4.1.1. Extensor and Abductor/Addutor Muscles of the Hand at the Wrist Joint Flashcards
What are the Muscles of the Posterior Forearm commonly known as?
Extensor Muscles
What is the General Function of these Muscles?
To Produce Extension at the Wrists and Fingers
Which Nerve innervates the Muscles of the Posterior Forearm?
The Radial Nerve
- How many groups can the Muscles of the Posterior Forearm be Divided into, Anatomically?
- What are they?
- 2
- a) Superficial Muscles of the Posterior Forearm
- b) Deep Muscles of the Posterior Forearm
- How many groups can the Muscles of the Posterior Forearm be Divided into, Functionally?
- What are they?
- 3
- a) Muscles which Extend and Abduct / Adduct the Hand at the Wrist Joint
- b) Muscles which Extend the Medial 4 Digits
- c) Muscles which Extend or Abduct the Thumb
What are the 3 Muscles which Extend and Abduct / Adduct the Hand at the Wrist Joint?
- Extensor Carpi Radialis Longus
- Extensor Carpi Radialis Brevis
- Extensor Carpi Ulnaris
Where are the Extensor Carpi Radialis Longus Positioned in the Posterior Forearm?
Laterally
Is the Extensor Carpi Radialis Longus an Anatomically Superficial or Deep Muscle of the Posterior Forearm?
Superficial
Where does the Extensor Carpi Radialis Longus Originate from?
Supracondylar Ridge of the Humerus
Where does the Extensor Carpi Radialis Longus attach distally?
- Metacarpal II
2. Metacarpal III
What is the function of the Extensor Carpi Radialis Longus?
- Extension of the Wrist
2. Abduction of the Wrist
What is the innervation of the Extensor Carpi Radialis Longus?
Radial Nerve
Where are the Extensor Carpi Radialis Brevis Positioned in the Posterior Forearm?
Laterally
Is the Extensor Carpi Radialis Brevis an Anatomically Superficial or Deep Muscle of the Posterior Forearm?
Superficial
Where does the Extensor Carpi Radialis Brevis Originate from?
Lateral Epicondyle of the Humerus