4.1.1. Extensor and Abductor/Addutor Muscles of the Hand at the Wrist Joint Flashcards

1
Q

What are the Muscles of the Posterior Forearm commonly known as?

A

Extensor Muscles

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2
Q

What is the General Function of these Muscles?

A

To Produce Extension at the Wrists and Fingers

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3
Q

Which Nerve innervates the Muscles of the Posterior Forearm?

A

The Radial Nerve

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4
Q
  1. How many groups can the Muscles of the Posterior Forearm be Divided into, Anatomically?
  2. What are they?
A
  1. 2
  2. a) Superficial Muscles of the Posterior Forearm
  3. b) Deep Muscles of the Posterior Forearm
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5
Q
  1. How many groups can the Muscles of the Posterior Forearm be Divided into, Functionally?
  2. What are they?
A
  1. 3
  2. a) Muscles which Extend and Abduct / Adduct the Hand at the Wrist Joint
  3. b) Muscles which Extend the Medial 4 Digits
  4. c) Muscles which Extend or Abduct the Thumb
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6
Q

What are the 3 Muscles which Extend and Abduct / Adduct the Hand at the Wrist Joint?

A
  1. Extensor Carpi Radialis Longus
  2. Extensor Carpi Radialis Brevis
  3. Extensor Carpi Ulnaris
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7
Q

Where are the Extensor Carpi Radialis Longus Positioned in the Posterior Forearm?

A

Laterally

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8
Q

Is the Extensor Carpi Radialis Longus an Anatomically Superficial or Deep Muscle of the Posterior Forearm?

A

Superficial

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9
Q

Where does the Extensor Carpi Radialis Longus Originate from?

A

Supracondylar Ridge of the Humerus

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10
Q

Where does the Extensor Carpi Radialis Longus attach distally?

A
  1. Metacarpal II

2. Metacarpal III

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11
Q

What is the function of the Extensor Carpi Radialis Longus?

A
  1. Extension of the Wrist

2. Abduction of the Wrist

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12
Q

What is the innervation of the Extensor Carpi Radialis Longus?

A

Radial Nerve

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13
Q

Where are the Extensor Carpi Radialis Brevis Positioned in the Posterior Forearm?

A

Laterally

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14
Q

Is the Extensor Carpi Radialis Brevis an Anatomically Superficial or Deep Muscle of the Posterior Forearm?

A

Superficial

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15
Q

Where does the Extensor Carpi Radialis Brevis Originate from?

A

Lateral Epicondyle of the Humerus

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16
Q

Where does the Extensor Carpi Radialis Brevis attach distally?

A
  1. Metacarpal II

2. Metacarpal III

17
Q

What is the function of the Extensor Carpi Radialis Brevis?

A
  1. Extension of the Wrist

2. Abduction of the Wrist

18
Q

What is the innervation of the Extensor Carpi Radialis Brevis?

A

Radial Nerve

19
Q

Where are the Extensor Carpi Ulnaris Positioned in the Posterior Forearm?

A

Medially

20
Q

Is the Extensor Carpi Ulnaris an Anatomically Superficial or Deep Muscle of the Posterior Forearm?

A

Superficial

21
Q

Where does the Extensor Carpi Ulnaris Originate from?

A

Lateral Epicondyle of the Humerus

22
Q

Where does the Extensor Carpi Ulnaris attach distally?

A

Base of Metacarpal V

23
Q

What is the function of the Extensor Carpi Ulnaris?

A
  1. Extension of the Wrist

2. Adduction of the Wrist

24
Q

What is the innervation of the Extensor Carpi Ulnaris?

A

Radial Nerve

25
Q

Which Muscle of the Anterior Compartment of the Forearm helps with Extensor Carpi Radialis Longus and Brevis with Abduction?

A

Flexor Carpi Radialis