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Muscles Flashcards

1
Q

Pec Major INSERTION

A

Lateral lip of bicciptal groove

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2
Q

Pec Major Innervation

A

lateral and medial pectoral nerves

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3
Q

Pec Major Action

A

Adduction and medial rotation of humerus, Clavicular head = flexes humerus, Sternocostl head = extends humerus from flexed posiiton

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4
Q

Pec Minor ORIGIN

A

ribs 3,4,5

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5
Q

Pec Minor INSERTION

A

Coracoid process of scapula

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6
Q

Pec Minor Innervation

A

Medial pectoral nerve

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7
Q

Pec Minor Action

A

Stablises the scapula and acts as an accessroy muscle of respiration when pectoral girdle is fixed

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8
Q

Serratus Ant. ORIGIN

A

External surfaces of ribs 1-8

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9
Q

Serratus Ant. INSERTION

A

Ant. surface of medial scapular border

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10
Q

Serratus Ant. Innervation

A

long thoracic n

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11
Q

Serratus ant. Action

A

Protracts the scapula and holds it to the thoracic wall when punching or reaching object anteriorly
Rotates the scapula

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12
Q

Trapezius ORIGIN

A

Superior nuchal line, nuchal ligament spinous processes of C7-T12 vertebrae

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13
Q

Trapezius INSERTION

A

Lateral 1/3 of the clavicle, acromion and spine of the scapula

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14
Q

Trapezius innervation

A
  • Spinal root of accessory nerve (CNXI)-motor fibres
    Cervical nerves C3 and C4
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15
Q

Trapezius action (superior, middle and inferior fibres)

A
  • Elevates the scapula (superior fibres)
  • Retracts the scapula (middle fibres)
    Depresses the scapula (inferior fibres)
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16
Q

Latissimus Dorsi ORIGIN

A

Spinous processes of the T7-T12 vertebra, thoracolumbar fascia, iliac crest, lower 4 ribs

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17
Q

Latissimus Dorsi INSERTION

A

Floor of the intertubercular groove/bicipital groove of the the humerus (mnemoic - lady btw 2 majors)

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18
Q

Latissimus dorsi innervation

A

thoracocdorsal n

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19
Q

Lat Dorsi Action

A

Extension, adduciton and medial rotation of humerus.

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20
Q

Levator Scapulae Origin

A

Transverse processes of C1-4

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21
Q

Levator Scapulae Insertion

A

Superior medial border of scapula

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22
Q

Levator scapulae innervation

A

dorsal scapular n

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23
Q

Rhomboids innervation

A

dorsal scapular n

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24
Q

Levator scapulae action

A

elevates scapula

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25
Q

Rhomboids action

A

retracts scapula and rotate scpaula

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26
Q

Deltoid ORIGIN

A

Lateral 1/3 of clavicle, acromion and spine of scapula

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27
Q

Deltoid INSERTION

A

deltoid tuberosity of humerus

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28
Q

deltoid innervation

A

axillary

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29
Q

Anterior fibres of deltoid Action

A

flexes arm (assisted by pec major)

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30
Q

Middle fibres of deltoid action

A

abdution of the arm after 15 degrees

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31
Q

posterior fibres of detloid action

A

extend arm

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32
Q

Teres major origin

A

inferior border of scapular

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33
Q

teres major insertion

A

intertubercular groove

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34
Q

teres major innervation

A

lower scapular nerve

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35
Q

teres major action

A

adduction and medial rotation of arm at shoulder j

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36
Q

supraspinatus origin

A

supraspinous fossa

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37
Q

supraspinatus insertion

A

greater tubercle of humerus

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38
Q

supraspinatus innervation

A

suprascapular n

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39
Q

infraspinatus origin

A

infraspinous fossa

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40
Q

infraspinatus insertion

A

greater tubercle of humerus

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41
Q

infraspinatus innervation

A

suprascapular n

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42
Q

supraspinatus action

A

abducts the arm first 15 degrees

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43
Q

infraspinatus action

A

lateral rotator of arm at shoulder j

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44
Q

teres minor origin

A

superior part of lateral scapular border

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45
Q

teres minor insertion

A

greater tubercle of humerus

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46
Q

teres minor innervation

A

axillary n

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47
Q

teres minor action

A

lateral rotator of arm at shoulder j

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48
Q

subscapularis origin

A

subscapular fossa

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49
Q

subscapularis insertion

A

lesser tubercle of humerus

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50
Q

subscapularis innervation

A

upper and lower subscapular n

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51
Q

subscapularis action

A

medial rotation

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52
Q

biceps brachii origin (long and short head)

