OSPE: Movement of the Forearm and Wrist

Question 1

What are the main muscles involved in Felxion of the Elbow?

What is their nerve supply?

Answer 1

1. Anterior Compartment of the Arm

• Biceps Brachii
• Brachialis
  
  • Both supplied by the Musculocutaneus nerve (C5-7)
• Brachioradialis
  
  • Supplied by the Radial nerve (C5-7)
• (Supported by Pronator teres)
  
  • Supplied by the Median nerve (C5-8+T1)

Question 2

What are the main muslces involved in extension of the Elbow?

How are they innervated?

Answer 2

• Triceps
• Anconeus
  
  • Bot supplied by the Radial Nerve (C5-7)

Question 3

What are the main muscles involved in supination?

What are they supplied by?

Answer 3

1. Biceps Brachii
   
   1. Musculocutaneous nerve (C5-7)
2. Supinator
   
   1. Radial Nerve (C5-7)

Question 4

What are the main muscles involved in pronation?

Which nerve are they supplied by?

Answer 4

1. Pronator Teres
2. Pronator Quadratus
   
   1. Both supplied by the Median nerve (C5-8+T1)

Question 5

What are the main muscles involved in Flexion of the wrist?

Which nerves are involved?

Answer 5

Flexion of wrist: Median and Ulnar nerve

1. Flexor carpi radialis (Median Nerve)
2. Flexor carpi ulnaris (Ulnar Nerve, C6,7)
3. Long flexors of thumb and finger
4. Palmaris longus (Median Nerve)

Question 6

What are the main muscles involved in Extension of the wrist?

Which nerve are they supplied by?

Answer 6

Extension (Radial Nerve )

1. ECRL Extensor Carpi Radialis Longus
2. ECRB Extensor Carpi Radialis Brevis
3. ECU Extensor Carpi Ulnaris
4. Long extensors of the thumb and fingers

Question 7

Which muscles are involved in radial deviation of the wrist?

Which nerve are they supplied by?

Answer 7

Radial Deviation (Abduction) (Radial Nerve C5-8+T1)

1. FCR- Flexor Carpi Radialis
2. ECRL- Extensor Carpi Radialis Longus
3. ECRB- Extensor Carpi Radialis Brevis
4. APL- Abductor Pollicis Longus
5. Extensor pollicis brevis

Question 8

Which Muscles are involved in ulnar deviation of the wrist?

Which nerve are they supplied by?

Answer 8

Adduction, Supplied by the Ulnar Nerve C7,8

1. ECU- Extensor carpi Ulnaris
2. FCU- Flexor Carpi Ulnaris

Question 9

Which muscles abduct the Thumb?

Answer 9

1. Abductor pollicis longus
2. Abductor pollicis brevis

Question 10

Which musces adduct the thumb?

Answer 10

1. Adductor pollicis
2. first dorsal interosseous

Question 11

Which muscles extend the thumb?

Answer 11

1. Extensor pollicis longus
2. Extensor pollicis brevis
3. Abductor pollicis longus

Question 12

Which muscles are involved in flexion of the thumb?

Answer 12

1. Flexor pollicis longus
2. Flexor pollicis brevis

Question 13

Which muscles oppsition the thumb?

Answer 13

Opponens pollicis

Question 14

What are the movements that can occur at the Carpo-metacarpal and intermetarcarpal joints?

Answer 14

1. Flexion/ Extension
2. Radial/Ulnar deviation
3. Circumduction

Question 15

What are the possible movements that can occur at the carpo-phalangeal joints?

Answer 15

1. „Flexion and extension
2. Abduction and adduction“

Question 16

Which movements can occur at the Interphalangeal joints?

What type of joint are they?

Answer 16

They are hinge synovial joints allowing

• Flexion and extension
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