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Skeletal Muscles-OAIN > Anatomy- OAIN Upper > Flashcards

Anatomy- OAIN Upper Flashcards

1
Q

Pectoralis Major- Origin

A

1) clavicular portion- clavicle
2) sternal-costal portion- sternum and upper ribs
3) abdominal portion- tendon of external oblique muscle

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2
Q

Pectoralis Major- Insertion

A

greater tubercle- intertubercular groove/humerus

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3
Q

Pectoralis Major- Action

A

1) entire muscle- adduction and medial rotation of humerus (medial rotation against resistance)
2) entire muscle- forced inspiration by elevating the rib cage when humerus is fixed
3) clavicular portion- flexes humerus at shoulder joint
4) sternocostal portion- extends humerus at shoulder joint (when humerus is in a flexed position)

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4
Q

Pectoralis Major- Nerve

A

Medial Pectoral Nerve

Lateral Pectoral Nerve

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5
Q

Pectoralis Minor- Origin

A

upper ribs

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6
Q

Pectoralis Minor- Insertion

A

coracoid process/scapula

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7
Q

Pectoralis Minor- Action

A

1) involved with protraction/abduction of scapula

2) elevates ribcage and this involved with forced inspiration

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8
Q

Pectoralis Minor- Nerve

A

Medial Pectoral Nerve

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9
Q

Subclavian- Origin

A

first rib

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10
Q

Subclavian- Insertion

A

subclavian groove/clavicle

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11
Q

Subclavian- Action

A

1) moves clavicle medially

2) acts as a protective cushion between clavicle and subclavian vessels

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12
Q

Subclavian- Nerve

A

Nerve to the Subclavius

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13
Q

Trapezius- Origin

A

1) superior nuchel line/occiput
2) external occipital protuberance
3) ligamentum nuchae
4) spines of the thoracic vertebrae

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14
Q

Trapezius- Insertion

A

1) clavicle

2) acromion process and spine/scapula

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15
Q

Trapezius- Action

A

1) stabilizes the scapula (holds it in normal anatomical position)
2) upper portion- elevates scapula
3) middle and lower portions- adduct/retract scapula

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16
Q

Trapezius- Nerve

A

Motor- Spinal Accessory Nerve (Cranial Nerve XI)

Sensory- C4 and C5

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17
Q

Rhomboid Major- Origin

A

spine/upper thoracics

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18
Q

Rhomboid Major- Insertion

A

vertebral border/scapula

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19
Q

Rhomboid Major- Action

A

1) elevate and adduct/retract scapula

2) helps stabilize scapula

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20
Q

Rhomboid Major- Nerve

A

Dorsal Scapular Nerve

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21
Q

Rhomboid Minor- Origin

A

spine/lower cervical and T1

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22
Q

Rhomboid Minor- Insertion

A

vertebral border/scapula

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23
Q

Rhomboid Minor- Action

A

1) elevate and adduct/retract scapula

2) helps stabilize scapula

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24
Q

Rhomboid Minor- Nerve

A

Dorsal Scapular Nerve

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25
Q

Levator Scapula- Origin

A

transverse processes/upper cervical vertebrae

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26
Q

Levator Scapula- Insertion

A

superior angle/scapula

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27
Q

Levator Scapula- Action

A

1) elevate scapula
2) adduct/retract scapula
3) stabilize scapula

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28
Q

Levator Scapula- Nerve

A

Dorsal Scapular Nerve

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29
Q

Latissimus Dorsi- Origin

A

1) spines/lower thoracic and lumbar vertebrae
2) thoracodorsal fascia
3) crest of the ilium

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30
Q

Latissimus Dorsi- Insertion

A

intertubercular groove (lesser tubercle)

