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