A

long head = supraglenoid tubercle of scapula, short head = coracoid process of scapula

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53
Q

biceps brachiii insertion

A

radial tuberosity

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54
Q

biceps brachii innervation

A

musculocutaneous n

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55
Q

biceps brachii action

A

flexor at elbow, supinator of the forearm

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56
Q

coracobrachialis origin

A

coracoid process

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57
Q

coracobrachilais inerstion

A

midshaft of humerus

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58
Q

coracobrachililis innervation

A

musculocutaneous n

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59
Q

coracobrachialis action

A

weak flexor and adductor of the arm

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60
Q

brachialis origin

A

midshaft of humerus

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61
Q

brachialis insertion

A

ulnar tuberosity

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62
Q

brachialis innervation

A

musculocutaneous

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63
Q

brachialis action

A

chief flexor of the forearm

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64
Q

what is the chief flexor of the forearm

A

brachialis

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65
Q

triceps brachii origin (long, medial and lateral heads)

A

long head: infraglenoid tubercle

Medial head: posterior surface of humerus, inferior to the radial groove

Lateral head: posterior surface of the humerus, superior to radial groove

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66
Q

triceps brachii insertion

A

olecranon process

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67
Q

triceps innervation

A

radial n

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68
Q

triceps action

A
  • Chief extensor of the forearm
    Long head stabilises the head of humerus in arm when abducted
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69
Q

pronator teres origin

A

medial epicondyle of humerus

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70
Q

pronator teres insertion

A

midshaft of radius

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71
Q

pronator teres innervation

A

median

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72
Q

pronator teres action

A

pronator

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73
Q

flexor carpi radialis origin

A

medial epicondyle of humerus

74
Q

FCR insertion

A

The base of the 2nd metacarpal bone

75
Q

FCR innervation

76
Q

FCR action

A

Flexes and abducts the hand at the wrist

Also helps with flexion at the elbow

77
Q

palmaris longus innervation

78
Q

palmaris longus action

A

Flexes hand at wrist and tightness palmar aponeurosis
Very weak

79
Q

FCU origin

A

medial epicondyle of humerus

80
Q

FCU insertion

A

Pisiform, hook of hamate and 5th metacarpal bone

81
Q

FCU innervation

82
Q

FCU action

A

Flexes and adducts hand at the wrist joint

83
Q

Flexor digitorum superficialis origin

A

Medial epicondyle of humerus, coronoid process of ulna and anterior border of radius

84
Q

Flexor digitorum superficialis insertion

A

`middle phalanx of the medial 4 digits

85
Q

Flexor digitorum superficialis innervation

86
Q

Flexor digitorum superficialis action

A

flexion of the middle phalanges at proximal interphalangeal joints, flexion of proximal phalanges at metacarpophalangeal joints

87
Q

flexor pollicis longus origin

A

Anterior surface of the radius and interosseous membrane

88
Q

flexor pollicis longus insertion

A

base of distal phalanx of thumb

89
Q

flexor pollicis longus innervation

90
Q

flexor pollicis longus movement

A

flexes phalanges of thumb

91
Q

flexor digitorum profundus origin

A

Proximal anterior surface of the ulna

92
Q

flexor digitorum profundus insertion

A

Base of distal phalanges of medial four digits

93
Q

flexor digitorum profundus innervation

A

Median + medial 1/2 of FDP innervated by the ulnar n

94
Q

flexor digitorum profundus movement

A

Flexes distal phalanges at distal interphalangeal joints, metacarpophalangeal joints, and assist in flexion of hand

