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What is the venous supply of the posterior forearm similar to?
The anterior forearm.
At what point does the radial nerve divide?
At the lateral epicondyle of the humerus.
1/85
p.4
Venous Supply of the Posterior Forearm

What is the venous supply of the posterior forearm similar to?

The anterior forearm.

p.5
Nerve Innervation of the Posterior Forearm

At what point does the radial nerve divide?

At the lateral epicondyle of the humerus.

p.8
Muscles of the Posterior Forearm

What is the function of the dorsal interossei muscles?

They aid in adduction of the digits.

p.10
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What are common signs and symptoms of lateral epicondylitis?

Inflammation at the lateral epicondyle, pain over the lateral epicondyle, and radiating pain down the posterior forearm and hand.

p.4
Venous Supply of the Posterior Forearm

What do deep veins in the posterior forearm do?

They accompany and are named the same as the major arteries.

p.2
Muscles of the Posterior Forearm

What muscles are involved in thumb movements?

Abductor pollicis longus, Extensor pollicis longus, Extensor pollicis brevis.

p.8
Muscles of the Posterior Forearm

How many synovial sheaths do the extensor tendons pass under?

Six.

p.10
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What causes lateral epicondylitis?

Repetitive use of superficial forearm extensors that attach at the lateral epicondyle.

p.7
Osteology of the Hand

What are the three parts of each metacarpal?

Head, Shaft, Base.

p.10
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What is the etiology of synovial cysts?

Idiopathic; the etiology is unknown.

p.9
Anatomy of the Hand

Which tendons join the lateral bands of the extensor expansion?

Interossei and lumbrical tendons.

p.1
Osteology of the Humerus

What is the attachment point for extensor muscles on the humerus?

Lateral epicondyle.

p.11
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What is another name for Mallet Finger?

A 'jammed' finger.

p.2
Muscles of the Posterior Forearm

Which muscles extend the four medial fingers?

Extensor digitorum, Extensor indices, Extensor digiti minimi.

p.7
Osteology of the Hand

How many metacarpals are there in the hand?

Five in total.

p.7
Osteology of the Hand

How many medial phalanges are there in the hand?

Four medial phalanges.

p.9
Anatomy of the Hand

What do the lateral bands of the extensor expansion attach to?

They attach to the base of the distal phalanx.

p.9
Venous Supply of the Posterior Forearm

What is the dorsal venous arch?

A network of superficial veins on the dorsal surface of the hand.

p.1
Osteology of the Humerus

Which part of the humerus articulates with the olecranon process of the ulna?

Trochlea.

p.2
Muscles of the Posterior Forearm

What are the main muscles in the deep layer of the posterior forearm?

Supinator, Abductor pollicis longus, Extensor pollicis brevis, Extensor pollicis longus, Extensor indicis.

p.8
Muscles of the Posterior Forearm

What is unique about the dorsal interossei muscles?

They are the only intrinsic muscles on the dorsum of the hand.

p.7
Osteology of the Hand

Which metacarpal corresponds to the pinky?

The fifth metacarpal.

p.8
Muscles of the Posterior Forearm

What is the function of the extensor digitorum?

It extends the digits.

p.9
Anatomy of the Hand

What is the function of the median band of the extensor expansion?

It attaches from the proximal phalanx to the base of the middle phalanx.

p.1
Osteology of the Humerus

What is the attachment point for flexor muscles on the humerus?

Medial epicondyle.

p.1
Muscles of the Posterior Forearm

Which muscle in the superficial layer is responsible for extending the digits?

Extensor digitorum.

p.6
Anatomical Snuffbox

What is the anatomical snuffbox?

A hollow gap in the posterior/lateral wrist that appears when the thumb is extended.

p.3
Arterial Supply of the Posterior Forearm

What is the arterial supply of the posterior forearm similar to?

The anterior forearm.

p.8
Muscles of the Posterior Forearm

How many dorsal interossei muscles are there in the hand?

