40 Questions
Which nerve enters the cubital fossa and then divides into its terminal branches?
Radial nerve
Which muscle forms the lateral boundary of the cubital fossa?
Brachioradialis
Which branch of the radial nerve provides sensory innervation to the dorsum of the hand and fingers?
Superficial branch
What muscles of the posterior compartment of the arm and forearm are innervated by the radial nerve?
Triceps brachii, anconeus, and extensor muscles of the forearm
Which branch of the radial nerve continues into the forearm and supplies motor innervation to the muscles of the posterior compartment of the forearm?
Deep branch (posterior interosseous nerve)
What is the primary function of the brachial artery in the cubital fossa?
To supply oxygenated blood to the forearm and hand
What is the primary role of the median nerve in the cubital fossa?
To provide motor and sensory innervation to the muscles and skin of the forearm and hand
What is the primary function of the bicipital aponeurosis in the cubital fossa?
To connect the basilic and cephalic veins for venipuncture
What is the primary purpose of the median cubital vein in the cubital fossa?
To connect the basilic and cephalic veins for venipuncture
What is the primary function of the deep branch of the radial nerve in the cubital fossa?
To provide motor and sensory innervation to the muscles and skin of the forearm and hand
Where does the cephalic vein typically originate from?
Dorsal venous arch of the hand
Which space does the cephalic vein often traverse before entering the axillary region?
Deltoid groove
What is the termination point of the cephalic vein?
Axillary vein
Along which aspect of the forearm does the basilic vein ascend?
Medial aspect
What does the basilic vein merge with to form the axillary vein in the axillary region?
Brachial vein
Which of the following statements about the musculocutaneous nerve is incorrect?
It carries fibers primarily from C3, C4, and C5 nerve roots.
Which of the following muscles is not innervated by the musculocutaneous nerve?
Deltoid
What is the terminal branch of the musculocutaneous nerve that provides sensory innervation to the lateral aspect of the forearm?
Lateral cutaneous nerve of the forearm
Which of the following statements about the course of the musculocutaneous nerve is correct?
It runs alongside the brachial artery in the arm.
Which of the following nerve roots contribute to the formation of the musculocutaneous nerve?
C5, C6, C7
Which ligament connects the lateral epicondyle of the humerus to the annular ligament and lateral ulnar collateral ligament, providing stability against varus (medial) forces?
Lateral (Radial) Collateral Ligament
Which of the following muscles is not responsible for flexion of the elbow joint?
Triceps Brachii
Which joint is formed by the articulation between the $\text{radial notch of the ulna}$ and the $\text{head of the radius}$?
Proximal radioulnar joint
Which of the following ligaments provides stability against $\text{valgus (lateral) forces}$ on the elbow joint?
Medial (Ulnar) Collateral Ligament
Which of the following movements at the elbow joint increases the angle between the forearm and upper arm?
Extension
Which of the following statements accurately describes the origin of the median cubital vein?
It arises from the union of the cephalic and basilic veins in the cubital fossa.
Which nerve primarily innervates the flexor muscles on the medial side of the forearm?
Ulnar nerve
Which muscle is responsible for flexing the distal phalanges of the fingers at the distal interphalangeal (DIP) joints?
Flexor digitorum profundus
What is the primary function of the palmaris longus muscle?
Flexes the wrist and tenses the palmar aponeurosis
Which of the following muscles is responsible for flexing and abducting the wrist?
Flexor carpi radialis
Which muscle is responsible for flexing the thumb at the interphalangeal joint?
Flexor Pollicis Longus
Which muscle is primarily responsible for supinating the forearm?
Supinator
Which muscle extends and abducts the wrist?
Both A and B
Which muscle abducts and extends the thumb?
Both A and B
Which muscle extends the index finger?
Extensor Indicis
Which muscle flexes the elbow when the forearm is in the midposition between pronation and supination?
Brachioradialis
Which muscle adducts and extends the wrist?
Extensor Carpi Ulnaris
Which muscle flexes and adducts the wrist?
Flexor Carpi Ulnaris
Which of the following is not a muscle in the extensor compartment of the forearm?
Flexor Carpi Ulnaris
Which nerve primarily innervates the muscles in the extensor compartment of the forearm?
Radial nerve
Learn about the origin, root value, course, termination, and distribution of the musculocutaneous nerve and radial nerve. Explore how these nerves arise from the brachial plexus and their pathway through the upper limb muscles.
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