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Functional Anatomy > Forearm Muscles > Flashcards

Forearm Muscles Flashcards

(59 cards)

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0
Q

Origin and insertion of Pronator Teres

Two heads

A

O- medial head- coronoid process
Humeral head- medial epicondyle
I- middle convex of lateral surface of radius (distal to supinator insertion)

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1
Q

Name the flexor/pronation muscles

  • superficial
  • intermediate
  • deep
A

Superficial- Pronator Teres, Flexor Carpi Radialis, Palmaris longus, Flexor Carpi ulnaris

Intermediate- Flexor digitorum superficialis

Deep - Flexor digitorum Profundus, Flexor pollicis longus, Pronator Quadratus

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2
Q

Innervation of Pronator Teres

A

Median nerve

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3
Q

Action of Pronator Teres

A

Probated and flexes forearm at elbow

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4
Q

Origin and insertion of Flexor Carpi Radialis

A

O- medial epicondyle of humerus

I- base of 2nd metacarpal

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5
Q

Innervation of FCR

A

Median nerve

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6
Q

Action of FCR

A

Flexes and abducts hand at wrist

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7
Q

Origin and insertion of Palmaris longus

A

O- medial epicondyle of humerus

I- distal half of flexor-retina cultus and apex of palmar aponeurosis

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8
Q

Innervation of Palmaris longus

A

Median nerve

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9
Q

Action of Palmaris longus

A

Flexes hand at wrist and tenses palmar aponeurosis

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10
Q

Origin and insertion of flexor Carpi ulnaris (humeral and ulnar head)

A

O- humeral head- medial epicondyle of humerus
Ulnar head- olecranon and posterior border of ulna
I- pisiform, hook of hamate, 5th metacarpal

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11
Q

Innervation of FCU

A

Ulnar nerve

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12
Q

Action of FCU

A

Flexes and adducts hand at wrist

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13
Q

Origin and insertion of flexor Carpi superficialis

Humeral head and radial head

A

O- humeral head- medical epicondyle and coronoid process
Radial head- superior half of anterior border
I- shafts of middle phalanges (medial digits)

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14
Q

Innervation of FDS

A

Median nerve

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15
Q

Action of FDS

A

Flexes middle phalanges at proximal interphalangeal joints of middle 4 digits; acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints

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16
Q

Origin and insertion of Flexor Digitorum Profundus

A

O- proximal 3/4 of medial and anterior ulna and interosseous membrane
I- medial part- bases of distal phalanges of 4-5th digits
Lateral part - bases of distal phalanges at 2-3rd digits

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17
Q

Innervation of FDP

Medial and lateral part

A

Lateral part- median nerve

Medial part- ulnar nerve

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18
Q

Action of FDP

A

Flexes distal phalanges of 2-5th distal interphalangeal joints

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19
Q

Origin and insertion of flexor pollicis longus

A

O- anterior surface if radius and interosseous membrane

I- base of distal phalanx of thumb

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20
Q

Innervation of FPL

A

Median nerve

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21
Q

Action of FPL

A

Flexes phalanges of 1st digit

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22
Q

Origin and insertion of Pronator Quadratus

A

O- distal quarter of anterior surface of ulna

I- distal quarter of anterior surface of radius

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23
Q

Numeration of Pronator Quadratus

24
Action of Pronator Quadratus
Pronator the arm Deep fibers bind ulna and radius together
25
Name the extensor/supinator muscles | Superficial deep and outcropping
Superficial- brachioradialis, extensor Carpi Radialis longus, extensor Carpi Radialis brevis , extensor digitorum, extensor digitiminimi, extensor Carpi ulnaris. Deep- supinator, extensor indices Outcropping (deep layer) - abductor pollicis longus, extensor pollicis brevis and extensor pollicis longus, = snuff box
26
Origin and insertion of brachioradialis
O- proximal 2/3 of lateral supra-epicondylar ridge | I- lateral surface/distal end of radius-proximal to styloid process
27
Innervation of brachioradialis
Radial nerve
28
Action of brachioradialis
Relatively weak flexion of forearm (maximal when forearm is in mid probated position)
29
Origin and insertion of extensor Carpi Radialis longus
O- lateral supra-epicondylar ridge of humerus | I- dorsal base of 2nd metacarpal
30
Innervation if ECRL
Radial nerve
31
Action of ECRL
Extends and abducts hand at the wrist joint | Active during fist clenching
32
Origin and insertion of Extensor Carpi Radialis Brevis
O- Lateral epicondyle of humerus | I- Dorsal aspect of base of 3rd metacarpal
33
Innervation of ECRB
Radial nerve
34
Action of ECRB
Extends and abducts hand (works with ECRL)
35
Origin and insertion of extensor digitorum
O- lateral epicondyle of humerus | I- Extensor expansions of medial 4 digits
36
Innervation of ED
Radial nerve
37
Action of ED
Extends medial 4 digits primarily at metacarpophalangeal joints, secondarily at interphalangeal joints
38
Origin and insertion of Extensir Digiti Minimi
O- lateral epicondyle of humerus | I- extensor expansions of 5th digit
39
Innervation of EDM
Radial nerve
40
Action of EDM
Extends 5th digit primarily at metacarpophalangeal joint, secondarily at Interphalangeal joint
41
Origin and insertion of Extensor Carpi ulnaris
O- lateral epicondyle of humerus, posterior border of ulna. | I- dorsal aspect of base of 5th metacarpal
42
Innervation of ECU
Radial nerve
43
Action of Extensor Carpi Ulnaris
Extends and adducts hand at wrist joint | Also active during fist clenching
44
Origin and insertion of Supinator muscle
O- lateral epicondyle of humerus, radial collateral and angular ligaments. Crest of ulna I- lateral, posterior and anterior surface of proximal 3rd of radius
45
Innervation of supinator
Radial nerve
46
Action of supinator
Supinate forearm
47
Origin and insertion of extensor indices
O- posterior surface of distal 3rd of ulna and interosseous membrane I- Extensor expansion of 2nd digit
48
Innervation of extensor indices
Radial nerve
49
Action of extensor indices
Extends 2nd digit Enables independent expansion Helps extend hand at wrist
50
Origin and insertion of abductor pollicis longus
O- posterior surface of proximal halves of ulna radius and interosseous membrane I- base of 1st metacarpal
51
Innervation of APL
Radial nerve
52
Action of APL
Abducts thumb and extends it at carpometacarpal joint
53
Origin and insertion of extensor pollicis brevis
O- posterior surface of distal 3rd of ulna and interosseous membrane I- dorsal aspect of base of proximal phalanx of thumb
54
Innervation of EPB
Radial nerve
55
Action of EPB
Extends proximal phalanxes of thumb at metacarpophalangeal joint, extends carpometacarpal joint
56
Origin and insertion of extensor pollicis longus
O- posterior surface of middle 3rd of ulna and interosseous membrane I- dorsal aspect of base of distal phalanx of thumb
57
Innervation of EPL
Radial nerve
58
Action EPL
Extends distal phalanx of thumb at interphalangeal , metacarpophalangeal joint; extends carpometacarpal joint

Functional Anatomy (18 decks)

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