95
Q

pronator quadratus origin

A

Anterior aspect of distal one quarter of ulna

96
Q

pronator quadratus insertion

A

distal anterior surfaces of radial and ulna

97
Q

pronator quadratus innervation

98
Q

brachioradialis origin

A

supracondylar ridge of humerus

99
Q

brachioradialis insertion

A

lateral surface of distal radius

100
Q

brachioradialis innervation

101
Q

brachioradialis action

A

Flexor of the forearm at the elbow

102
Q

Extensor carpi radialis longus and brevis
origin

A

lateral epicondyle

103
Q

Extensor carpi radialis longus and brevis
insertion

A

2nd and 3rd base of metacarpal

104
Q

Extensor carpi radialis longus and brevis
innervation

A

Deep branch of radial n

105
Q

Extensor carpi radialis longus and brevis
action

A

Extensor - when acting in synergy with flexor carpi radialis the muscles act as abductors at the wrist. This movement is limited to approx. 15 degrees due to the long styloid process

106
Q

ECU origin

A

lateral epicondyle

107
Q

ECU insertion

A

base of 5th metacarpal

108
Q

ECU innervation

A

Deep branch of radial n

109
Q

ECU movement

A

Extensor - when acting together with flexor carpi ulnaris the muscles produce adduction at the wrist joint

110
Q

extensor digitorum origin

A

lateral epicondyle

111
Q

extensor digitorum insertion

A

extensor expansion of medial 4 digits

112
Q

Extensor digitorum nerve

A

Deep branch of radial n

113
Q

Extensor digitorum movement

A

extensor
- On the distal ends of the metacarpals along the phalanges of the medial four digits the tendons flattened to form extensor expanison
- Each extensor expansion diivdes into medial band and two lateral bands
Lumbrical and dorsal interossei muscles are attachign to the medial band

114
Q

Extensor digiti minimi origin

A

lateral humeral epicondyle

115
Q

Extensor digiti minimi insertion

A

Extensor expansion of the 5th digit. It extends 5th digit primarily at metacarpophalangeal joint secondarily at IPJ

116
Q

Extensor digiti minimi innervation

A

Deep branch of radial n

117
Q

Extensor digiti minimi action

118
Q

supinator origin

A

lateral epicondyle of humerus

119
Q

supinator insertion

A

proximal radius

120
Q

supinator innervation

A

deep branch of radial n

121
Q

supinator action

A

supination

122
Q

abductor pollicis longus origin

A

Posterior surface of proximal half of radius, ulna and interosseus membrane

123
Q

abductor pollicis longus insertion

A

Base of metacarpal bone 1, (trapezium bone)

124
Q

abductor pollicis longus innervation

A

Posterior interosseus nerve (continuation of the deep branch of radial n)

125
Q

abductor pollicis longus action

A

Abducts and extends thumb at carpometacarpal joint

126
Q

Extensor pollicis brevis origin

A

Posterior surface of distal third of radius and interosseus membrane

127
Q

Extensor pollicis brevis insertion

A

Posterior aspect of base of proximal phalanx of thumb

128
Q

Extensor pollicis brevis innervation

A

Posterior interosseus nerve (continuation of the deep branch of radial n)

129
Q

Extensor pollicis brevis action

A

Extends proximal phalanx of thumb at carpometacarpal joint

130
Q

Extensor pollicis longus origin

A

Posterior surface of middle third of ulna and interosseus membrane

131
Q

Extensor pollicis longus insertion

A

Posterior aspect of base of distal phalanx of thumb

132
Q

Extensor pollicis longus innervation

A

Posterior interosseus nerve (continuation of the deep branch of radial n)

133
Q

Extensor pollicis longus action

A

Extends distal phalanx of thumb at both metacarpophalangeal and interphalangeal joint

134
Q

extensor indicis origin

A

Posterior surface of distal third of ulna and interosseus membrane

135
Q

extensor indicis insertion

A

Extensor expansion of index finger

136
Q

extensor indicis nerve

A

Posterior interosseus nerve (continuation of the deep branch of radial n)

