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Anatomy > Posterior Forearm Muscles > Flashcards

Posterior Forearm Muscles Flashcards

1
Q

What is the Location of Supinator

A

Floor of the Cubital Fossa

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2
Q

What are the Origins of the Supinator

A

Lateral Epicondyle, Radial Collateral and Anular Ligament, Proximal Ulna (Supinator fossa and Supinator crest)

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3
Q

What are the Insertions of Supinator

A

Posterior, Lateral and Anterior surfaces of the Proximal Radius

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4
Q

What is the Action of Supinator

A

Primary Supinator of the Forearm

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5
Q

What is the Innervation of Supinator

A

Radial Nerve

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6
Q

What is the Location of Extensor Carpi Ulnaris

A

Most Medial of the group, Tendon lies just Medial to the Ulnar Styloid Process at the Wrist

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7
Q

What are the Origins of Extensor Carpi Ulnaris

A

Humeral Head - CET

Ulnar Head - Posterior Border of the Ulna

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8
Q

What is the Insertion of Extensor Carpi Ulnaris

A

Base of the 5th Metacarpal

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9
Q

What are the Actions of Extensor Carpi Ulnaris

A

Extends wrist (with ECRL and ECRB) and Adducts the Wrist (with FCU)

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10
Q

What is the Innervation of Extensor Carpi Ulnaris

A

Radial Nerve

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11
Q

What is the Location of Abductor Pollicis Longus

A

Tendon travels in a common synovial sheath with Extensor Pollicis Brevis

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12
Q

What are the Origins of Abductor Pollicis Longus

A

Posterior surface of the Radius, Ulna and Interosseous Membrane

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13
Q

What is the Insertion of Abductor Pollicis Longus

A

Base of 1st Metacarpal

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14
Q

What are the Actions of Abductor Pollicis Longus

A

Abducts thumb, Assists with wrist and Thumb Extension

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15
Q

What is the Innervation of Abductor Pollicis Longus

A

Radial Nerve

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16
Q

What is the Location of Extensor Pollicis Longus

A

Tendon travels Medial to Lister’s Tubercle

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17
Q

What are the Origins of Extensor Pollicis Longus

A

Posterior surface of Ulna and Interosseous Membrane

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18
Q

What is the Insertion of Extensor Pollicis Longus

A

Base of Distal Phalanx of Thumb (only extensor muscle to attach here)

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19
Q

What are the Actions of Extensor Pollicis Longus

A

Extends the IP, and MCP joints of Thumb, Extends Wrist

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20
Q

What is the Innervation of Extensor Pollicis Longus

A

Radial Nerve

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21
Q

What is the Location of Extensor Carpi Radialis Brevis

A

Slightly Medial and Deep to ECRL, Lateral to Lister’s Tubercle on Radius

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22
Q

What is the Origin of Extensor Carpi Radialis Brevis

A

CET (Lateral Epicondyle of Humerus)

23
Q

What is the Insertion of Extensor Carpi Radialis Brevis

A

Base of the 3rd Metacarpal

24
Q

What are the Actions of Extensor Carpi Radialis Brevis

A

Extends and Abducts (radially deviates) the Wrist with ECRL

25
What is the Innervation of Extensor Carpi Radialis Brevis
Radial Nerve
26
What is the Location of Extensor Indicis
Medial to Extensor Pollicis Longus; Tendon travels Medial to Extensor Digitorum Tendon of the 2nd Digit
27
What are the Origins of Extensor Indicis
Posterior surface of Ulna and Interosseous Membrane
28
What is the Insertion of Extensor Indicis
Extensor expansion of the 2nd digit
29
What are the Actions of Extensor Indicis
Extends MCP, PIP and DIP Joints of the 2nd Digit, Assists Wrist Extension
30
What is the Innervation of Extensor Indicis
Radial Nerve
31
What is the Location of Extensor Digiti Minimi
Between Extensor Carpi Ulnaris and Extensor Digitorum
32
What is the Origin of Extensor Digiti Minimi
CET
33
What is the Insertion of Extensor Digiti Minimi
Extensor Expansion of Digit 5
34
What are the Actions of Extensor Digiti Minimi
Extends the 5th Digit at the MCP, PIP and DIP Joints
35
What is the Innervation of Extensor Digit Minimi
Radial Nerve
36
What is the Location of Extensor Digitorum
Medial to Extensor Carpi Radialis Brevis
37
What is the Origin of Extensor Digitorum
CET, Lateral Supracondylar Ridge on Humerus
38
What is the Insertion of Extensor Digitorum
By 4 Tendons (1 for each finger) that attach to the Extensor Expansion of Digits 2-5
39
What are the Actions of Extensor Digitorum
Primary Extensor of Fingers, Extends Wrist, Abducts Fingers
40
What is the Innervation of Extensor Digitorum
Radial Nerve
41
What is the Location of Extensor Carpi Radialis Longus
Tendon lies Lateral to Lister’s Tubercle on the Radius and ECRB
42
What is the Origin of Extensor Carpi Radialis Longus
Lateral Supracondylar Ridge of the Humerus (inferior to Brachioradialis)
43
What is the Insertion of Extensor Carpi Radialis Longus
Base of 2nd Metacarpal
44
What are the Actions of Extensor Carpi Radialis Longus
Extends and Abducts the Wrist
45
What is the Innervation of Extensor Carpi Radialis Longus
Radial Nerve
46
What is the Origin of Brachioradialis
Proximal 2/3 of Lateral Supracondylar Ridge of the Humerus
47
What is the Insertion of Brachioradialis
Lateral aspect of Distal Radius
48
What is the Action of Brachioradialis
Flexion of the Forearm at the Elbow when Forearm is semi-Pronated
49
What is the Innervation of Brachioradialis
Radial Nerve
50
What is the Location of Extensor Pollicis Brevis
Intermediate to EPL and APL
51
What are the Origins of Extensor Pollicis Brevis
Posterior surface of Distal Radius and Interosseous Membrane
52
What is the Insertion of Extensor Pollicis Brevis
Base of Proximal Phalanx of Thumb
53
What are the Actions of Extensor Pollicis Brevis
Extends Thumb at MCP Joint, Extends Wrist
54
What is the Innervation of Extensor Pollicis Brevis
Radial Nerve

Anatomy (30 decks)

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