Week 9 Flashcards by Brooke McIntosh

What two joints does the wrist consist of?

Radiocarpal joint

Midcarpal joint

How well did you know this?

Not at all

Perfectly

What joint motions can the wrist perform?

Flexion (90 degrees)

Neutral

Extension (70 degrees)

Radial deviation (25 degrees)

Ulnar deviation (30 degrees)

How well did you know this?

Not at all

Perfectly

What are the carpal bones?

Scaphoid

Lunate

Triquetrum

Pisiform

Hamate

Capitate

Trapezium

Trapezoid

How well did you know this?

Not at all

Perfectly

What are the muscles in the superficial layer of the anterior forearm

1) Flexor carpi radialis

2) Palmaris longus

3) Flexor carpi ulnaris

4) Pronator teres

How well did you know this?

Not at all

Perfectly

What are the muscles in the posterior forearm?

1) Extensor carpi radialis longus

2) Extensor carpi radialis brevis

3) Extensor carpi ulnaris

How well did you know this?

Not at all

Perfectly

What is the origin of the Flexor carpi ulnaris?

Medial epicondyle

How well did you know this?

Not at all

Perfectly

What is the insertion of the Flexor carpi ulnaris?

Base of 5th metacarpal
Pisiform

How well did you know this?

Not at all

Perfectly

What action does the Flexor carpi ulnaris perform?

Wrist flexion

Ulnar deviation

How well did you know this?

Not at all

Perfectly

What is the origin of the Flexor carpi radialis?

Medial epicondyle

How well did you know this?

Not at all

Perfectly

What is the insertion of the Flexor carpi radialis?

Base of 2nd and 3rd metacarpals

How well did you know this?

Not at all

Perfectly

What action does the Flexor carpi radialis perform?

Wrist flexion

Radial deviation

How well did you know this?

Not at all

Perfectly

What is the origin of the Palmaris Longus?

Medial epicondyle

How well did you know this?

Not at all

Perfectly

What is the insertion of the Palmaris Longus?

Palmar fascia

How well did you know this?

Not at all

Perfectly

What action does the Palmaris Longus perform?

Assists in wrist flexion

How well did you know this?

Not at all

Perfectly

What is the origin of the Extensor Carpi Radialis Longus?

Just above lateral epicondyle (supracondylar ridge)

How well did you know this?

Not at all

Perfectly

What is the insertion of the extensor Carpi Radialis Longus?

Base of 2nd metacarpal

How well did you know this?

Not at all

Perfectly

What action does the Extensor Carpi Radialis Longus perform?

Wrist extension

Radial deviation

Assists elbow extension

How well did you know this?

Not at all

Perfectly

What is the origin of the Extensor carpi radialis brevis?

Lateral epicondyle

How well did you know this?

Not at all

Perfectly

What is the insertion of the Extensor carpi radialis brevis?

Base of 3rd metacarpal

How well did you know this?

Not at all

Perfectly

What action does the Extensor carpi radialis brevis perform?

Prime mover of wrist extension

Assists in elbow extension

How well did you know this?

Not at all

Perfectly

What is the origin of the Extensor carpi ulnaris?

Lateral epicondyle

How well did you know this?

Not at all

Perfectly

What is the insertion of the Extensor carpi ulnaris?

Base of 5th metacarpal

How well did you know this?

Not at all

Perfectly

What action does the Extensor carpi ulnaris perform?

Prime mover of wrist extension

Prime mover of ulnar deviation

Assists in elbow extension

How well did you know this?

Not at all

Perfectly

What are the extensors of the wrist

–> remembering that the extensors are more posterior (in anatomical position)

Extensor carpi radialis longus (ECRL)

Extensor carpi radialis brevis (ECRB)

Extensor carpi ulnaris (ECU)

How well did you know this?

Not at all

Perfectly

What is the function of the extensors?

Keep tendons in alignment and prevent bowstringing

What does 1) phalanges 2) metacarpals 3) carpals mean?

Phalanges: fingers Metacarpals: palm of the hand Carpals: wrist bones

What does 1) DIP's 2) PIP's 3) IP's 4) MCP's 5) CMC's mean?

DIP's = distal interphalangeal joints PIP's = proximal interphalangeal joints IP's = interphalangeal joints MCP's = metacarpophalangeal joints CMC's carpometacarpal joints

What joint's make up the elbow?

1) Elbow joint --> articulation between the humerus and ulna --> Uniaxial - allows flexion and extension 2) Radioulnar joint --> articulation between radius and ulna --> Uniaxial - allows pronation and supination --> there are 2, a proximal and a distal radioulnar joint

True or false: the elbow joint and radioulnar joint are biaxial

False --> they are both uniaxial

True or false: the ulna moves around the radius

False --> the ulna does not move --> distal end of radius rotates around the distal end of ulna

True or false: Ulna is on the medial side of the forearm and the radius is on the lateral side

True

True or false: the ulna articulates with the trochlea

True

What are the 6 landmarks of the humerus?

1) Trochlea 2) Capitulum 3) Medial epicondyle 4) Lateral epicondyle 5) Lateral supracondylar ridge 6) Olecranon fossa

What are the 7 key landmarks of the ulna?

1) Olecranon process 2) Trochlear notch 3) Coronoid process 4) Radial notch 5) Ulnar tuberosity 6) Styloid process 7) Head

What are the 8 key muscles of the elbow and forearm?

1) Brachialis 2) Biceps brachii 3) Brachioradialis 4) Triceps brachii 5) Anconeus 6) Pronator teres 7) Pronator quadratus 8) Supinator

General information about the brachialis

--> found deep to the biceps brachii --> plays no role in supination/pronation

True or false: the brachialis is found superficial to the biceps brachii

False --> found deep to biceps brachii

True or false: the brachialis does not supinate or pronate the arm

True

Origin of the brachialis

Humerus --> half way down shaft

Insertion of the brachialis

Ulna --> coronoid process --> ulnar tuberosity

What action does the brachialis perform?

Elbow flexion

True or false: the biceps brachii has one head and one shaft

False --> biceps brachii has two heads = both attach to the scapula

Origin of the biceps brachii

Scapula --> supraglenoid tubercle --> coracoid process

Insertion of the biceps brachii

Radius --> radial tuberosity

What action does the biceps brachii perform?

1) Elbow flexion 2) Supination

Origin of the brachioradialis

Distal humerus --> lateral supracondylar ridge

Insertion of the brachioradialis

Distal radius --> styloid process

What action does the brachioraialis perform?

1) Elbow flexion 2) Helps to pronate and supinate back to neutral position

True or false: the triceps brachii has 2 heads

False --> has three heads = long, lateral, and medial head

Origin of the triceps brachii

1) Scapula --> long head/infraglenoid tubercle 2) Humerus --> medial and lateral heads

Insertion of the triceps brachii

Ulna --> olecranon process

What action does the triceps brachii perform?

Elbow extension

What is the anconeus?

a muscle that is small and helps the triceps extend the elbow

What is the pronator teres?

Superficial muscle that crosses the elbow, but is covered by the brachioradialis at distal end

Origin of the pronator teres muscle

Medial epicondyle

Insertion of the pronator teres

Mid radius

What action does the pronator teres perform?

Pronates forearm Assists in elbow flexion

Origin of the pronator quadratus muscle

Distal ulna

Insertion of the pronator quadratus muscle

Distal radius

What action does the pronator quadratus muscle perform?

Pronates forearm

What ligaments are associated with the elbow joint?

1) Medial collateral ligament 2) Lateral collateral ligament

What ligaments and other structures are associated with the radioulnar joint?

1) Annular ligament 2) Interosseus membrane