Forearm and wrist Flashcards
What is the common insertion of the muscles of the posterior forearm?
Lateral epicondyle of the humerus
Which nerve innervates the posterior forearm?
Radial nerve
What are the superficial muscles of the posterior compartment of the forearm?
- Extensor digitorum
- Extensor digiti minimi
- Extensor carpi ulnaris
What are the deep muscles of the posterior compartment of the forearm?
- Supinator
- Abductor pollicis longus
- Extensor pollicis longus
- Extensor pollicis brevis
- Extensor indicis
What borders the anatomical snuff box?
Extensor pollicis longus
Extensor pollicis brevis
Which muscles make up the mobile wad?
- Brachioradialis
- Extensor carpi radialis longus
- Extensor carpi radialis brevis
What is the blood supply to the superficial and deep extensors?
Posterior interosseus artery
from the common interosseus artery
What are the superficial muscles of the anterior compartment of the forearm?
- Pronator teres
- Flexor carpi radialis
- Palmaris longus
- Flexor carpi ulnaris
Which nerve passes through the carpal tunnel?
Median nerve
Which nerve enters the hand passing though the Guyon canal (between hook of hamate and pisiform)?
Ulnar nerve
What are the deep muscles of the anterior compartment?
- Flexor digitorum profundus
- Flexor pollicis longus
- Pronator quadratus
Which two nerves innervate the anterior compartment of the forearm?
Median nerve
Ulnar nerve
What is the blood supply to the anterior compartment of the forearm?
Radial artery
Ulnar artery
What is the venous drainage of the anterior compartment of the arm?
Superficial and deep venous palmar arches –> Cephalic vein –> median cubital vein
Which bones are involved in the wrist joint?
Radius
Lunate
Scaphoid
Triquetrum
Is the wrist better at performing adduction or abduction?
Adduction
Which muscles are involved in abduction of the wrist?
Flexor carpi radialis
Extensor carpi radialis longus and brevis
Which muscles are involved in adduction of the wrist?
Extensor carpi ulnaris
Flexor carpi ulnaris
What are the contents of the carpal tunnel?
Flexor digitorum superficialis (4)
Flexor digitorum profundus (4)
Flexor pollicis longus
Median nerve
What is a Colles’ fracture of the wrist?
Distal radial fracture
Which is the most frequently fractured carpal bone and how does this injury occur?
Scaphoid
Fall on outstretched palm
What is an associated complication of a scaphoid fracture?
Damage to the radial artery
What is a common cause of carpal tunnel syndrome?
Inflammation of synovial sheaths
What occurs during carpal tunnel syndrome?
Compression of median nerve
How is carpal tunnel syndrome treated?
Surgical division of flexor retinaculum to relieve compression
