Brachial Plexus
Name the divisions of the brachial plexus in order from proximal to distal
Roots, Trunks, Division, Cords, Branches
How many terminal branches are there and what are their names?
4
Musculocutaneous, Ulnar, Median, Radial
The majority of the branches off of which artery supply the upper limbs?
Subclavian Artery
What is the name of the vein that is commonly used for drawing blood?
Median cubital vein
How many nerves(not including primary nerves) continue distally from the cords? What are their names?
8
Lateral Pectoral, Medial Pectoral, Medial Brachial Cutaneous, Medial Antebrachial Cutaneous, Upper Subscapularis, Thoracodorsal, Lower Subscapularis, Axillary Nerve
What ventral rami is the brachial plexus derived from?
C5-T1
Which two nerves have no muscular nor cutaneous innervation while coursing through the neurovascular compartment?
Ulnar and Median nerves
How many named branches of the axillary artery are there?
6
The junction of the brachial and basilic veins form which vein?
Axillary Vein
What are the contents and boundaries of the cubital fossa?
Contents: Radial n. and branches, tendon of biceps brachii, brachial artery, median n.
Boundaries: Brachioradialis(lateral), pronator teres(medial), imaginary line between epicondyles of the humerus(superior)
Trunks are found in the ____, while cords are found in the ____.
Neck
Axilla
The nerve that gives off a branch in the cubital fossa, and passes deep to the arch of the flexor digitorum superficialis with the ulnar artery provides cutaneous innervation to the medial/lateral 3.5/1.5 digits anteriorly/posteriorly and their tips anteriorly/posteriorly.
Lateral
3.5
Anteriorly
Posteriorly
The artery that terminates within the cubital fossa divides into which 2 terminal branches?
Radial and Ulnar arteries
When deep veins are paired with the accompanying artery this is called?
Venae comitantes
How many carpal bones are there? How many rows and what are they? What are the names of the bones from lateral to medial?
8 bones
2 Rows: Proximal and Distal
P: Scaphoid, Lunate, Triquetrum, Pisiform
D: Trapezium, Trapezoid, Capitate, Hamate
What space does the nerve that innervates teres minor and deltoid pass through?
Quadrangular space of the shoulder
The ____ branch of the radial nerve changes its name to ____ ____ ____ after it passes the superior border of the supinator muscle. How many muscles of the forearm are innervated by the combination of these two nerves?
Deep
Posterior Interosseous Nerve(PIN)
9
How many branches come off of the subclavian artery and what are their names?
4
Vertebral, Internal Mammary(Internal Thoracic), Thyrocervical, Costocervical Artery
The vein that originates as a continuation of the lateral side of the dorsal venous arch enters the deltopectoral groove between which muscles on its way to join with which vein?
Deltoid and pectoralis major muscles
Axillary vein
What structure surrounds the eight tendons of the flexor digitorum superficialis and flexor digitorum profundus? How many are there? Does it pass through the carpal canal?
Ulnar bursa
2
Yes!
True/False. The muscle(s) innervated by the nerve derived from the posterior cord and proximal to the thoracodorsal nerve are rotator cuff muscle(s).
True
Cutaneous innervation of the hand is supplied by branches off 3 of the 4 terminal branches, the nerve that doesn’t lead to cutaneous supply of the hand pierces and innervates which muscle?
Coracobrachialis
The artery that courses alongside its corresponding nerve through Guyon’s canal terminates and does what?
Forms the superficial palmar arch
Trace the venous return of the distal portion of the middle phalanx(palmar side) on the lateral side of the arm, back to the right atrium.
Palmar digital veins, intercapitular veins, dorsal digital veins, dorsal metacarpal veins, dorsal venous arch, cephalic vein, axillary vein, subclavian vein, right atrium
If a patient were to be experiencing hypoesthesia in the skin of the posterior aspect of digit 5, what would be the nerve that is being directly affected? Starting from that nerve, trace the pathway back to the ventral rami that it originates from.
Dorsal Branch of the Ulnar Nerve
Dorsal Branch of the Ulnar Nerve, Ulnar Nerve, Medial Cord, Anterior Division of Lower Trunk, Lower Trunk, C8-T1