Lecture 16- Forearm and Hand 2 Flashcards
Label this
- Flexor carpi radialis
- Flexor pollicis longus
- Compartment which contains both tendons of flexor digitorum superficialis, and flexor digitorum profundas
What is the name of the fibrous band at the bottom, and what is the yellow thing in the middle that runs beneath the band
Bottom band is the flexor retinaculum, and the yellow structure is the median nerve
For clinical purposes, what are we calling the same as the flexor retinaculum even though its not?
Transverse carpal ligament
What are the attachments for the flexor retinaculum?
- Tubercle of scaphoid
- Tubercle of trapezium
- Pisiform bone
- Hook of hamate
What are the contents of the carpal tunnel?
Long flexor tendons of digits, and the median nerve
What is the common origin for the extensor muscles of the forearm?
Commin origin is around the lateral epicondyle, and also the posterior surface of ulna and interosseous membrane
What is the extensor of the thumb?
Extensor pollicis longus (forms posterior side of snuff box also)
What extends the index finger, and what extends the 5th finger
Index finger = Extensor indicis, 5th finger = Extensor digiti minimi
Where is the common origin for the flexor muscles of the forearm?
Medial epicondyle
Describe the structure of extensor digitorum
It’s muscle belly is in the forearm, and distally it has four tendons which each act as a main extensor for each finger
What tendons are found in the first extensor compartment?
Tendon of abductor pollicis longus and extensor pollicis brevis
Which tendons lie in the second extensor compartment?
Extensor carpi radialis longus, and extensor carpi radialis brevis
Which tendon is found in the 3rd compartment on the extensor side of the wrist?
Tendon of extensor pollicis longus
Which muscle do the set of 4 tendons in the 4th extensor compartment belong to? And there is one more tendon, what does this belong to?
Extensor digitorum, and in the 4th compartment there is also the extensor indicis
Which tendon lies in the 5th extensor compartment?
Extensor digiti minimi