Brachium Flashcards
What are the types of brachial fascia?
- Median Intermuscular septum
- Lateral intermuscular septum
- Anterior and Posterior compartments
Which compartment is a flexor?
Anterior compartment
Which compartment is an extensor?
Posterior compartment
Characteristics of the coracobrachialis?
- Antigravity muscle (holds humeral head in the cavity and prevents it from falling out)
- Held down by transverse humeral ligament
What are the muscles of the anterior compartment?
- Coracobrachialis
- Biceps Brachii
- Brachialis
What nerve innervates…
- Coracobrachialis
- Biceps Brachii
- Brachialis
Musculocutaneous Nerve
What happens in a biceps tendon rupture?
The biceps budge up near the top
What are the muscles of the posterior compartment?
- Triceps Brachii
- Anconeous
What are the components of the brachial artery?
- Profunda brachii
- Radial
- Ulnar
- Common interossesous (anterior and posterior)
What are the proximal arteries that make up the elbow anastomoses?
- Radial Collateral Artery
- Superior Ulnar Collateral Artery
- Inferior Ulnar Collateral Artery
What are the distal arteries that make up the elbow anastomoses?
- Radial Recurrent
- Anterior ulnar recurrent
- Posterior ulnar recurrent
- Interosseous Current
What are the superficial veins of the forearm and arm?
- Cephalic
- Basilic
- Median Cubital
- Dorsal Venous Arch
- Palmar Venous Arch
Where is the cephalic vein located?
- On the thumb side
- ascends up the arm to the deltopectoral groove
Where is the basilic vein?
On the medial side (pinky side)
What is the dorsal venous arch?
Where the veins merge on the top of the hand (anatomical posterior position)
What is the palmar venous arch?
Where the veins merge on the palm of your hand
T/F- the brachial veins are paired?
True- they run along the brachial artery and they are all in a fascia bundle together
Where does the brachial vein begin?
Where the radial and ulnar veins unite
Where does the brachial vein end?
Where the basilic and brachial vein turn into the axillary vein
What muscles does the axillary nerve innervate?
-Deltoid
-Teres Minor
and the skin too
Where is the axillary nerve found?
Emerging from the quadrangular space
What muscle does the radial nerve innervate?
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
What does the musculocutaneous nerve innervate?
- All muscles in the anterior compartment of the arm
- Lateral antebrachial cutaneous skin over the lateral foreaem
T/F- The median and ulnar nerves do not innervate the muscles of the brachium?
True
Do the median and ulnar nerves innervate the skin on the brachium?
No
This is the unilateral area of the skin that is innervated by the fibers of a single spinal nerve
Dermatome
Which side of the dermatomes are the thumbs on?
The cranial side
Where do most peripheral nerves branch from?
The brachial plexus
Do the nerves contain fibers from severa spinal roots?
Yes
How does a central injury present?
- Symptoms in the dermatome
- The nerve is injured before it enters the plexus
- Flaccid paralysis from the injury down
How does a peripheral injury present?
-Symptoms are only from that injury down to the hand
