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27 Cards in this Set
- Front
- Back
Anterior compartment of the arm |
Biceps brachii Brachialis Corocobrachialis *All are innervated by the musculocutaneous nerve! |
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Coracobrachialis |
Proximal Attachment- corocoid process Distal Attachment- middle third of the medial humerus Actions- flexes and adducts the arm at the glenohumoral joint |
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Briceps Brachii |
Proximal Attachment-long head-superglenoid tubercle. Short head- corocoid process Distal attachment- radial tuberosity and fascia of the forearm Actions- glenohumeral and elbow flexor, supinator of the forearm, especially when flexed. |
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Brachialis |
Proximal Attachment- Distal half of anterior humerus Distal Attachment-corocoid process and tuberosity of ulna. Action-flexion at the elbow joint |
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What reflex is being tested? |
Bicipital reflex. Patients limb is extended and relaxed, physicians thumb is placed over the biceps tendon and tapped with the reflex hammer. Normal response is a momentary contraction that confirms the integrity of the C6 spinal segment. |
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What is ruptured? |
Long head of the biceps brachii. prominant bulge is called the "popeye sign" |
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Path of the musculocutaneous nerve |
1. Branches from the lateral cord of the brachial plexus. 2. Passes through the coracobrachialis 3.passes between biceps and brachialis 4. emerges at lateral biceps 5. pierces fascia and becomes the lateral cutaneous nerve of the forearm |
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Posterior compartment of the arm |
Tricepts Brachii Anconeous *Both innervated by the Radial Nerve |
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Triceps Brachii |
Proximal Attachments- Long head- infraglenoid fossa. Medial head- posterior humerus Distal Attachments- common tendon at olecranon Actions- Extends, helps adduct. |
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Anconeus |
Proximal Attachment- lateral epichondyle Distal Attachment-lateral olecrannon Acions- slight extensor, stabilizes elbow, adbucts during pronation. |
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Path of the radial nerve |
originates from the posterior cord of the brachial plexus, enters the arm inferior to the teres major alongside the deep artery. Lies int he radial groove of the humerus. |
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What injury might "wrist drop" signify? |
Injury to the radial nerve results in partial tricepts paralysis. Most likely only the medial head of the triceps will be affected, extensers of the fingers and wrist is impaired. Sensation will also be impaired. |
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Arteries of the arm |
The main supply is the Brachial Artery (which runs from the inferior teres major to the cubital fossa) It branches into the deep artery (which supplies the posterior compartment)as well as the radial and ulnar collaterals. |
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Veins of the arm |
There are both deep and superficial veins. The superficial vein begins in the dorsum of the hand via the dorsal venous network, while the palm is drained from the deep vein. |
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Boundaries of the cubital fossa |
Superior-imaginary line connecting condyles of the humerus Medial- pronator teres Lateral-brachioradiales floor-brachialis supinator roof- deep fascia and bicipital aponeuresis |
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Contents of the cubital fossa |
Brachial artery and radial and ulnar branches. Radial nerve (divides into deep and superficial) Companion veins. Median nerve |
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Label |
Note fat pads. |
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1. Radial collateral ligament 2. Ulnar collateral ligament 3. Annular ligament |
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Ulnar nerve injury |
The ulnar nerve passes between the medial epichondyle of the humerus and the olcrannon of the ulna. It then passes through the carpal tunnel. It is vulnerable to repetitive motion and compression injury leading to pain, inflammation, and impaired motor function. |
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comic relief! |
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coracobrachialis |
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Biceps brachii |
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Brachialis |
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triceps brachii |
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Aconeus |
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1.pectoralis major 2. deltoid 3. triceps brachii 4. brachialis 5. biceps brachii |
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1. deltoid 2. triceps brachii 3. brachialis 4. biceps brachii 5. brachioradialis |