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31
Q

Latissimus Dorsi- Action

A

1) extend, adduct and medially rotate the humerus

2) involved with forced expiration

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32
Q

Latissimus Dorsi- Nerve

A

Thoracodorsal Nerve

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33
Q

Serratus Anterior- Origin

A

upper ribs

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34
Q

Serratus Anterior- Insertion

A

vertebral border/scapula

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35
Q

Serratus Anterior- Action

A

1) abduction/protraction of scapula
2) stabilizes the scapula
3) involved with forced inspiration (only when humerus is abducted)

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36
Q

Serratus Anterior- Nerve

A

Long Thoracic

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37
Q

Deltoid- Origin

A

1) anterior/clavicular portion- clavicle
2) middle/acromial portion- acromion process of scpula
3) posterior portion- spinous process of scapula

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38
Q

Deltoid- Insertion

A

deltoid tuberosity/humerus

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39
Q

Deltoid- Action

A

1) anterior portion- flex and medially rotate arm
2) middle portion- abducts arm
3) posterior portion- extend and laterally rotate arm

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40
Q

Deltoid- Nerve

A

Axillary Nerve

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41
Q

Supraspinatus- Origin

A

supraspinous fossa/scapula

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42
Q

Supraspinatus- Insertion

A

greater tuberosity/humerus

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43
Q

Supraspinatus- Action

A

1) initiates abduction of arm
2) helps laterally rotate humerus
3) helps stabilize shoulder joint

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44
Q

Supraspinatus- Nerve

A

Suprascapular Nerve

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45
Q

Infraspinatus- Origin

A

infraspinous fossa/scapula

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46
Q

Infraspinatus- Insertion

A

greater tuberosity/humerus

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47
Q

Infraspinatus- Action

A

1) laterally rotates humerus

2) stabilizes shoulder joint

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48
Q

Infraspinatus- Nerve

A

Suprascapular Nerve

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49
Q

Subscapularis- Origin

A

subscapular fossa/scapula

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50
Q

Subscapularis- Insertion

A

lesser tuberosity/humerus

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51
Q

Subscapularis- Action

A

1) medially rotates humerus

2) stabilizes shoulder joint

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52
Q

Subscapularis- Nerve

A

Upper Subscapular Nerve

Lower Subscapular Nerve

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53
Q

Teres Major- Origin

A

inferior angle/scapula

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54
Q

Teres Major- Insertion

A

intertubercular groove (lesser tuberosity)

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55
Q

Teres Major- Action

A

1) adducts humerus
2) stabilizes shoulder joint
3) medially rotates humerus

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56
Q

Teres Major- Nerve

A

Lower Subscapular Nerve

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57
Q

Teres Minor- Origin

A

axillary border/scapula

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58
Q

Teres Minor- Insertion

A

greater tuberosity/humerus

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59
Q

Teres Minor- Action

A

1) laterally rotates humerus

2) stabilizes shoulder joint

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60
Q

Teres Minor- Nerve

A

Axillary Nerve

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61
Q

Biceps Brachii- Origin

A

1) short head- coracoid process of scapula

2) long head- supraglenoid tubercle/scapula

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62
Q

Biceps Brachii- Insertion

A

1) tubersoity/radius

2) shaft/ulna

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63
Q

Biceps Brachii- Action

A

flexion of forearm, supinates the radius (prime mover)

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64
Q

Biceps Brachii- Nerve

A

Musculocutaneous Nerve

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65
Q

Coracobrachialis- Origin

A

coracoid process/scapula

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66
Q

Coracobrachialis- Insertion

A

shaft/humerus

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67
Q

Coracobrachialis- Action

A

1) flexion and weak adduction of arm (shoulder joint)

2) stabilizes shoulder joint

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68
Q

Coracobrachialis- Nerve

A

Musculocutaneous Nerve

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69
Q

Brachialis- Origin

A

shaft/humerus

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70
Q

Brachialis- Insertion

A

coronoid process/ulna

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71
Q

Brachialis- Action

A

flexes forearm (equal prime mover)

