Upper Limb: Forearm Region Flashcards
True or false: The radius is the laterally located long bone of the forearm.
True
Which of the following are considered important bony landmarks of the radius? Select all that apply.
Head
Trochlear notch
Styloid process
Carpal articular surfaces
Radial notch
Ulnar notch
Head
Styloid process
Carpal articular surfaces
Ulnar notch
Which of the following are considered important bony landmarks of the ulna? Select all that a apply.
Ulnar notch
Radial notch
Coronoid process
Greater tubercle
Tuberosity
Styloid
Radial notch
Coronoid process
Tuberosity
Styloid
Which of the following bones are found in the proximal row of carpal bones? Select all that apply.
Scaphoid
Trapezium
Lunate
Pisiform
Capitate
Scaphoid
Lunate
Pisiform
Which structures articulate to form the proximal radioulnar joint?
Head of the radius and radial notch of the ulna
True or false: The radioulnar joints are pivot joints that allow 1 degree of freedom: pronation and supination.
True
True or false: During the movement of pronation the radius will cross over the ulna.
True
True or false: The radiocarpal joint is a condyloid joint that allows one degree of freedom: flexion and extension.
False
Which tendons are easily palpated as they cross the anterior aspect of the wrist? Select all that apply.
Flexor capri radialis
Flexor digitorum profundus
Palmaris longus
Pronator teres
Flexor carpi ulnaris
Flexor digitorum superficialis
Flexor capri radialis
Palmaris longus
Flexor carpi ulnaris
Flexor digitorum superficialis
True or false: The thickening of the antebrachial fascia across the anterior aspect of the wrist forms the flexor retinaculum.
True
Which muscles are contained in the superficial layer of the anterior compartment of the forearm? Select all that apply.
Flexor digitorum profundus
Pronator qadratus
Pronator teres
Palmaris longus
Flexor digitorum superficialis
Pronator teres
Palmaris longus
Which of the following muscles originate from the medial epicondyle of the humerus? Select all that apply.
Flexor carpi radialis
Flexor capri ulnaris
Flexor digitorum profundus
Flexor pollicis longus
Palmaris longus
Flexor carpi radialis
Flexor capri ulnaris
Palmaris longus
Which of the following muscles will insert onto a metacarpal bone? Select all that apply.
Flexor capri radialis
Flexor digitorum superficialis
Pronator quadratus
Flexor carpi ulnaris
Pronator teres
Flexor capri radialis
Flexor carpi ulnaris
Which of the following muscles will flex the digits of the hand? Select all that apply.
Pronator teres
Flexor carpi ulnaris
Flexor digitorum superficialis
Flexor capri radialis
Flexor digitorum superficialis
Which of the following muscles is innervated by the ulnar nerve?
A. Flexor carpi ulnaris
B. Flexor carpi radialis
C. Palmaris longus
D. Flexor pollicis longus
A
Which of the following structures forms the lateral border of the cubital fossa?
A. Imaginary line between epicondyles
B. Brachioradialis
C. Pronator teres
B
What structures travel through the cubital fossa? Select all that apply.
Terminal end of brachial artery
Ulnar nerve
Median nerve
Proximal parts of ulnar and radial arteries
Biceps tendon
Terminal end of brachial artery
Median nerve
Proximal parts of ulnar and radial arteries
Biceps tendon
Which of the following structures forms the medial boundary of the cubital fossa?
A. Cubital retinaculum
B. Medial epicondyle
C. Olecranon
B
True or false: The median nerve travels through the cubital tunnel.
False
The ulnar nerve does!
The median nerve travels between which two muscles in the anterior compartment of the forearm?
A. Pronator teres and flexor pollicis longus
B. Flexor digitorum superficialis and profundus
C. Flexor digitorum profundus and flexor pollicis longus
B
True or false: The median nerve gives off a deep branch called the anterior interosseous nerve.
True
True or false: The ulnar nerve will provide motor innervation to the major of muscles in the anterior compartment of the forearm.
False
It is the median nerve!
Which of the following nerves supply the skin of the anterior aspect of the forearm? Select all that apply.
Medial antebrachial cutaneous
Ulnar
Median
Lateral antebrachial cutaneous
Medial antebrachial cutaneous
Lateral antebrachial cutaneous
True or false: The common interosseous artery is a branch of the radial artery.
False
Branch of ulnar artery
True or false: The cubital anastomosis is formed by the branches of brachial, ulnar, and radial arteries.
