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31 Cards in this Set

  • Front
  • Back
The cutaneous innervation of the arm is supplied by what?
By the ventral primary rami of C3-T3
What does the supraclavicular nerves (C3-C4) innervate?
The skin of the upper shoulder
What innervates the skin of the brachium, antebrachium and the hand?
Brachial Plexus (C5-T1)
The Superior lateral brachial cutaneous nerve arises from what and what does it do?
Arises from the axillary nerve and supplies the skin over the deltoid muscle
The inferior lateral brachial cutaneous nerve arises from what and supplies what?
Arises from the radial nerve and supplies the skin of the lateral aspect of the lower arm
The posterior brachial cutaneous nerve arises from what and supplies what?
It arises from the radial nerve and supplies the skin of the posterior aspect
The Medial brachial cutaneous nerve arises from what and supplies what?
Arises from the medial cord of brachial plexus and supplies skin of upper medial aspect of the arm
The Medial antebrachial cutaneous nerve arises from what and supplies what?
Arises from the medial cord of the brachial plexus and supplies the skin of the lower medial and anterior aspects of the arm
What does the Intercostobrachial nerve (T2-T3) supply?
supplies skin of armpit and part of medial arm
What fascia surrounds the muscles of the arm like a sleeve?
The deep brachial fascia
What are the two fascial septa that connect the brachial fascia with the humerus?
Lateral intermuscular and medial intermuscular septum
What do the lateral and medial intermuscular septa divide the arm into?
Anterior containing flexor muscles and posterior containing extensor muscles
The Brachial fascia is continuous with what fascia?
The pectoral fascia above and the antebrachial fascia distally
Coracobrachialis muscles (anterior flexor muscle)-origin, insertion, innervation and actions?
Origin-coracoid process
insertion-medial side of mid-humeral shaft
Innervation-musculocutaneous nerve
Actions-flexes and adducts the arm
Biceps Brachii muscle-origin, insertion, innervation and actions
Origin-long head from the supraglenoid tubercle of scapula. Short head from the corocoid process
Insertions-biceps tendon into the radial tuberosity; bicepital aponeurosis blends with the deep fascia of flexor muscles in proximal forearm
Brachialis muscle-origin, insertion, innervation and action
Origin-distal 1/2 of anterior humerus
Insertion-ulnar tuberosity on the anterior aspect of the coronoid process of ulna
Innervation-musculocutaneous nerve
Action-flexes elbow
Triceps brachii-origins, insertions, innervation and action
Origin-long head from the infraglenoid tubercle of scapula. Lateral head from posterior humerus, proximal to radial (spiral) groove. Medial head from posterior humerus, distal to radial groove.
Insertion-olecranon process of ulna
Innervation-radial nerve
Action-extends elbow. It's chief function is to keep elbow extended when pushing an object
The Brachial artery is a continuation of what?
The axillary artery
Where does the brachial artery begin at?
lower border of teres major
What does the brachial artery bifurcate into?
Approximately one inch distal to the crease of the elbow, into the radial and ulnar arteries
What arteries branch off of the brachial artery?
Profuna brachii, Superior ulnar collateral artery, inferior ulnar collateral, Nutrient artery, radial collateral artery
What does the Profunda Brachii artery supply?
triceps brachii as it travels with the radial nerve. It anastomoses with the axillary artery
What does the Superior ulnar collateral artery supply?
elbow joint
What does the inferior ulnar collateral artery supply?
elbow joint
what does the nutrient artery of the humerous supply?
humerus bone
What does the radial collateral artery anastomoses with?
radial recurrent artery
The deep brachial vein runs parallel with what?
The brachial artery
Clinical note-3% of the population the ulnar artery descends superficial to the flexor muscles of the forearm. Why is this dangerous?
Someone injecting medicine into someone may mistakenly mistake it for the median cubital vein.
Clinical note-The ulnar nerve is susceptible to injury from lacerations to the medial side of the arm, just proximal to what?
Just proximal to the medial epicondyle of the humerus
If the brachial artery is ligated, how does blood get to the distal extremities?
blood reaches the ulnar and radial arteries by way of anastomotic connections between the ulnar collateral and ulnar recurrent arteries
What constitutes the arm?
From the Glenohumeral joint to the elbow joint