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72
Q

Brachialis- Nerve

A

Musculocutaneous Nerve

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73
Q

Triceps Brachii- Origin

A

1) long head- infraglenoid tubercle/scapula
2) lateral head- shaft/humerus
3) medial head- shaft/humerus

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74
Q

Triceps Brachii- Insertion

A

olecranon process/ulna

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75
Q

Triceps Brachii- Action

A

extension of forearm

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76
Q

Triceps Brachii- Nerve

A

Radial Nerve

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77
Q

Pronator Teres- Origin

A

1) medial epicondyle/humerus

2) coronoid process/ulna

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78
Q

Pronator Teres- Insertion

A

pronator ridge/radius

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79
Q

Pronator Teres- Action

A

1) pronates forearm at superior radioulnar joint

2) assists flexion at elbow joint

80
Q

Pronator Teres- Nerve

A

Median Nerve

81
Q

Flexor Carpi Radialis- Origin

A

medial epicondyle/humerus

82
Q

Flexor Carpi Radialis- Insertion

A

2nd metacarpal with small slip to 3rd metacarpal

83
Q

Flexor Carpi Radialis- Action

A

1) equal prime mover for flexion of hand at wrist joint

2) assists in abduction of hand

84
Q

Flexor Carpi Radialis- Nerve

A

Median Nerve

85
Q

Palmaris Longus- Origin

A

medial epicondyle/humerus

86
Q

Palmaris Longus- Insertion

A

palmar aponeurosis

87
Q

Palmaris Longus- Action

A

1) helps hand flex

2) tightens fascia of palm/helps with palmar grip

88
Q

Palmaris Longus- Nerve

A

Median Nerve

89
Q

Flexor Carpi Ulnaris- Origin

A

1) medial epicondyle/humerus

2) olecranon process ulna

90
Q

Flexor Carpi Ulnaris- Insertion

A

1) pisiform
2) hamate
3) 5th metacarpal

91
Q

Flexor Carpi Ulnaris- Action

A

1) equal prime mover for flexion of hand (at wrist joint)

