Brachium

Question 1

What are the types of brachial fascia?

Answer 1

• Median Intermuscular septum
• Lateral intermuscular septum
• Anterior and Posterior compartments

Question 2

Which compartment is a flexor?

Answer 2

Anterior compartment

Question 3

Which compartment is an extensor?

Answer 3

Posterior compartment

Question 4

Characteristics of the coracobrachialis?

Answer 4

• Antigravity muscle (holds humeral head in the cavity and prevents it from falling out)
• Held down by transverse humeral ligament

Question 5

What are the muscles of the anterior compartment?

Answer 5

• Coracobrachialis
• Biceps Brachii
• Brachialis

Question 6

What nerve innervates…

• Coracobrachialis
• Biceps Brachii
• Brachialis

Answer 6

Musculocutaneous Nerve

Question 7

What happens in a biceps tendon rupture?

Answer 7

The biceps budge up near the top

Question 8

What are the muscles of the posterior compartment?

Answer 8

• Triceps Brachii

- Anconeous

Question 9

What are the components of the brachial artery?

Answer 9

• Profunda brachii
• Radial
• Ulnar
• Common interossesous (anterior and posterior)

Question 10

What are the proximal arteries that make up the elbow anastomoses?

Answer 10

• Radial Collateral Artery
• Superior Ulnar Collateral Artery
• Inferior Ulnar Collateral Artery

Question 11

What are the distal arteries that make up the elbow anastomoses?

Answer 11

• Radial Recurrent
• Anterior ulnar recurrent
• Posterior ulnar recurrent
• Interosseous Current

Question 12

What are the superficial veins of the forearm and arm?

Answer 12

• Cephalic
• Basilic
• Median Cubital
• Dorsal Venous Arch
• Palmar Venous Arch

Question 13

Where is the cephalic vein located?

Answer 13

• On the thumb side

- ascends up the arm to the deltopectoral groove

Question 14

Where is the basilic vein?

Answer 14

On the medial side (pinky side)

Question 15

What is the dorsal venous arch?

Answer 15

Where the veins merge on the top of the hand (anatomical posterior position)

Question 16

What is the palmar venous arch?

Answer 16

Where the veins merge on the palm of your hand

Question 17

T/F- the brachial veins are paired?

Answer 17

True- they run along the brachial artery and they are all in a fascia bundle together

Question 18

Where does the brachial vein begin?

Answer 18

Where the radial and ulnar veins unite

Question 19

Where does the brachial vein end?

Answer 19

Where the basilic and brachial vein turn into the axillary vein

Question 20

What muscles does the axillary nerve innervate?

Answer 20

-Deltoid
-Teres Minor
and the skin too

Question 21

Where is the axillary nerve found?

Answer 21

Emerging from the quadrangular space

Question 22

What muscle does the radial nerve innervate?

Answer 22

Triceps and the muscles of the posterior arm and the forearm

• no muscle innervation to the hand
• Skin over the posterior arm, forearm, and hand

Question 23

What does the musculocutaneous nerve innervate?

Answer 23

• All muscles in the anterior compartment of the arm

- Lateral antebrachial cutaneous skin over the lateral foreaem

Question 24

T/F- The median and ulnar nerves do not innervate the muscles of the brachium?

Answer 24

True

Question 25

Do the median and ulnar nerves innervate the skin on the brachium?

Answer 25

No

Question 26

This is the unilateral area of the skin that is innervated by the fibers of a single spinal nerve

Answer 26

Dermatome

Question 27

Which side of the dermatomes are the thumbs on?

Answer 27

The cranial side

Question 28

Where do most peripheral nerves branch from?

Answer 28

The brachial plexus

Question 29

Do the nerves contain fibers from severa spinal roots?

Answer 29

Yes

Question 30

How does a central injury present?

Answer 30

• Symptoms in the dermatome
• The nerve is injured before it enters the plexus
• Flaccid paralysis from the injury down

Question 31

How does a peripheral injury present?

Answer 31

-Symptoms are only from that injury down to the hand