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Upper Limb - quiz
Stern quiz - upper limb
| Question | Answer |
|---|---|
| Nerve at the posterior surface of the medial epicondyle of humerus? | ulnar |
| Nerve on the posterior surface of the humeral shaft? | radial |
| Artery on the posterior surface of the humeral shaft | profunda brachii |
| Nerve most closely associated with the surgical neck of the humerus | axillary |
| Artery associated with the axillary nerve | posterior circumflex humeral |
| What muscles rotate the scapula and move the glenoid fossa more superiorly? | trapezius and serratus anterior |
| What innervates the muscles that rotate the scapula and move the glenoid fossa more superiorly | accessory nerve (CN XI) - trapezius long thoracic (C5-7) - serratus anterior |
| winging of the scapula? | caused by paralysis of trapezius or serratus anterior ... test which muscle by asking the patient to activate it. |
| Which muscles supinate the forearm? | biceps brachii and supinator |
| What innervates the supinators of the forearm? | musculocutaneous - biceps and deep radial - supinator |
| what muscles flex a prone forearm? | brachialis, brachioradialis, pronator teres |
| What innervates the muscles that flex a prone forearm? | musculocutaneous - brachialis deep radial - brachioradialis median - pronator teres |
| what muscles extend the wrist? | Extensor Carpi radialis longus extensor carpi radialis brevis extensor carpi ulnaris |
| What innervates the muscles that extend the wrist? | radial - Extensor Carpi radialis longus radial - extensor carpi radialis brevis deep radial - extensor carpi ulnaris |
| Paralysis of what muscle leads to a wrist deviation when trying to flex it? | flexor carpi radialis (innervated by deep radial) |
| Paralysis of what muscle leads to elbow flexion when trying to pronate the forearm? | pronator quadratus - innervated by anterior interosseus n (from median) |
| Where would you test sensory of the superficial radial n? | dorsum of hand, over 1st interosseus muscle |
| Where would you test sensory of the median n? | palm of hand, tip of index finger |
| Where would you test sensory of the ulnar nerve? | palm of hand, tip of little finger |
| What ligament prevents posterior dislocation of the humerus? | Nothing |
| What prevents distal dislocation of the humerus? | anular ligament |
| Paralysis of what nerve causes an attempt to hold a key btwn pad of thumb and side of index finger is accompanied by flexion of thumb IP joint? | ulnar n. (innervates adductor pollicus) |
| Paralysis of what nerve causes an inability to extend fingers or thumb (elbow and wrist can still be extended) | deep radial |
| Paralysis of what nerve leads to the "waiters tip" position | C5&6 |
| Why is it not possible to fully extend fingers without intrinsic digital muscles? | not possible to balance the torques at the MCP and IP joints with only the extrinsic digital muscles. |
| damage to the ulnar nerve at the wrist results in what | ring and little finger in the claw position (MCP is hyperextended and IP joint is flexed) wasting of hypothenar eminence and intercarpal spaces on dorsal side of hand. inability to abduct/adduct fingers, inability to fully extend ring and little finger |
| What nerve is on the lateral aspect of pisiform? | ulnar |
| What innervates deltoid | axillary |
| What innervates infraspinatus | suprascapular |
| What innervates teres major? | lower subscapular |
| What innervates biceps bracii | musculocutaneous |
| What innervates flexor carpi ulnaris | ulnar n |
| What innervates adductor pollicus | deep ulnar n |
| What innervates flexor digitorum superficialis | median n |
| What innervates extensor indices | radial n |
| What nerve and artery are found in the quadrangular space? | axillary n and posterior circumflex humeral a |
| What nerve and artery are found in Guyon's canal | ulnar n and a |
| What nerve and artery are found posterior to the medial picondyle of the humerus? | ulnar n |
| What nerve and artery are found in the cubital fossa | brachial artery and median n |
| What maintains stability of the proximal radioulnar joint? | anular ligament |
| which carpal bones articulate with the radius at the radiocarpal joint? | scaphoid, lunate and triquetral |
| How can you flex the elbow if the musculocutaneous nerve is damaged? | weakly through pronator teres the median nerve innervates it |
| A fracture to the neck of the radius endangers what nerve? | deep radial nerve (causes paralysis of extensor digitorum, extensor indices, extensor carpi ulnaris) |
| Erb-duchenne causes paralysis of what muscles? | supraspinatus, infraspinatus, biceps brachii and brachialis |
| What innervates triceps brachii? | radial n |
| What innervates coracobrachialis? | musculocutaneous |
| What innervates clavicular head of pectoralis major | lateral pectoral nerve |
| What innervates extensor indices? | posterior interosseus |
| What innervates pronator teres? | median N |
| What innervates brachioradialis? | radial n |
| What innervates adductor pollicus? | deep ulnar n |
| What innervates opponens pollicus? | motor recurrent branch of the median N |
| inability to extend the thumb indicates what damage? | damage to the posterior interosseus N causes paralysis of extensor pollicus longus and brevis |
| weakness in lateral rotation and elevation of the arm indicates what damage? | damage to the suprascapular n paralysis of infraspinatus and supraspinatus |
| Fromment's sign indicates | damage to the deep ulnar nerve - paralysis of adductor pollicus |
| What joint does biceps brachii cross? | humeroradial |
| coracobrachialis crosses what joint? | glenohumeral |
| flexor carpi ulnaris crosses what joint? | radiocarpal |
| What joint does extensor digitorum cross? | metacarpophalangeal, radiocarpal, PIP and DIP |
| Ulnar collateral ligament prevents ... | abduction of the humerus |
| glenohumeral ligament prevents ... | anterior dislocation of glenohumeral joint |
| coracoclavicular ligament prevents ... | shoulder separation, dislocation of acromioclavicular joint |
| transverse carpal ligament prevents ... | bowstringing of long digital tendons |
| where do you feel for a radial artery pulse? | lateral to flexor carpi radialis tendon just above the wrist |
| What muscle attaches at the infraglenoid tubercle of the scapula? | long head of triceps brachii |
| What muscle attaches at the radial tuberosity? | biceps brachii |
| What muscle attaches at the olecranon process? | triceps brachii |
| What muscle attaches to the distal phalynx of the middle finger? | flexor digitorum profundus |
| what muscle attaches to the lesser tubercle of the humerus? | subscapularis |
| What muscles attach to the coracoid process of the scapula? | short head of biceps brachii, coracobrachialis, pectoralis minor |
| Weakness of abduction and flexion of the arm indicates damage to... | axillary nerve |
| weakness of adduction of the arm and wasted appearance of the anterior axillary fold indicates damage to ... | medial pectoral nerve |
| inability to pronate the forearm indicates damage to the ... | median nerve |
| contents of the cubital fossa (lateral to medial) | tendon of biceps brachii, brachial artery, median nerve |
| borders of the quadrangular space | surgical neck of humerus (lateral), inferior edge of teres minor (superior), long head of triceps brachii (medial), superior edge of teres major (inferior) |
Created by:
LCiminello
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