2) adducts hand

92
Q

Flexor Carpi Ulnaris- Nerve

A

Ulnar Nerve

93
Q

Flexor Digitorum Superficialis- Origin

A

medial epicondyle/humerus

94
Q

Flexor Digitorum Superficialis- Insertion

A

middle phalanges/digits 2-5

95
Q

Flexor Digitorum Superficialis- Action

A

1) flexes the PIP joints of digits 2-5

2) helps flex hand

96
Q

Flexor Digitorum Superficialis- Nerve

A

Median Nerve

97
Q

Flexor Digitorum Profundus- Origin

A

shaft/ulna

98
Q

Flexor Digitorum Profundus- Insertion

A

distal phalanges/digits 2-5

99
Q

Flexor Digitorum Profundus- Action

A

1) flexes the DIP joints of digits 2-5

2) helps flex hand

100
Q

Flexor Digitorum Profundus- Nerve

A

Ulnar Nerve

Median Nerve

101
Q

Flexor Pollicis Longus- Origin

A

shaft/radius

102
Q

Flexor Pollicis Longus- Insertion

A

distal phalanx/digit 1

103
Q

Flexor Pollicis Longus- Action

A

flexes the thumb (digit 1) at IP joint

104
Q

Flexor Pollicis Longus- Nerve

A

Median Nerve

105
Q

Pronator Quadratus- Origin

A

shaft/ulna

106
Q

Pronator Quadratus- Insertion

A

shaft/radius

107
Q

Pronator Quadratus- Action

A

1) pronation of forearm at the inferior radioulnar joint

2) helps stabilize the inferior radioulnar joint

108
Q

Pronator Quadratus- Nerve

A

Median Nerve

109
Q

Brachioradialis- Origin

A

lateral supracondylar ridge/humerus

110
Q

Brachioradialis- Insertion

A

styloid process/radius

111
Q

Brachioradialis- Action

A

1) helps flex forearm

2) pronates and supinates the forearm

112
Q

Brachioradialis- Nerve

A

Radial Nerve

113
Q

Extensor Carpi Radialis Longus- Origin

A

lateral epicondyle/humerus

114
Q

Extensor Carpi Radialis Longus- Insertion

A

2nd metacarpal

115
Q

Extensor Carpi Radialis Longus- Action

A

1) extend the hand

2) abduct the hand

116
Q

Extensor Carpi Radialis Longus- Nerve

A

Radial Nerve

117
Q

Extensor Carpi Radialis Brevis- Origin

A

lateral epicondyle/humerus

118
Q

Extensor Carpi Radialis Brevis- Insertion

A

3rd metacarpal

119
Q

Extensor Carpi Radialis Brevis- Action

A

1) extend the hand

2) abduct the hand

120
Q

Extensor Carpi Radialis Brevis- Nerve

A

Radial Nerve

121
Q

Extensor Digitorum Maximus- Origin

A

lateral epicondyle/humerus

122
Q

Extensor Digitorum Maximus- Insertion

A

middle phalanx/digits 2-5

123
Q

Extensor Digitorum Maximus- Action

A

1) extend digits 2-5
2) extend hand
3) abducts digits 2, 4, 5

124
Q

Extensor Digitorum Maximus- Nerve

A

Radial Nerve

125
Q

Extensor Digiti Minimi- Origin

A

lateral epicondyle/humerus

126
Q

Extensor Digiti Minimi- Insertion

A

proximal phalanx/digit 5

127
Q

Extensor Digiti Minimi- Action

A

extend digit 5 (little finger)

