20. Anterior Forearm and Wrist Flashcards

1
Q

Name the muscles in each layer of the anterior compartment of the forearm

A

Superficial - pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris
Intermediate - flexor digitorum superficialis
Deep - pronator quadratus, flexor digitorum profundus, flexor pollicus longus

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2
Q

Where is the common flexor orgin?

A

Medial epicondyle of humerus

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3
Q

What nerve supplies the majority of the muscles of the forearm? What are the exceptions to this?

A

Median nerve (C7, C8)

EXCEPT - flexor carpi ulnaris and ring/little finger side of flexor digitorum profundus (ulnar nerve)

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4
Q

What is the most superficial muscle of the anterior compartment of the forearm?

A

Palmaris longus

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5
Q

Insertion of palmaris longus?

A

Palmar fascia (aponeurosis)

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6
Q

Function of palmaris longus?

A

Tighten apouneurosis

Aids wrist in flexion

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7
Q

Origins of pronator teres?

A

Superficial head -Medial epicondyle of humerus

Deep head - coronoid process of ulna

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8
Q

Insertion of pronator teres?

A

Lateral surface of radius

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9
Q

What nerve runs through the heads of pronator teres?

A

Median nerve

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10
Q

Function of pronator teres?

A

Pronation

Also assists elbow flexion

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11
Q

Insertion of flexor carpi ulnaris?

A

Base of pisiform, hamate and 5th metacarpal

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12
Q

Function of flexor carpi ulnaris?

A

Wrist adduction and flexion

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13
Q

Innervation of flexor carpi ulnaris?

A

Ulnar nerve C7-C8

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14
Q

Insertion of flexor carpi radialis?

A

Base of 2nd metacarpal

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15
Q

Function of flexor carpi radialis?

A

Abduction of wrist and flexion

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16
Q

Innervation of flexor carpi radialis?

A

Median nerve C6-C7

17
Q

Origin of flexor digitorum superficialis?

A

Medial epicondyle of humerus

Coronoid process of ulna

18
Q

Insertion of flexor digitorum superficialis?

A

Middles phalanges of digits 2-5

19
Q

Function of flexor digitorum superficialis?

A

Flexion of MCP and PIP joints

Flexion of wrist

20
Q

Origin of flexor digitorum profundus?

A

Ulna and interosseous membrane

21
Q

Function of flexor digitorum profundus?

A

Flexion of MCP, PIP and DIP of digits 2-5

Flexion of wrist

22
Q

Innervation of flexor digitorum profundus?

A

Ring and little finger - ulnar nerve C8, T1

Index and middle finger - anterior interosseous branch of median nerve C8, T1

23
Q

Origin of pronator quadratus?

A

Distal anterior ulnar

24
Q

Insertion of pronator quadratus?

A

Distal anterior radius

25
Q

Function of pronator quadratus?

A

Pronation

Stabilises the distal radioulnar joint

26
Q

Innervation of pronator quadratus?

A

Anterior interosseous branch of median nerve C8, T1

27
Q

What nerve runs through the carpal tunnel?

A

Median nerve

28
Q

What nerve runs above the carpal tunnel?

A

Ulnar nerve

29
Q

Name the carpal bones

A
Scaphoid
Lunate
Triquetral
Pisiform
TrapeziUM (under thUMb)
Trapezoid
Capitate
Hamate

(Some Lovers Try Positions That They Can’t Handle)

30
Q

Which two structures are attached via the flexor retinaculum?

A

Thenar and hypothenar structures