True
Which of the following arteries contributes to the formation of the cubital anastomosis? Select all that apply.
Ulnar collaterals (superior and inferior)
Radial and medial collaterals
Recurrent interosseous
Anterior interosseous
Radial recurrent
Ulnar collaterals (superior and inferior)
Radial and medial collaterals
Recurrent interosseous
Radial recurrent
All of the following are true of the proximal radioulnar joint EXCEPT:
A. Its key ligament is the annular ligament which wraps completely around the head of the radius.
B. It is a synovial pivot joint
C. The joint allows for supination and pronation of the forearm
D. The joint articular the head of the ulna and the ulnar notch of the radius
D
D describes the distal radioulnar joint of the forearm.
True or false: In the anterior portion of the forearm, the superficial and deep layers are mostly innervated by the axillary nerve.
False
Median nerve innervates the superficial and deep layers of the forearm.
Axillary nerve innervates the deltoid and teres minor.
What muscles are part of the deep layer of the anterior compartment of the forearm. Select all that apply.
Pronator quadratus
Palmaris longus
Flexor pollicis longus
Flexor digitorum profundus
Pronator teres
Pronator quadratus
Flexor digitorum profundus
Flexor pollicis longus
What movement of the wrist is associated with ulnar deviation?
Adduction
What movement of the wrist is associated with radial deviation?
Abduction
True or false: All bones in the proximal row of the carpals contribute to the radioulnar joint.
FALSE
Only the Scaphoid, lunate, and triquitral bones; the pisiform is a sesamoid bone that does not articulate with the radius.
True or false: The radial head is proximal.
True!
And it articulates with the radial notch of the ulna
True or false: The ulnar head is proximal.
FASLE!
It is distal, closer to the wrist, and it articulates with the ulnar notch of the radius
If you have an injury to the anterior interosseous nerve, what would happen when the client goes to make an “OK” sign with their hand?
The DIP of thumb and PIP of digits would not be able to flex (would not be able to touch finger tips together)
DIP: distal interphalangeal joint
PIP: proximal interphalangeal joint
What are the 8 carpal bones from proximal to distal (lateral to medial)?
Proximal: Scaphoid, lunate, triquetrum, pisiform
Distal: Trapezium, trapezoid, capitate, hamate
Remember: “Some Lovers Try Positions That They Can’t Handle”
What is the name of the structure that separates the anterior and posterior structures of the forearm?
Interosseous membrane
What bones articulate with the radius to form the radiocarpal joint?
Scaphoid, lunate, triquetrum
True or false: The distal radioulnar joint is formed by the articulations of the head of the radius with the radial notch of the ulna.
FALSE
Proximal radioulnar joint: Head of radius and radial notch of ulna
Distal radioulnar joint: Head of ulna and ulna notch of radius
True or false: The radius rotates over the fixed ulna.
True
True or false: The radiocarpal joint is a saddle type of synovial joint.
FALSE
Condyloid type
Which joint is formed by the articulations between the proximal and distal row of carpal bones?
Midcarpal joint (MC joint)
Which joint is formed by the articulations of adjacent carpal bones?
Intercarpal joint (IC joint)
What is a colles fracture?
Fracture of the distal end of the radius
What is a “pulled elbow”? How is this different from a dislocation?
Pulled elbow is also known as elbow subluxation; caused by sudden jerking of the upper limb while arm is pronated; causes a tear in the annular ligament and the radius will move distally out of ligament
If the radius moves laterally, that is a dislocation.
What are the important bony landmarks of the radius and ulna?
Radius: ulnar notch, radial tuberosity, styloid process, articular surfaces
Ulna: radial notch, styloid process, ulnar tuberosity, trochlear notch, coronoid process, olecranon
What ligament forms a ring that encircled the head of the radius?
Annular ligament
The median nerve innervates all the flexor pronator of the anterior forearm except which two muscles?
Flexor carpi ulnaris
Flexor digitorum profundus (1/2 innervated by median and 1/2 ulnar)
Which muscles make up the superficial layer of the flexor pronators of the anterior forearm?
Pronator teres
flexor carpi radialis
Palmaris longus
flexor carpi ulnaris
Which muscles make up the intermediate layer of the flexor pronators of the anterior forearm?
Flexor digitorum suerficialis
Which muscles make up the deep layer of the flexor pronators of the anterior forearm?
