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Gross Anatomy > Muscles > Flashcards

Muscles Flashcards

1
Q

Pectoralis Major

Origin

A
  1. Clavicle
  2. Sternum & upper ribs
  3. Tendon of the External Oblique Muscle
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2
Q

Pectoralis Major

Insertion

A

Greater tubercle

Inter-tubercular groove/ humerus

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3
Q

Pectoralis Major

Action

A

Entire muscle: adduction & medial rotation of humerus, forced inspiration by elevating rib cage when humerus is fixed
Clavicular portion: flexes humerus @ shoulder joint
Sternocostal Portion: extends humerus @ should joint

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4
Q

Pectoralis Major

Nerve Supply

A

Medial Pectoral Nerve

Lateral Pectoral Nerve

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5
Q

Pectoralis Minor

Origin

A

Ribs 3-5

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6
Q

Pectoralis Minor

Insertion

A

Coracoid process/ scapula

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7
Q

Pectoralis Minor

Action

A

Involved w/ protraction/abduction of scapula

Elevates rib cage- involved w/ forced inspiration

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8
Q

Pectoralis Minor

Nerve Supply

A

Medial Pectoral Nerve

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9
Q

Subclavius

Origin

A

First Rib

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10
Q

Subclavius

Insertion

A

Subclavian groove/ clavicle

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11
Q

Subclavius

Action

A

Moves clavicle medically

Acts as protective cushion between clavicle and subclavian vessels

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12
Q

Subclavius

Nerve Supply

A

Nerve to 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 C7-T12
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14
Q

Trapezius

Insertion

A
  1. Clavicle

2. Acromion process of spine/ scapula

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15
Q

Trapezius

Action

A
  1. Stabilizes scapula
  2. Upper portion elevates scapula
  3. Middle @ lower portions adducts scapula; depresses scapula
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16
Q

Trapezius

Nerve Supply

A

Motor: spinal accessory nerve (XI Cranial)
Sensory: C3, C4

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17
Q

Rhomboid Major

Origin

A

Spines/ 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 & adducts scapula

2. Helps stabilize scapula

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20
Q

Rhomboid Major

Nerve Supply

A

Dorsal Scapular Nerve

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21
Q

Rhomboid Minor

Origin

A

Spines/ C7 & 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 & adducts scapula

2. Helps stabilize scapula

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24
Q

Rhomboid Minor

Nerve Supply

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

Upper medial border and superior angle/ scapula

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27
Q

Levator Scapula

Action

A
  1. Elevate scapula
  2. Adducts scapula
  3. Stabilize scapula
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28
Q

Levator Scapula

Nerve Supply

A

Dorsal Scapular Nerve

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29
Q

Latissimus Dorsi

Origin

A
  1. Spines/ lower thoracic and lumber vertebrae
  2. Thoracodorsal fascia
  3. Crest of ilium
  4. Lower ribs
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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. Extends, adducts, medially rotate humerus

2. Involved in forced expiration

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32
Q

Latissimus Dorsi

Nerve Supply

A

Thoracodorsal Nerve

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33
Q

Serratus Anterior

Origin

A

Upper 8 or 9 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 scapula
  3. Involved w/ forced inspiration (only when humerus abducted)
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36
Q

Serratus Anterior

Nerve Supply

A

Long thoracic

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37
Q

Deltoid

Origin

A
  1. Anterior/clavicular portion from clavicle
  2. Middle/acromial portion from acromion process of scapula
  3. Posterior/ spinous portion
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38
Q

Deltoid

Insertion

A

Deltoid tuberosity/ humerus

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39
Q

Deltoid

Action

A
  1. Anterior portion: flexes, medially rotates arm
  2. Middle portion: abducts arm
  3. Posterior portion: extends, laterally rotates arm
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40
Q

