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General Anatomy (2nd year) > muscles of the forearm > Flashcards

muscles of the forearm Flashcards

(80 cards)

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1
Q

Pronator Teres Humeral Head Origin

A

medial epicondyle, deep antebrachial fascia

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2
Q

Pronator Teres Ulnar Head Origin

A

medial side of coronoid process of ulna,

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3
Q

Pronator Teres Insertion

A

midpoint of the lateral border of the radius, lateral border of muscle forms medial border of cubital fossa

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4
Q

Pronator Teres Action

A

pronation of forearm in rapid/forceful movement, works synergistically with pronator quadratus, flexion of elbow

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5
Q

Pronator Teres Nerve

A

Median Nerve C6-7

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6
Q

Flexor Carpi Radialis Origin

A

medial epicondyle, deep antebrachial fascia

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7
Q

Flexor Carpi Radialis Insertion

A

Palmar side of the base of second metacarpal, slip to base of third metacarpal

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8
Q

Flexor Carpi Radialis Action

A

Flexion of the radiocarpal joint, abduction/radial deviation of the radiocarpal joint when acting with radial extensors, assists in pronation of forearm, flexion of the elbow

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9
Q

Flexor Carpi Radialis Nerve

A

Median Nerve C6-8

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10
Q

Palmaris Longus Origin

A

medial epicondyle, deep antebrachial fascia

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11
Q

Palmaris Longus Insertion

A

distal end of flexor retinaculum, palmar aponeurosis

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12
Q

Palmaris Longus Action

A

flexion of the radiocarpal joint, tenses palmar fascia, flexion of the elbow, anchor for skin & fascia

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13
Q

Palmaris Longus Nerve

A

Median Nerve C6-8, T1

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14
Q

Flexor Carpi Ulnaris Humeral Head Origin

A

medial epicondyle

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15
Q

Flexor Carpi Ulnaris Ulnar Head Origin

A

Medial margin of olecranon process, upper 2/3 of posterior border of ulna (medial side), forms tenon in the lower half of the forearm

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16
Q

Flexor Carpi Ulnaris Insertion

A

pisiform, extended to hamate by pisohamate ligament, extended to base of 5th metacarpal by pisometacarpal ligament

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17
Q

Flexor Carpi Ulnaris Action

A

flexion of radiocarpal joint, adduction (ulnar deviation) of the hand, flexion of the elbow

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18
Q

Flexor Carpi Ulnaris Nerve

A

Ulnar nerve (C7-8, T1)

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19
Q

Flexor Digitorum Superficialis Radial Head Origin

A

anterior oblique line

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20
Q

Flexor Digitorum Superficialis Humero-Ulnar Head Origin

A

medial epicondyle of humerus, anterior band of UCL, medial side of coronoid process, deep antebrachial fascia

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21
Q

Flexor Digitorum Superficialis Insertion

A

sides of the shaft of the middle phalanx, tendons pass between the split superficialis tendon to insert on the bases of the distal phalanges

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22
Q

Flexor Digitorum Superficialis Action

A

flexion of PIP joints of digits 2-5, flexion of MP joints, flexion of radiocarpal joint

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23
Q

Flexor Digitorum Superficialis Nerve

A

Median Nerve C7-8, T1)

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24
Q

Flexor Digitorum Profundus Origin

A

upper 3/4 of medial & anterior border of ulna, anterior surface of ulnar half of interosseous membrane, deep antebrachial fascia, upper 3/4 posterior border of ulna with FCU & ECU

