Unit One Brachial Nerves Flashcards
Musculocutaneous nerve originates from
C5-C7
Musculocutaneous nerve pierces what
Coracobrachialis (medial to lateral) and emerges on the anterior surface
Musculocutaneous nerve runs between
Brachialis and biceps muscle bodies
Musculocutaneous nerve pierces what fascia
Brachial
After piercing fascia, the musculocutaneous nerve runs lateral on forearm with what other vessel
Cephalic vein
Musculocutaneous nerve innervates what muscles
Biceps brachii, coracobrachialis and brachialis (muscles of the anterior compartment of arm)
Musculocutaneous nerve is sensory to
Lateral antebrachium
Median nerve originates from
C6-C8 and T1
Median nerve is formed by
Medial and lateral branches of the lateral and medial cord
Median nerve forms anterior to what vessel
Axillary artery
The median nerve runs what of brachial artery
Lateral surface
Where on arm does the median nerve crosses medial side and comes in contact with brachialis muscle
Mid arm
The median nerve enters what fossa deep to bicipital aponeuroses and median cubital vein
Cubital fossa
Does the median nerve have branches in the arm
No
Median nerve is a major player for what muscles
Muscles in the forearm and hand
Median nerve is sensory to
In the hand the radial 2/3rds of palm and dorsum and the 2nd, 3rd and radial half of the 4th distal to the interphalangeal joint
The ulnar nerve originates from
C8 and T1
The ulnar nerve is a continuation of
Medial cord
The ulnar nerve runs anterior to the insertion of what muscle
Teres major and long head of triceps on medial aspect of axillary/ brachial artery
What nerves run with the ulnar nerve and form proximal to the ulnar nerve
Medial brachial and medial antebrachial cutaneous nerves
Does the ulnar nerve innervate muscles in the arm
No
The ulnar nerve innervates what type of muscles
Forearm and hand
Sensory of ulnar nerve
Medial surface of the arm and forearm
Radial nerve originates from
C5-C8
Radial nerve formed by
Posterior cord
Radial nerve position compared to axillary artery
Posterior to axillary
Radial nerve begins
Posterior to axillary artery, medial to humerus and anterior to the subscapularis muscle
Radial nerve crosses what to run anterior to the long head of triceps
Latissimus dorsi
Radial nerve passes through what along with profunda brachii and axillary artery
Triangular interval
Radial nerve enters what of the humerus with profunda
Spiral groove
Before the radial nerve enters the spiral groove of humerus, it innervates what
Long and lateral heads of triceps
In the spiral groove, the radial nerve it innervates
Medial head of the triceps and anconeus, posterior arm and forearm
After radial nerve exits groove it pierces what and then runs between
Lateral intermuscular septum, brachialis and brachioradialis
When the radial nerve reaches the cubital fossa, it splits into
Deep muscular and superficial branch
Sensory of radial nerve
Lateral dorsum of hand and proximal 1/2 of the 2nd and 3rd digits
Axillary nerve originates from
C5 and C6
Axillary nerve is a terminal branch of
Posterior cord
Location of axillary nerve to axillary artery
Posterior to axillary artery
After the axillary nerve branches from posterior cord is passes laterally through
Quadrangular space
Axillary nerve enters into quadrangular space with what artery
Posterior circumflex humeral artery
The axillary nerve sends a branch to what when it circles the surgical neck
Superior lateral brachium (over body of deltoid muscle)
Where does axillary nerve terminate
Teres minor, deltoid and a sensory branch to the glenohumeral joint
Sensory of axillary nerve
Lateral aspect of the superior brachium (deltoid)
