Anatomy of the Hand and Wrist

Question 1

Flexor Digitorum Profundus

Answer 1

O: Proximal/Medial/Anterior three-quarters of the ulna

I: Base of the distal phalanges 2-4

A: Flecion of the DIP, PIP, and MP joint (2-5); Assists with wrist flexion

N:

• 2&3: Median
• 4&5: Ulnar

Question 2

Flexor Digitorum Superficialis

(Humeral, Ulnar, and Radial Heads)

Answer 2

O (Humeral): Common flexor tendon of the medial epicondyle and ulnar collateral ligament

O (Ulnar): Coronoid process

O (Radial): Oblique radial line

I: Middle phalanges of the 2nd thru 5th digits

A: Flexes 2nd thru 5th IP joints; Assits with MP and wrist flexion

N: Median

Question 3

Flexor Carpi Ulnaris

Answer 3

O: Common flexor tendon of the medial epicondyle

I: Pisiform, hamate, and 5th metacarpal

A: Wrist flexion and ulnar deviation; Assits with elbow flexion

N: Ulnar

Question 4

Flexor Carpi Radialis

Answer 4

O: Common flexor tendon of the medial epicondyle

I: Bases of the 2nd and 3rd metacarpals

A: Wrist flexion and radial deviation; Assits with pronation and elbow flexion

N: Median

Question 5

Brachioradialis

Answer 5

O: Lateral supracondylar ridge

I: Lateral radial styloid process

A; Elbow flexion; Assists with pronation and supination

N: Radial

Question 6

Extensor Carpi Radialis Brevis

Answer 6

O: Common extensor tendon of the lateral epicondyle

I: Dorsal base of the 3rd metacarpal

A: Wrist extension; Assits with wrist radial deviation

N: Radial

Question 7

Extensor Carpi Radialis Longus

Answer 7

O: Distal one-third of the lateral suprcondylar ridge

I: Dorsal base of the 2nd metacarpal

A: Wrist extension and radial deviation; Assits with wrist elbow flexion

Question 8

Extensor Digitorum

(Medial and Lateral Band)

Answer 8

O: Common extensor tendon of the lateral epicondyle

I (Medial Band): Base of the proximal phalanges

I (Lateral Band): Base of the distal phalanges

A: Extension of the metacarpals

N: Radial

Question 9

Extensor Indicis

Answer 9

O: Distal/Posterior radius

I: Extensor hood of the index finger

A: Extension of the MP, PIP, and DIP of the index finger; Assits with finger adduction

N: Radial

Question 10

Extensor Carpi Ulnaris

Answer 10

O: Common extensor tendon of the lateral condyle

I: Base of the 5th metacarpal

A: Wrist extension and ulnar deviation

N: Radial