Deltoid

Innervation

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 Supply

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 Supply

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 rotate humerus

2. Stabilize shoulder joint

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52
Q

Subscapularis

Nerve Supply

A

Upper and 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

Innervation

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

Innervation

A

Axillary Nerve

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61
Q

Biceps Brachii

Origin

A

Short head: coracoids process scapula

Long head: Supraglenoid tubercle/ scapula

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62
Q

Biceps Brachii

Insertion

A
  1. Tuberosity/ radius

2. Shaft/ ulna

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63
Q

Biceps Brachii

Action

A

Flexion of forearm

Supinates radius

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64
Q

Biceps Brachii

Innervation

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, weak adduction of arm

2. Stabilizes shoulder joint

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68
Q

Coracobrachialis

Innervation

A

Musculocutaneous Nerve

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69
Q

Brachialis

Origin

A

Shaft/ humerus

Long head: infraglenoid tubercle/ scapula

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70
Q

Brachialis

Insertion

A

Ulnar tuberosity

Coronoid process/ ulna

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71
Q

Brachialis

Action

A

Flexes forearm

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72
Q

Brachialis

Innervation

A

Musculocutaneous Nerve

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73
Q

Triceps Brachii

Origin

A

Long head: infraglenoid tubercle/scapula

Medial and lateral 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

Innervation

A

Radial Nerve

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77
Q

Pronator Teres

Origin

A
  1. Medial epicondyle/ humerus

2. Coronoid process/ ulna

78
Q

Pronator Teres

Insertion

A

Pronator ridge/ radius

79
Q

Pronator Teres

Action

A
  1. Pronates forearm at superior radioulnar joint

2. Assists flexion at elbow joint

80
Q

Pronator Teres

Innervation

A

Median Nerve

81
Q

Flexor Carpi Radialis

Origin

A

Medial epicondyle/ humerus

82
Q

Flexor Carpi Radialis

Insertion

A

2nd metacarpal w/ small slip to 3rd metacarpal

83
Q

Flexor Carpi Radialis

Innervation

A

Median Nerve

84
Q

Palmaris Longs

Origin

A

Medial epicondyle/ humerus

85
Q

Palmaris Longus

Insertion

A

Palmer aponeurosis

86
Q

Palmaris Longus

Action

A
  1. Helps flex hand

2. Tightens palmer aponeurosis of palm/helps with palmar grip

87
Q

Palmaris Longus

Innervation

A

Median nerve

88
Q

Flexor Carpi Ulnaris

Origin

A
  1. Medial epicondyle/ humerus

2. Olecranon process ulna

89
Q

Flexor Carpi Ulnaris

Insertion

A

Pisiform, hamate, & 5th metacarpal

90
Q

Flexor Carpi Ulnaris

Action

A
  1. Equal prime mover for flexion of hand @ wrist joint

2. Adducts hand

91
Q

Flexor Carpi Ulnaris

Nerve

A

Ulnar Nerve

92
Q

Flexor Digitorum Superficialis

Origin

A

Shaft/radius

Medial epicondyle/ humerus

93
Q

Flexor Digitorum Superficialis

Insertion

A

Middle phalanges/ digits 2-5

94
Q

Flexor Digitorum Superficialis

Action

A
  1. Flexes the PI joints of digits 2-5

2. Helps flex hand

95
Q

Flexor Digitorum Superficialis

Innervation

A

Median Nerve

96
Q

Flexor Digitorum Profundus

Origin

A

Interosseous membrane shaft/ ulna

97
Q

Flexor Digitorum Profundus

Insertion

A

Distal phalanges/ digits 2-5

98
Q

Flexor Digitorum Profundus

Action

A
  1. Flexes the DIP joints of digits 2-5

2. Helps flex hand

99
Q

Flexor Digitorum Profundus

Innervation

A

Ulnar Nerve & Median Nerve

100
Q

Flexor Pollicis Longus

Origin

A

Interosseous membrane shaft/ radius

101
Q

Flexor Pollicis Longus

Insertion

A

Distal phalanx/ digit 1

102
Q

Flexor Pollicis Longus

Action

A

Flexes thumb (digit 1) @ IP joint

103
Q

Flexor Pollicis Longus

Innervation

A

Median Nerve

104
Q

Pronator Quadratus

Origin

A

Distal anterior shaft/ ulna

105
Q

Pronator Quadratus

Insertion

A

Distal anterior shaft/ radius

106
Q

Pronator Quadratus

Action

A
  1. Pronation of forearm @ the inferior radial-ulnar joint

2. Helps stabilize inferior-radial-ulnar joint

107
Q

Pronator Quadratus

Innervation

A

Median Nerve

108
Q

Brachioradialis

Origin

A

Lateral supracondylar ridge/humerus

109
Q

Brachioradialis

Insertion

A

Styloid process/ radius

110
Q

Brachioradialis

Action

A
  1. Helps flex forearm

2. Pronates, supinates forearm

111
Q

Brachioradialis

