distal 1/2 of humerus and intermuscular septa
2.anterior aspect of coroniod process of ulna

Front 16

What is the function of the brachialis?

Back 16

flexes the forearm

Front 17

What are the three heads of the triceps brachii?

Back 17

long head, medial head, and lateral head

Front 18

What are the attachments of the triceps brachii?

Back 18

1. long head attaches to infraglenoid tubercle
2. medial head attaches to posterior surface of humerus and to intermuscular septa below the spiral groove
3. lateral head attaches along a line from posterior margin of deltoid tuberosity
4. all three heads combine and attach to olecranon process of ulna

Front 19

What is the function of the triceps brachii?

Back 19

extends the elbow joint

Front 20

What innervates the triceps brachii?

Back 20

radial nerve (C5-8,T1)

Front 21

What are the borders of the cubital fossa?

Back 21

1.brachioradialis (lateral border)
2.pronator teres (medial border)

Front 22

What is contained in the cubital fossa?

Back 22

1.biceps tedon
2.brachial artery and terminal branches
3. median nerve
4. radial nerve (hiding inferior to brachioradialis

Front 23

Trace the brachial artery throughout the arm.

Back 23

1.lies anterior to biceps brachii and then the brachialis
2.divides at the neck of the radius into ulnar and radial arteries

Front 24

What are the branches of the brachial artery?

Back 24

1.deep brachial artery
2.superior ulnar collateral artery
3. inferior ulnar collateral artery
4.muscular branches
5. nutrient artery to the humerus

Front 25

Where does the deep brachial artery begin and what is its nerve companion?

Back 25

just distal to teres major and is a companion to the radial nerve

Front 26

What does the deep brachial artery communicate with via anastomoses?

Back 26

radial and ulnar arteries

Front 27

What does the musculocutaneous nerve arrise from?

Back 27

lateral cord of brachial plexus (C5,6,7)

Front 28

What muscles does the musculocutaneous nerve pierce?

Back 28

Coracobrachialis

Front 29

What muscles does the musculocutaneous nerve innervate?

Back 29

1.coracobrachialis
2.biceps brachii
3.brachialis

Front 30

At the lateral border of the biceps brachii what does the musculocutaneous nerve become?

Back 30

lateral cutaneous nerve of the forearm

Front 31

What does the ulnar nerve arrise from?

Back 31

medial cord of the brachial plexus (C7,8,T1)

Front 32

Trace the path of the ulnar nerve through the arm.

Back 32

1.runs medial to the brachial artery to middle of the arm
2. then runs posterior to the medial intermuscular septum against the medial head of the triceps brachii

Front 33

Where does the ulnar nerve run at the elbow?

Back 33

1.posterior to the medial epicondyle and into the forearm.

Front 34

What accompanies the ulnar nerve into the forearm?

Back 34

1. superior ulnar collateral artery
2.ulnar collateral nerve(branch of the radial nerve that innervates the medial head of the triceps

Front 35

What does the median nerve arrise from?

Back 35

lateral and medial cords of the brachial plexus (C5-8, T1)

Front 36

Trace the path of the median nerve through the arm.

Back 36

1.lateral and medial cords of brachial plexus unite in axilla lateral to the brachial artery
2.median nerve crosses over the artery and lies medial to it in the cubital fossa

Front 37

What does the radial nerve arrise from?

Back 37

it is a continuation of the posterior cord (C5-8, T1)

Front 38

Trace the path of the radial nerve through the arm.

Back 38

1. runs posteriorly to the axillary then brachial artery
2.runs anterior to the long head of the triceps in posterior of arm
3. runs in the spiral groove and then into the anterior arm between brachioradialis and brachialis

Front 39

The radial nerve divides into what in the cubital fossa and what are their functions?

Back 39

1.superficial radial nerve (sensory)
2. deep radial nerve (mostly motor)

Front 40

What are the cutaneous branches of the radial nerve?

Back 40

1.branches to the 3 heads of the triceps brachii
2.lower lateral cutaneous nerve of arm
3. posterior cutaneous nerve of forearm
4. branch to brachioradialis and extensor carpi radialis longus
5. branch to extensor radialis brevis and supinator