Four.

p.7
Osteology of the Hand

Which metacarpal corresponds to the thumb?

The first metacarpal.

p.8
Muscles of the Posterior Forearm

Which extensor tendons are associated with the radial side of the wrist?

Extensor carpi radialis longus and brevis.

p.7
Osteology of the Hand

What is unique about the thumb's phalanges?

The thumb only has a proximal and distal phalange.

p.1
Anatomy of the Ulna

Which notch of the ulna articulates with the trochlea of the humerus?

Trochlear notch.

p.4
Venous Supply of the Posterior Forearm

Name a superficial vein in the posterior forearm.

Cephalic vein.

p.11
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What is the mechanism of injury for Mallet Finger?

The distal interphalangeal joint is forced into hyperflexion.

p.2
Muscles of the Posterior Forearm

Which muscles are responsible for wrist movements?

Extensor carpi radialis longus, Extensor carpi radialis brevis, Extensor carpi ulnaris.

p.10
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What is another name for lateral epicondylitis?

Tennis elbow.

p.8
Muscles of the Posterior Forearm

What are the first two extensor tendons that pass under the extensor retinaculum?

Abductor pollicis longus and extensor pollicis brevis.

p.5
Nerve Innervation of the Posterior Forearm

Where does the superficial radial nerve exit?

Superficial between the brachioradialis and extensor carpi radialis longus tendons.

p.1
Osteology of the Humerus

Which part of the humerus articulates with the head of the radius?

Capitulum.

p.6
Anatomical Snuffbox

What structures form the floor of the anatomical snuffbox?

Scaphoid and trapezium bones.

p.3
Anatomical Snuffbox

What anatomical feature does the radial artery cross through at the wrist?

The anatomical snuff box.

p.11
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What is a key sign of Mallet Finger?

The injured joint is forced into a flexed position due to the torn extensor tendon.

p.7
Osteology of the Hand

What are the eight carpal bones of the hand?

Scaphoid, Lunate, Triquetrum, Pisiform, Hamate, Capitate, Trapezium, Trapezoid.

p.10
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What are potential injuries associated with lateral epicondylitis?

Tearing of muscles or avulsion of the lateral epicondyle of the humerus.

p.7
Osteology of the Hand

How many proximal phalanges are there in the hand?

Five proximal phalanges.

p.10
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What are the signs and symptoms of synovial cysts?

Small swelling on the posterior wrist, typically non-tender or painful, but can enlarge and cause pain when flexing the wrist.

p.1
Muscles of the Posterior Forearm

Name a muscle in the superficial layer of the posterior forearm that extends the wrist.

Extensor carpi radialis longus.

p.11
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What causes Mallet Finger?

Trauma that causes avulsion of the extensor tendon from the distal phalanx.

p.2
Muscles of the Posterior Forearm

What are the three functional units of the posterior forearm muscles?

Movements at the wrist, movements of the fingers, movements of the thumb.

p.5
Nerve Innervation of the Posterior Forearm

Where does the radial nerve travel along the arm?

Along the posterior/lateral side of the humerus.

p.5
Nerve Innervation of the Posterior Forearm

What is the function of the posterior interosseous nerve?

Motor innervation to posterior compartment muscles.

p.10
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

Where do synovial cysts typically form?

On the synovial tendon sheaths of the extensor tendons.

p.7
Osteology of the Hand

How many distal phalanges are there in the hand?

Five distal phalanges.

p.9
Venous Supply of the Posterior Forearm

Where do the lateral dorsal surface veins drain?

Into the cephalic vein.

p.6
Anatomical Snuffbox

What are the lateral borders of the anatomical snuffbox?

Extensor pollicis brevis and abductor pollicis longus muscles.

p.3
Arterial Supply of the Posterior Forearm

What is the radial artery a terminal branch of?

The brachial artery.

p.4
Venous Supply of the Posterior Forearm

What is another superficial vein found in the posterior forearm?

