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33 Cards in this Set

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Where do the following nerves branch off of:

- Lateral cutaneous of forearm
- Medial cutaneous of forearm
- Posterior cutaneous of forearm
Musculocutaneous nerve

Medial cord

Radial cord
1. Lateral cutaneous of forearm
2. Medial cutaneous of forearm
3. Posterior cutaneous of forearm
answer
1.Brachioradialis
2. Pronator Teres
3. Flexor Carpi Radialis
4. Palmaris Longus
5. Flexor Carpi Ulnaris
6. Supinator
7. Flexor Digitorum Superficialis
8. Flexor Digitorum Profundus
9. Flexor Pollicis Longus
10. Pronator Quadratus
Name
Which antebrachial flexors are innervated by the Radial nerve?
Brachioradialis

Supinator
Which antebrachial flexors are innvervated by the Ulnar nerve?
Flexor Carpi Ulnaris

Medial half of Flexor Digitorum Profundus
Which antebrachial flexors are innervated by the Anterior Interosseus Nerve?
Lateral half of Flexor Digitorum Profundus

Flexor Pollicis Longus

Pronator Quadratus
The Anterior Interosseus Nerve branches off of what major nerve?
Median nerve
Which antebrachial flexors are innervated by the Median nerve?
1. Pronator Teres
2. Flexor Carpi Radialis
3. Palmaris Longus
4. Flexor Digitorum Superficialis
Which flexor muscles are actually located in the extensor compartment?
Brachioradialis

Supinator
Which flexor muscles commonly come off an epicondyle? Which epicondyle?
Medial epicondyle

Flexor Carpi Radialis
Palmaris Longus
Flexor Carpi Ulnaris
Flexor Digitorum Superficialis

- innervation
- insertion
Median nerve

PIP
Flexor Digitorum Profundus

- innervation
- insertion
Lateral half - Anterior Interosseus nerve

Medial half - Ulnar nerve

DIP
Supination vs. Pronation

- muscles insert where?
- which one is stronger?
All on radius

Supination
1. Extensor Carpi Ulnaris
2. Brachioradialis
3. Extensor Carpi Radialis Longus
4. Extensor Carpi Radialis Brevis
5. Extensor Digitorum
6. Extensor Digiti Minimi

7. Anconeus
8. Supinator
9. Abductor Pollicis Longus
10. Extensor Pollicis Longus
11. Extensor Pollicis Brevis
12. Extensor Indicis

13. Deep branch of Radial n.
14. Superficial branch of Radial n.
15. Posterior Interosseus nerve
16. Superficial branch of Radial n.(cutaneous-hand)
Answer
What is unique about the actions of the Extensor Carpi Radialis Longus?
Extends wrist

Abducts wrist

AND ..... Flex forearm
Which extensor muscles originate from a common epicondyle? Which epicondyle
Lateral epicondyle

Extensor Carpi Radialis Longus
Extensor Carpi Radialis Brevis
Extensor Digitorum
Extensor Digiti Minimi
Extensor Carpi Ulnaris
Describe all insertions for the thumb.
Abductor Pollicis Longus -> CMC

Extensor Pollicis Longus -> IP

Extensor Pollicis Brevis -> MCP
The radial nerve of the forearm:

- branches
- what artery follows each branch
Superficial branch of radial n.
- radial artery

Deep branch of radial n. (PIN)
- Posterior Interosseus artery
What is the only artery in the extensor compartment?
Posterior Interosseus artery
Where does the common interosseus branch off of?
Ulnar artery
Ulnar nerve follows what artery?
Ulnar artery
Median nerve follows what artery?
Nothing. He's a loner.
Extensor Expansion Hood

- Hood attaches where
- Central band attaches where
- Lateral band attaches where
MCP

PIP

DIP
The extensor tendon pulls on which band?
Both central and lateral bands,

thus one cannot be extended without the other.
Define Mallet finger.
Avulsion/separation of distal extensor tendon,

resulting in flexed distal phalanx with cannot be extended.
1. Extensor retinaculum
2. Extensor Pollicis Longus
3. Extensor Pollicis Brevis
4. Dorsal Interosseus muscles
answer
1. Extensor Pollicis Longus
2. Extensor Pollicis Brevis
3. Abductor Pollicis Longus
answer
Why is push stronger than pull in the forearm?
Orientation of collagen fibers of the interosseus membrane.
What are the bones of the wrist?
Scaphoid
Lunate
Triquetrum
Pisiform

Trapezium
Trapezoid
Capitate
Hamate
Radius articulates with which wrist bones?
Scaphoid

Lunate
Metacarpal of thumb articulates with which wrist bones?
Trapezium
Flexor Retinaculum attaches to which wrist bones?
Scaphoid

Trapezium

Pisiform

Hamate
1. Scaphoid
2. Lunate
3. Triquetrum
4. Pisiform

5. Trapezium
6. Trapezoid
7. Capitate
8. Hamate

9. Condyloid joint
10. Plane joint
11. Plane joint
12. Saddle joint
Anterior view