137
Q

extensor indicis action

A

Wrist joints: Weak hand extension
Metacarpophalangeal and interphalangeal joints of index finger: Finger extension

138
Q

palmaris brevis origin

A

palmar aponeurosis, flexor retinaculum

139
Q

palmaris brevis insertion

A

Dermis of skin of hypothenar region

140
Q

palmaris brevis innervation

141
Q

palmaris brevis action

A

improves grip

142
Q

abductor pollicis brevis origin

A

trapezium, flexor retinaculum

143
Q

abductor pollicis brevis insertion

A

Proximal phalanx, extensor hood of the thumb

144
Q

abductor pollicis breivs innervation

145
Q

abductor pollicis brevis action

A

abducts thumb at metacarpophalangeal j

146
Q

flexor pollicis brevis origin

A

Trapezium, flexor retinaculum

147
Q

flexor pollicis brevis insertion

A

prox phalanx of the thumb

148
Q

flexor pollicis brevis innervation

149
Q

flexor policis brevis action

A

flexes thumb at metacarpophalangeal j

150
Q

opponens pollicis origin

A

Trapezium, flexor retinaculum

151
Q

opponens pollicis insertion

A

1st metacapral

152
Q

opponens pollicis innervation

153
Q

opponens pollicis action

A

Draws 1st metacarpal bone medially to oppose thumb and rotates it medially

154
Q

Abductor digiti minimi (hypothenar muscle) origin

A

Pisiform tendon of flexor carpi ulnaris

155
Q

Abductor digiti minimi (hypothenar muscle)
insertion

A

Proximal phalan, extensor hood of little finger

156
Q

Abductor digiti minimi (hypothenar muscle)
innervation

157
Q

Abductor digiti minimi (hypothenar muscle)
action

A

Abducts little f. at metacarpophalangeal j

158
Q

Flexor digiti minimi brevis (hypothenar muscle)
origin

A

Hamate, flexor retinaculum

159
Q

Flexor digiti minimi brevis (hypothenar muscle)
insertion

A

Proximal phalanx of little f.

160
Q

Flexor digiti minimi brevis (hypothenar muscle)
innervation

161
Q

Flexor digiti minimi brevis (hypothenar muscle)
action

A

Flexes little f. at metacarpophalangeal j

162
Q

Opponens digiti minimi (hypothenar muscle)
origin

A

Hamate, flexor retinaculum

163
Q

Opponens digiti minimi (hypothenar muscle)
innervation

164
Q

Opponens digiti minimi (hypothenar muscle)
action

A

lateral rotation of the little finger

165
Q

adductor pollicis origin

A

Transverse head: metacarpal 3
Oblique head: capitate, metacarpals 2 and 3

166
Q

adductor policis insertion

A

Proximal phalanx, extensor hood of the thumb

167
Q

adducotr pollicis innervation

168
Q

adductor pollicis action

A

adduts thumb

169
Q

lumbricals (1-4) origin

A

Tendons of flexor digitorum profundus

170
Q

lumbricals (1-4) insertion

A

Extensor hoods of medial 4 fingers

171
Q

lumbircals 1-4 innervation

A

Medial two - ulnar n
Lateral two - median n

172
Q

lumbricals 1-4 action

A

Flex MCP joint while extending interphalangeal jl

173
Q

dorsal interossei origin

A

adjacent shafts of metacarpals

174
Q

Dorsal interossei insertion

A

Extesnor hood and base of proximal phalanges of index, middle and ring fingers

175
Q

Dorsal interossei innervation

176
Q

Dorsal interossei action

A

Abduct infex, middle and ring fingers

DAB
D- dorsal
AB - abduction

177
Q

Palmar interossei
origin

A

Shafts of metacarpals

178
Q

palmar interossei insertion

A

Extensor hoods of thumb, index, ring an little fingers, proximal phalanx of thumb

179
Q

palmar interossei innervation

180
Q

palmar interossei action

A

Adduct thumb, index, ring, little fingers

musculo (3 decks)

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