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25
Flexor Digitorum Profundus Insertion
palmar surfaces of bases of distal phalanges 2-5, thick mm that covers the anterior & meidal aspect of the ulna
26
Flexor Digitorum Profundus Action
flexion of DIP joint after flexion of PIP joint by FDS, flexion of the MCP & PIP joint, curling fingers & clenching fist, flexion of radiocarpal/wrist joint,
27
Flexor Digitorum Profundus Nerve
Anterior interosseous branch of median nerve C8, T1
28
Flexor Pollicis Longus Origin
anterior surface of radius, lateral 1/2 of anterior surface of interosseous membrane, medial border of coronoid process of ulna, may attach to medial epicondyle of humerus, tendon passes under flexor retinaculum, blends with FDP/FDS & PT
29
Flexor Pollicis Longus Insertion
palmar surface of base of distal phalanx of thumb
30
Flexor Pollicis Longus Action
flexion of IP joint of thumb, flexion of MCP joint of thumb, wrist flexion
31
Flexor Pollicis Longus Nerve
Anterior interosseous branch of median nerve C8, T1, travels on interosseous membrane between FPL & FDP
32
Pronator Quadratus Origin
oblique ridge on lower 1/4 of anterior medial surface of ulna, fibres pass laterally & slightly downward
33
Pronator Quadratus Insertion
distal 1/4 of anterior lateral border & anterior shaft of radius, deep fibres insert into triangular area just above ulnar notch
34
Pronator Quadratus Action
pronation of forearm, reinforced by pronator teres during rapid or forceful pronation, assists interosseous membrane in holding bones together during upward compressions (coaptation of radius & ulna)
35
Pronator Quadratus Nerve
Anterior Interosseous Branch of Mediam Nerve C8, T1
36
Brachioradialis Origin
Upper 2/3 of lateral supracondylar ridge of the humerus
37
Brachioradialis Insertion
flat tendon into lateral side of lower end of radius just above styloid process (mm belly ends at midpoint flat tendon continues)
38
Brachioradialis Action
flexion of the elbow, assists with pronation/supination in resisted movements, active during quick movement or resisted flexion, helps resist displacement of radial head when lifting weights
39
Brachioradialis Nerve
Radial Nerve C5-6
40
Supinator Deep Fibres Origin
supinator crest of ulna, most superior aspect of the interosseous broder of the ulna
41
Supinator Superficial Fibres Origin
lateral epicondyle of the humerus, radial collateral ligament of elbow joint, annular ligament of superior radio-ulnar joint
42
Supinator Insertion
lateral surface of proximal third of radius (above oblique line)
43
Supinator Action
supination of forearm, prime for slow unopposed supination
44
Supinator Nerve
Radial Nerve C5-7
45
Extensor Carpi Radialis Longus Origin
lateral epicondyle, lower 1/3 of suprcondylar ridge
46
Extensor Carpi Radialis Longus Insertion
dorsal aspect of base of 2nd MC
47
Extensor Carpi Radialis Longus Action
extension of the wrist joint, abduction of the wrist joint, radial deviation, assists in elbow flexion, ECRL is indispensable when clenching fist
48
Extensor Carpi Radialis Longus Nerve
Radial Nerve C5-8
49
Extensor Carpi Radialis Brevis Origin
lateral epicondyle, radial collateral ligament of elbow, deep antebrachial fascia
50
Extensor Carpi Radialis Brevis Insertion
dorsal aspect of base of 3rd MC, may send slip to 2nd MC with ECRL
51
Extensor Carpi Radialis Brevis Action
extension of the midcarpal joint, abduction/radial deviation of the midcarpal joint, helps stabilize wrist for powerful finger flexion
52
Extensor Carpi Radialis Brevis Nerve
Radial Nerve C6-8
53
Extensor Digitorum Communis Origin
lateral epicondyle, deep antebrachial fascia
54
Extensor Digitorum Communis Insertion
dorsal aspect of the base of the middle phalanx (medial four fingers 2-5), dorsal aspect on the base of the distal phalanx
55
Extensor Digitorum Communis Action
principle extensor of the MCP joints of digits 2.5, extension of IP joints of digits 2-5, assists in extension & abduction of wrist
56
Extensor Digitorum Communis Nerve
Posterior Interosseous Branch of the Radial Nerve (C7,8)
57
Extensor Digiti Minimi Origin
lateral epicondyle, deep antebrachial fascia, intermuscular septum
58
Extensor Digiti Minimi Insertion
dorsal aspect on the base of the middle & distal phalanx of the 5th finger, 2 slips branch off & attach on the dorsal aspect of the base of the distal phalanx, runs thru separated compartments of extensor retinaculum
59
Extensor Digiti Minimi Action
extension of 5th MCP joint, extension of IP joints of fifth finger
60
Extensor Digiti Minimi Nerve
Interosseous Branch of the Radial Nerve C6-8
61
Extensor Carpi Ulnaris Origin
lateral epicondyle, upper 2/3 of the posterior border of the ulna (posterior & lateral aspect)
62
Extensor Carpi Ulnaris Insertion
dorsal ulnar aspect of the base of the 5th MC, tendon passes in a groove between ulnar head & ulnar styloid, tendon felt just under styloid when wrist is flexed and extended
63
Extensor Carpi Ulnaris Action
extension of the midcarpal joint, adduction/ulnar deviation of the radiocarpal joint, needed for clenching fist with ECRL
64
Extensor Carpi Ulnaris Nerve
Posterior Interosseous Branch of the Radial Nerve (C6-8)
65
Abductor Pollicis Longus Origin
Middle 1/3 lateral aspect of the posterior surface of the ulna, middle 1/3 posterior interosseous membrane, middle 1/3 of the posterior medial surface of the radius (above EPL)
66
Abductor Pollicis Longus Insertion
radial side of the base of the first metacarpal of the thumb, trapezium
67
Abductor Pollicis Longus Action
abducts the carpo-metacarpal joint of the thumb, extension of the thumb at the CMC joint, flexes & radially deviates wrist
68
Abductor Pollicis Longus Nerve
Posterior Interosseous Branch of the Radial Nerve C7-8
69
Extensor Pollicis Brevis Origin
Posterior surface of the middle 1/3 of medial aspect radius (inferior origin ABPL), post. Interosseous membrane middle 1/3 (lateral to EPL), visible as an oblique elevation in the lower forearm
70
Extensor Pollicis Brevis Insertion
dorsal aspect of the base of the proximal phalanx of the thumb
71
Extensor Pollicis Brevis Action
extension of the MCP joint of the thumb, extension of CMC joint, abducts CMC joint, assists with radial deviation
72
Extensor Pollicis Brevis Nerve
Posterior Interosseous Branch of the Radial Nerve C7-8
73
Extensor Pollicis Longus Origin
Middle 1/3 of posterior lateral surface of the shaft of the ulna, posterior middle 1/3 of the interosseous membrane, travels around medial side of dorsal tubercle of the radius, travels through the 3r compartment
74
Extensor Pollicis Longus Insertion
base of the dorsal surface of the distal phalanx of the thumb (forms snuff box)
75
Extensor Pollicis Longus Action
extension of the IP joint of the thumb, extension of the MCP & CMC joint of the thumb, assists in wrist abduction & extension
76
Extensor Pollicis Longus Nerve
Posterior interosseous branch of the radial nerve C7-8
77
Extensor Indicis Origin
posterior lateral surface of the ulna of the middle 1/3 (below EPL), middle 1/3 of the posterior interosseous membrane
78
Extensor Indicis Insertion
base of the middle phalanx (dorsal), base of the distal phalanx (dorsal), tendon of EDC, passes under extensor retinaculum in 4th compartment with ED
79
Extensor Indicis Action
extension of the DIP & PIP joint of the index finger (w/lumbricals & interossei), extension of the MCP joint of the index finger, extension of the wrist joint
80
Extensor Indicis Nerve
Posterior Interosseous Branch of the Radial Nerve C7-8

General Anatomy (2nd year) (8 decks)

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