Flexor digitrum profundus
Flexor pollicis longus
Pronator quadratus
What muscle is this? Name its origin, insertion, innervation, and action.
NAME: Pronator teres
ORIGIN: Humeral head-medial epicondyle of humerus; ulnar head-coronoid process of ulna
INSERTION: midway along lateral surface of radius
INNERVATION: median nerve
ACTION: pronates forearm and flexes elbow
What muscle is this? Name its origin, insertion, innervation, and action.
NAME: Flexor carpi radialis
ORIGIN: medial epicondyle of humerus
INSERTION: base of 2nd and 3rd metacarpals
INNERVATION: median nerve
ACTION: flexes and abducts (radially deviates) wrist joint
What muscle is this? Name its origin, insertion, innervation, and action.
NAME: Palmaris longus
ORIGIN: medial epicondyle of humerus
INSERTION: palmar aponeurosis
INNERVATION: median nerve
ACTION: flexes wrist and tightens palmar aponeurosis
What muscle is this? Name its origin, insertion, innervation, and action.
NAME: Flexor carpi ulnaris
ORIGIN: humeral head-medial epicondyle of humerus; ulnar head-posterior border of ulna and olecranon
INSERTION: pisiform, hook of hamate, 5th metacarpal
INNERVATION: ulnar nerve
ACTION: flexes and adducts (ulnar deviation) wrist
What muscle is this? Name its origin, insertion, innervation, and action.
NAME: Flexor pollicis longus
ORIGIN: anterior surface of radius and interosseous membrane
INSERTION: base of distal phalanx of thumb
INNERVATION: anterior interosseous nerve (median nerve)
ACTION: flexes interphalangeal (IP) joint primarily, and MP joints of thumb; can assist with wrist flexion
What muscle is this? Name its origin, insertion, innervation, and action.
NAME: Flexor digitorum superficialis
ORIGIN: humeral head-medial epicondyle of humerus, coronoid process of ulna; radial head-superior half of anterior radius
INSERTION: bodies of middle phalanges of medial 4 digits
INNERVATION: median nerve
ACTION: flexes proximal interphalangeal (PIP) and metacarpophalangeal (MCP) joints of digits; assists with wrist flexion
What muscle is this? Name its origin, insertion, innervation, and action.
NAME: Pronator quadratus
ORIGIN: Distal 1/4 of anterior surface of ulna
INSERTION: distal 1/4 anterior surface of radius
INNERVATION: anterior interosseous nerve (Median nerve)
ACTION: pronates forearm; deep fibers bind radius and ulna together
What muscle is this? Name its origin, insertion, innervation, and action.
NAME: Flexor digitorum profundus
ORIGIN: medial and anterior surfaces of proximal 3/4 of ulna and interosseous membrane
INSERTION: bases of distal phalanges of medial 4 digits
INNERVATION: medial part-ulnar nerve; lateral part-anterior interosseous nerve (branch of median nerve)
ACTION: flexes distal interphalangeal (DIP) joint of digits; assists with wrist flexion
What are the important muscular landmarks of the proximal forearm?
Flexor carpi radialis, Palmaris longus, flexor carpi ulnaris, pronator teres
What tendons can be seen crossing the anterior aspect of the wrist?
Flexor capri radialis, Palmaris longus, flexor carpi ulnaris, flexor digitorum superficialis
Which muscles of the anterior compartment of the forearm produce their actions on the radioulnar joints?
Flexor carpi ulnaris, flexor carpi radialis, prontaor teres, pronator quadratus
What is the only muscle in the anterior compartment of the forearm to act on the thumb?
Flexor pollicis longus
What are the boundaries of the cubital fossa?
Imaginary lie between epicondyles
Brachioradialis
Pronator teres
Brachialis
Supinator
Fascia and skin
What neurovascular structures transition through the cubital fossa?
Ulnar artery
Radial artery
Accompanying veins
Median nerve
Radial nerve (divisions into superficial sensory and deep branches)
Biceps tendon
What is the difference between the cubital fossa and the cubital tunnel in regard to location?
Cubital fossa: anterior
Cubital tunnel: medial aspect of elbow
What transmits through the cubital tunnel?
Ulnar nerve
What are the boundaries of the cubital tunnel?
Cubital retinaculum
Ulnar collateral ligament (medial collateral ligament)
Elbow joint capsule
Medial epicondyle
Olecranon