128
Q

Extensor Digiti Minimi- Nerve

A

Radial Nerve

129
Q

Extensor Carpi Ulnaris- Origin

A

lateral epicondyle/humerus

130
Q

Extensor Carpi Ulnaris- Insertion

A

5th metacarpal

131
Q

Extensor Carpi Ulnaris- Action

A

1) extend hand

2) help adduct hand

132
Q

Extensor Carpi Ulnaris- Nerve

A

Radial Nerve

133
Q

Supinator- Origin

A

1) lateral epicondyle/humerus

2) supinator crest/ulna

134
Q

Supinator- Insertion

A

shaft/radius

135
Q

Supinator- Action

A

supinates forearm

136
Q

Supinator- Nerve

A

Radial Nerve

137
Q

Abductor Pollicis Longus- Origin

A

shaft/ulna and radius

138
Q

Abductor Pollicis Longus- Insertion

A

1st metacarpal

139
Q

Abductor Pollicis Longus- Action

A

abducts digit 1 at CM joint

140
Q

Abductor Pollicis Longus- Nerve

A

Radial Nerve

141
Q

Extensor Pollicis Brevis- Origin

A

shalf/radius

142
Q

Extensor Pollicis Brevis- Insertion

A

proximal phalanx/digit 1

143
Q

Extensor Pollicis Brevis- Action

A

extends digit 1 at MP joint

144
Q

Extensor Pollicis Brevis- Nerve

A

Radial Nerve

145
Q

Extensor Pollicis Longus- Origin

A

shaft/ulna

146
Q

Extensor Pollicis Longus- Insertion

A

distal phalanx/digit 1

147
Q

Extensor Pollicis Longus- Action

A

extends digit 1 at IP joint

148
Q

Extensor Pollicis Longus- Nerve

A

Radial Nerve

149
Q

Extensor Indicis- Origin

A

shaft/ulna

150
Q

Extensor Indicis- Insertion

A

proximal phalanx/digit 2

151
Q

Extensor Indicis- Action

A

extends digit 2 at MP joint

152
Q

Extensor Indicis- Nerve

A

Radial Nerve

153
Q

Anconeus- Origin

A

lateral epicondyle/humerus

154
Q

Anconeus- Insertion

A

olecranon process/ulna

155
Q

Anconeus- Action

A

extend forearm

156
Q

Anconeus- Nerve

A

Radial Nerve

157
Q

Abductor Pollicis Brevis- Origin

A

1) trapezium

2) scaphoid

158
Q

Abductor Pollicis Brevis- Insertion

A

proximal phalanx/digit 1

159
Q

Abductor Pollicis Brevis- Action

A

abducts digit 1 at MP joint

160
Q

Abductor Pollicis Brevis- Nerve

A

Median Nerve

161
Q

Opponens Pollicis- Origin

A

trapezium

162
Q

Opponens Pollicis- Insertion

A

1st metacarpal

163
Q

Opponens Pollicis- Action

A

medially rotates 1st metacarpal

164
Q

Opponens Pollicis- Nerve

A

Median Nerve

165
Q

Flexor Pollicis Brevis- Origin

A

1) trapezium
2) trapezoid
3) capitate

166
Q

Flexor Pollicis Brevis- Insertion

A

proximal phalanx/digit 1

167
Q

Flexor Pollicis Brevis- Action

A

flexes digit 1 at MP joint

168
Q

Flexor Pollicis Brevis- Nerve

A

Ulnar Nerve

Median Nerve

169
Q

Adductor Pollicis- Origin

A

1) oblique head- trapezoid, capitate, 2nd and 3rd metacarpals
2) transverse head- 3rd metacarpal

170
Q

Adductor Pollicis- Insertion

A

proximal phalanx/digit 1

171
Q

Adductor Pollicis- Action

A

adducts digit 1

172
Q

Adductor Pollicis- Nerve

A

Ulnar Nerve

173
Q

Abductor Digiti Minimi- Origin

A

pisiform

174
Q

Abductor Digiti Minimi- Insertion

A

proximal phalanx/digit 5

175
Q

Abductor Digiti Minimi- Action

A

abducts digit 5

176
Q

Abductor Digiti Minimi- Nerve

A

Ulnar Nerve

177
Q

Flexor Digiti Minimi- Origin

A

hamate

178
Q

Flexor Digiti Minimi- Insertion

A

proximal phalanx/digit 5

179
Q

Flexor Digiti Minimi- Action

A

flexes digit 5 at MP joint

180
Q

Flexor Digiti Minimi- Nerve

A

Ulnar Nerve

181
Q

Opponens Digiti Minimi- Origin

A

hamate

182
Q

Opponens Digiti Minimi- Insertion

A

5th metacarpal

183
Q

Opponens Digiti Minimi- Action

A

laterally rotates 5th metacarpal

184
Q

Opponens Digiti Minimi- Nerve

A

Ulnar Nerve

185
Q

Lumbricales- Origin

A

tendons of the flexor digitorum profundus muscle

186
Q

Lumbricales- Insertion

A

tendons of the extensor digitorum muscle

187
Q

Lumbricales- Action

A

1) flexes MP joint

2) extends IP joint

188
Q

Lumbricales- Nerve

A

1st and 2nd lumbricales- Median Nerve

3rd and 4th lumbricales- Ulnar Nerve

189
Q

Dorsal Interossei- Origin

A

2nd, 3rd and 4th metacarpals

190
Q

Dorsal Interossei- Insertion

A

proximal phalanx of digits 2, 3, and 4

191
Q

Dorsal Interossei- Action

A

1) abduct digits 2-4
2) flex MP joints
3) extend IP joints

192
Q

Dorsal Interossei- Nerve

A

Ulnar Nerve

193
Q

Palmar Interossei- Origin

A

2nd, 3rd, 4th and 5th metacarpals

194
Q

Palmar Interossei- Insertion

A

proximal phalanx of digits 2, 4, and 5

195
Q

Palmar Interossei- Action

A

1) adduct digits 2, 4, and 5
2) flex MP joints
3) extend IP joints

196
Q

Palmar Interossei- Nerve

A

Ulnar Nerve

Skeletal Muscles-OAIN (1 decks)

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