Basilic vein.

p.11
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What is a common cause of Mallet Finger?

Sports injuries.

p.5
Nerve Innervation of the Posterior Forearm

Which nerve innervates all muscles of the posterior forearm?

Radial nerve (C8 - T1).

p.5
Nerve Innervation of the Posterior Forearm

What does the deep radial nerve turn into after passing through the supinator muscle?

Posterior interosseous nerve.

p.10
Clinical Considerations: Lateral Epicondylitis and Mallet Finger

What are synovial cysts also known as?

Ganglion cysts.

p.9
Anatomy of the Hand

Which muscle's tendon does the extensor expansion attach to?

The tendon of the extensor digitorum muscle.

p.9
Muscles of the Posterior Forearm

What is the primary function of the extensor expansions?

They hold the extensor digitorum tendons in place and allow for full extension of the fingers.

p.1
Anatomy of the Radius

What articulates with the capitulum of the humerus?

Head of the radius.

p.3
Arterial Supply of the Posterior Forearm

Where does the ulnar artery initially accompany in the forearm?

The median nerve between the heads of the flexor digitorum superficialis muscle.

p.5
Nerve Innervation of the Posterior Forearm

Where does the superficial radial nerve travel?

Beneath the brachioradialis muscle.

p.8
Muscles of the Posterior Forearm

Which extensor tendon is responsible for extending the little finger?

Extensor digiti minimi.

p.7
Osteology of the Hand

What are the three parts of each phalanx?

Head, Shaft, Base.

p.1
Anatomy of the Radius

What is the function of the interosseous border of the radius?

Attachment for interosseous membrane.

p.3
Arterial Supply of the Posterior Forearm

What artery does the radial artery give off in the forearm?

Radial recurrent artery.

p.5
Nerve Innervation of the Posterior Forearm

What is the sensory function of the superficial radial nerve?

Sensory nerve only to the lateral dorsum of the hand.

p.8
Muscles of the Posterior Forearm

What is the last extensor tendon listed that passes under the extensor retinaculum?

Extensor carpi ulnaris.

p.9
Arterial Supply of the Posterior Forearm

What is the arterial supply to the dorsum of the hand derived from?

Palmar arterial arches.

p.9
Venous Supply of the Posterior Forearm

Where do the medial dorsal surface veins drain?

Into the basilic vein.

p.1
Muscles of the Posterior Forearm

What is a common attachment point for many muscles in the superficial layer of the posterior forearm?

Lateral epicondyle of the humerus.

p.3
Arterial Supply of the Posterior Forearm

What are the branches of the common interosseous artery?

Anterior interosseous artery, posterior interosseous artery, and interosseous recurrent artery.

p.9
Anatomy of the Hand

What is the extensor expansion?

A triangular, tendinous aponeurosis that wraps over the metacarpals and phalanges.

p.9
Nerve Innervation of the Posterior Forearm

What are the three main cutaneous innervations of the dorsum of the hand?

Radial (lateral), Ulnar (medial), and Median (fingertips).

p.6
Anatomical Snuffbox

What forms the medial border of the anatomical snuffbox?

Extensor pollicis longus muscle.

p.3
Arterial Supply of the Posterior Forearm

Where does the radial artery travel in relation to the brachioradialis muscle?

Just deep to the brachioradialis muscle.

p.1
Anatomy of the Ulna

What is the function of the olecranon process of the ulna?

Slides into the olecranon fossa of the humerus.

p.3
Arterial Supply of the Posterior Forearm

What are the branches given off by the ulnar artery in the forearm?

Anterior ulnar recurrent artery, posterior ulnar recurrent artery, and common interosseous artery.

p.6
Anatomical Snuffbox

Why is the anatomical snuffbox an important landmark?

It is where the radial artery travels through to reach the hand, allowing for radial pulse measurement.

p.3
Arterial Supply of the Posterior Forearm

What is the ulnar artery a terminal branch of?

The brachial artery.

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