Brachial Plexus - Part 2 Flashcards
The suprascapular nerve contains fibers from what?
C5 and C6
The suprascapular nerve supplies what two muscles?
supraspinatus
infraspinatus
The supraspinatus and infraspinatus are part of what?
The rotator cuff
The nerve to the subclavius contains fibers from what?
C5 and C6
The nerve to the subclavius supplies what?
subclavius
Which nerves are part of the supraclavicular part of the brachial plexus?
Dorsal scapular nerve
Long thoracic nerve
Suprascapular nerve
Nerve to the subclavius
The lateral pectoral nerve branches off of what?
The lateral cord of the brachial plexus
The lateral pectoral nerve contains fibers from what?
C5,C6, C7
The lateral pectoral nerve supplies what muscle?
Pectorals major
The pectorals major is supplied by the lateral pectoral nerve but will also receive innervation from what other nerve?
Medial pectoral nerve
The musculocutaneous nerve is on of two ______ branches of the ____?
Terminal
Lateral cord
The musculocutaneous nerve contains fibers from which nerves?
C5, C6, C7
The musculocutaneous nerve supplies 3 (or 4) muscles of the anterior arm. They are?
coracobrachialis
Biceps brachii (both long and short heads)
brachialis
Why would you say the musculocutaneous is supplying 4 muscles?
If you include the two heads of biceps brachii as two muscles
The musculocutaneous nerve pierces what muscle?
coracobrachialis
After piercing the coracobrachialis, the musculocutaneous nerve continues between what? To become what nerve?
Biceps brachii and brachialis
Lateral cutaneous nerve of the forearm
The lateral cutaneous nerve of the forearm supplies what?
Skin over lateral aspect of the forearm
Does the lateral cutaneous nerve of the forearm supply the hand?
NO
The other terminal branch (other than musculocutaneous) of the lateral cord contributes to which nerve?
Median nerve
What 4 nerves are branches off the medical cord of the brachial plexus?
Medial pectoral nerve
Medial cutaneous nerve of the arm
Medial cutaneous nerve of the forearm
ulnar nerve
The medial pectoral nerve contains fibers from what nerves?
C8 and T1
The medial pectoral nerve supplies what two muscles?
Pectoralis major
Pectoralis minor
The medial cutaneous nerve of the arm contains fibers from what?
C8 and T1
The medial cutaneous nerve of the arm ramifies (branches) where?
In the axilla
The medical cutaneous nerve of the arm supplies what?
Skin of medial arm between axilla and elbow
The medial cutaneous nerve of the arm receives some fibers from what nerve? How?
T2
Through a communication w/the intercostobrachial nerve
The medial cutaneous nerve of the forearm contains fibers from what nerve?
C8 and T1
The medial cutaneous nerve of the forearm supplies what?
Skin over biceps brachii and
Skin over anterior and medial aspects of the forearms distal to the wrist
This nerve is one of two terminal branches of the medial cord (along with median nerve).
Ulnar nerve
Ulnar nerve contains fibers from what nerves?
C8, T1, and sometimes C7
The ulnar nerve travels medial to what? Within what?
Brachial artery
Medial bicipital sulcus (furrow)
Does the ulnar nerve give off branches in the arm?
NO
The ulnar nerve crossed over the posterior side of what? In what?
The medial epicondyle
Sulcus for the ulnar nerve
(easily palpated here)
What is the ulnar nerve called?
Funny bone
The ulnar nerve continues into the forearm between what?
The two heads of the flexor carpi ulnaris
The ulnar nerve innervates two muscles in the forearm.
Flexor carpi ulnaris
MEDIAL half of flexor digitorum profundus
The ulnar nerve gives off what two branches in the forearm?
Dorsal branch
Palmar branch
The dorsal branch of the ulnar nerve supplies what?
Skin on the ulnar side of the posterior hand
The palmar branch of the ulnar nerve supplies what?
Skin over the hypothenar eminence
The ulnar nerve traveling to the wrist travels deep to what?
Flexor carpi ulnaris
