41 Questions
Which nerve innervates the muscles in the anterior compartment of the arm?
Musculocutaneous nerve
Which muscle is responsible for adduction of the arm at the shoulder joint?
Coracobrachialis
Which head of the triceps brachii muscle crosses the shoulder joint?
Long head
Which nerve innervates the triceps brachii muscle?
Radial nerve
Which muscle originates from the coracoid process of the scapula?
Coracobrachialis
Which muscle is responsible for supination of the forearm?
Biceps brachii
Which muscle is most active during flexion of arm with forearm in mid-pronation?
Brachioradialis
Which muscle has its origin from the supraglenoid tubercle of the scapula?
Long head of biceps brachii
Which muscle has its insertion at the radial tuberosity and fascia of the forearm?
Biceps brachii
Which nerve innervates the pronator teres, flexor carpi radialis, and palmaris longus muscles?
Median nerve
What is the function of the flexor digitorum superficialis (FDS) muscle?
Flexion of digits 2-5 at MCP and PIP joints
Which nerve innervates the flexor pollicis longus and pronator quadratus muscles?
Median nerve
Which nerve innervates the extensor carpi radialis longus and brevis muscles?
Radial nerve
Which nerve innervates the flexor digitorum profundus?
Ulnar nerve and median
What is the function of the brachioradialis muscle?
Flexes forearm at elbow
If a patient injures the musculocutaneous nerve, will they still be able to perform flexion at the forearm?
Yes, because radial nerve is still intact
Which nerve innervates the extensor indicis muscle?
Radial nerve
What is the innervation of the anconeus muscle?
Radial nerve
Which nerve innervates the Flexor Carpi Ulnaris?
Ulnar nerve
What is the origin of the Flexor Carpi Radialis?
Medial epicondyle of humerus
Which muscle is absent in 12-20% of the population?
Palmaris Longus
What is the insertion of Pronator Teres?
Middle lateral surface of radius
Which nerve is responsible for the flexion of the forearm by the Flexor Carpi Radialis?
Median nerve
What is the function of the Flexor Digitorum Profundus muscle?
Flexion of fingers 2-5
Which nerve innervates the Flexor Digitorum Profundus muscle for the medial half of the muscle?
Ulnar nerve
What is the insertion point of the Flexor Pollicis Longus muscle?
Base of distal phalanx of thumb
Which muscle is responsible for the pronation of the forearm?
Pronator Teres
Which nerve is responsible for the innervation of Pronator Quadratus?
Median nerve
There is only one muscle responsible for pronation of forearm
False
_____ is the only muscle in the forearm compartment that is innervated by 2 nerves
Which of the following muscles has tendons that pass through carpal tunnel?
Flexor digitorum superficialis
Brachioradialis is innervated by....
Radial nerve
Which of the following is the insertion of pronator quadratus?
Anterior surface of distal radius
Which of the following forms the carpal tunnel along with the concavity created by carpal bones?
Flexor retinaculum
Synovial sheaths reduce _____ between the tendons of forearm muscles and underlying bones of the wrist.
The common extensor tendon lies at the ______ epicondyle of humerus
The common flexor tendon lies at the _____ epicondyle of the humerus
Which of these muscles has an origin on the coronoid process of ulna?
D) A and C
Which of these muscles has 3 different origins?
Flexor digitorum superficialis
Which of these muscles can perform adduction of the hand? (ulnar deviation)
Flexor carpi ulnaris
The ulnar nerve travels between the the two heads of ______ (a muscle)
Test your knowledge of the upper limb compartments, arm muscles, and arm compartments with this quiz. Explore the divisions into anterior and posterior compartments and the muscles occupying them, including their functions and innervation.
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