MMB [020] Forearm II Flashcards
There are….(numb) muscles in the posterior compartment of the forarm arranged in…..groups
12 ,,, superficial and deep
The short muscle of the superficial , posterior group is called …
anconeus muscle
3 of the Superficial group posterior forarm muscles : run along the lateral border of the forearm ?
- brachioradialis.
-extensor carpi radialis longus
- extensor carpi radialis brevis.
3 of the Superficial group posterior forarm muscles : run along the posterior border of the forearm ?
-Extensor digitorum
-Extensor digiti minimi
-Extensor carpi ulnaris
Name the muscle and it’s action
Anconeus muscle :
- Assists in extension of the elbow
Name the muscle ;
-and it’s insertion
-action
Brachioradialis :
- Insertion :into the base of the styloid process of radius
- Action : Flex the elbow in mid prone position
Name the muscle ;
-and it’s insertion
-action
Extensor carpi radialis longus
-Insertion : into second metacarpal bone
- Action : Extends and abducts the hand at the wrist joint
Name the muscle ;
-and it’s insertion
-action
Extensor carpi radialis brevis
-Insertion : into base of the third metacarpal bone
- Action : Extends and abducts the hand at the wrist joint
Name the muscle ;
-and it’s insertion
-action
Extensor digitorum
-Insertion : through extensor expansion
- Action : extends the MP and IP joints of the medial four fingers
Name the muscle ;
-and it’s insertion
-action
Extensor digiti minimi
- Insertion : its tendon joins the extensor expansion of the little finger
- Action : Extends all the joints of the little finger
Name the muscle ;
-and it’s insertion
-action
Extensor carpi ulnaris
- Insertion : into fifth metacarpel bone
- Action : Extends and adducts the hand at the wrist joint
Another name for “Tennis elbow” condition ?
lateral epicondylitis
Explain lateral epicondylitis
- a painful condition of the elbow caused by overuse.
- an inflammation of the tendons that join the forearm muscles on the outside of the elbow
Deep group muscles of the posterior forarm ?
They are five muscles one is short and four long muscles
The figure shows the DEEP posterior muscles of the forarm
Mention them
Name the muscle ;
-and it’s insertion
-action
supinator
- Insertion :into lateral surface of radius
- Action : Supinates the extended arm
Name the muscle ;
-and it’s insertion
-action
Abductor pollicis longus
-Insertion :into first metacarpal bone of the thumb.
-Action : abducts and extends the thumb at the carpometacarpal joint.
Name the muscle ;
-and it’s insertion
-action
Extensor pollicis brevis
-Insertion :into base of proximal phalanx of the thumb.
-Action :extends the proximal phalanx of the thumb.
Name the muscle ;
-and it’s insertion
-action
Extensor pollicis longus
-Insertion :into base of distal phalanx of the thumb.
-Action :extends the distal phalanx of the thumb
Name the muscle ;
-and it’s insertion
-action
Extensor indicis
- Insertion :into the extensor expansion of the index .
-Action :extends the joints of the index finger.
How does the Posterior interosseous nerve arise ?
It arises from the radial nerve ,, in the front of the lateral epicondyle of humerus ,, as the deep terminal branch of the radial nerve
Path of Posterior interosseous nerve ?
it passes deep to the extensor retinaculum ,, (in the 4th compartment) to the back of the carpus