Innervation

A

Radial Nerve

112
Q

Extensor Carpi Radialis Longus

Origin

A

Lateral epicondyle/ humerus

113
Q

Extensor Carpi Radialis Longus

Insertion

A

2nd metacarpal

114
Q

Extensor Carpi Radialis Longus

Action

A
  1. Extend hand

2. Abduct hand

115
Q

Extensor Carpi Radialis Longus

Innervation

A

Radial Nerve

116
Q

Extensor Carpi Radialis Brevis

Origin

A

Lateral epicondyle/ humerus

117
Q

Extensor Carpi Radialis Brevis

Insertion

A

3rd Metacarpal

118
Q

Extensor Carpi Radialis Brevis

Action

A
  1. Extend hand

2. Abduct hand

119
Q

Extensor Carpi Radialis Brevis

Innervation

A

Radial Nerve

120
Q 
Extensor Digitorum (Maximus)
Origin
A

Lateral epicondyle/ humerus

121
Q 
Extensor Digitorum (Maximus)
Insertion
A

Middle phalanx/digits 2-5

122
Q 
Extensor Digitorum (Maximus)
Action
A
  1. Extends digits 2-5

2. Extend hand

123
Q 
Extensor Digitorum (Maximus)
Innervation
A

Radial Nerve

124
Q

Extensor Digiti Minimi

Origin

A

Lateral epicondyle/ humerus

125
Q

Extensor Digiti Minimi

Insertion

A

Proximal phalanx/ digit 5

126
Q

Extensor Digiti Minimi

Action

A

Extend digit 5

127
Q

Extensor Digiti Minimi

Innervation

A

Radial Nerve

128
Q

Extensor Carpi Ulnaris

Origin

A

Shaft/ulna

Lateral epicondyle/ humerus

129
Q

Extensor Carpi Ulnaris

Insertion

A

5th metacarpal

130
Q

Extensor Carpi Ulnaris

Action

A
  1. Extend hand

2. Helps adduct hand

131
Q

Extensor Carpi Ulnaris

Innervation

A

Radial Nerve

132
Q

Supinator

Origin

A
  1. Lateral epicondyle/ humerus

2. Supinator crest/ulna

133
Q

Supinator

Insertion

A

Shaft/radius

134
Q

Supinator

Action

A

Supinates forearm

135
Q

Supinator

Innervation

A

Radial Nerve

136
Q

Abductor Pollicis Longus

Origin

A

Interosseous membrane

Shaft/ulna and radius

137
Q

Abductor Pollicis Longus

Insertion

A

1st metacarpal

138
Q

Abductor Pollicis Longus

Action

A

Abducts digit 1 @ CM joint

Extends digit 1

139
Q

Abductor Pollicis Longus

Innervation

A

Radial Nerve

140
Q

Extensor Pollicis Brevis

Origin

A

Interosseous membrane

Shaft/radius

141
Q

Extensor Pollicis Brevis

Insertion

A

Proximal phalanx/digit 1

142
Q

Extensor Pollicis Brevis

Action

A

Extends digit 1 @ MP joint

143
Q

Extensor Pollicis Brevis

Innervation

A

Radial Nerve

144
Q

Extensor Pollicis Longus

Origin

A

Interosseous membrane

Shaft/ulna

145
Q

Extensor Pollicis Longus

Insertion

A

Distal phalanx/digit 1

146
Q

Extensor Pollicis Longus

Action

A

Extends digit 1 @ IP joint

147
Q

Extensor Pollicis Longus

Innervation

A

Radial Nerve

148
Q

Extensor Indicis

Origin

A

Interosseous membrane

Shaft/ulna

149
Q

Extensor Indicis

Insertion

A

Proximal phalanx/digit 2

150
Q

Extensor Indicis

Action

A

Extends digit 2

151
Q

Extensor Indicis

Innervation

A

Radial Nerve

152
Q

Anconeus

Origin

A

Lateral epicondyle/ humerus

153
Q

Anconeus

Insertion

A

Olecranon process

Posterior proximal shaft/ ulna

154
Q

Anconeus

Action

A

Extends forearm

155
Q

Anconeus

Innervation

A

Radial Nerve

156
Q

Abductor Pollicis Brevis

Origin

A

Trapezium

Scaphoid

157
Q

Abductor Pollicis Brevis

Insertion

A

Proximal phalanx/digit 1

158
Q

Abductor Pollicis Brevis

Action

A

Abducts digit 1 @ MP joint

159
Q

Abductor Pollicis Brevis

Innervation

A

Median Nerve

160
Q

Opponens Pollicis

Origin

A

Trapezium

161
Q

Opponens Pollicis

Insertion

A

1st metacarpal

162
Q

Opponens Pollicis

Action

A

Medially rotates 1st metacarpal

163
Q

Opponens Pollicis

Innervation

A

Median Nerve

164
Q

Flexor Pollicis Brevis

Origin

A

Trapezium
Trapezoid
Capitate bones

165
Q

Flexor Pollicis Brevis

Insertion

A

Proximal phalanx/ digit 1

166
Q

Flexor Pollicis Brevis

Action

A

Flexes digit 1 @ MP joint

167
Q

Flexor Pollicis Brevis

Innervation

A

Ulnar Nerve

Median Nerve

168
Q

Adductor Pollicis

Origin

A
  1. Trapezoid, capitate, 2nd & 3rd metacarpals

2. 3rd metacarpal

169
Q

Adductor Pollicis

Insertion

A

Proximal phalanx/digit 1

170
Q

Adductor Pollicis

Action

A

Adducts digit 1

171
Q

Adductor Pollicis

Innervation

A

Ulnar Nerve

172
Q

Abductor Digiti Quinti/ Minimi

Origin

A

Pisiform

173
Q

Abductor Digiti Quinti/ Minimi

Insertion

A

Proximal phalanx/digit 5

174
Q

Abductor Digiti Quinti/ Minimi

Action

A

Abducts digit 5

175
Q

Abductor Digiti Quinti/ Minimi

Innervation

A

Ulnar Nerve

176
Q

Flexor Digiti Quinti/ Minimi

Origin

A

Hamate

177
Q

Flexor Digiti Quinti/ Minimi

Insertion

A

Proximal phalanx/digit 5

178
Q

Flexor Digiti Quinti/ Minimi

Action

A

Flexes digit 5 @ MP joint

179
Q

Flexor Digiti Quinti/ Minimi

Innervation

A

Ulnar Nerve

180
Q

Opponens Digiti Quinti/ Minimi

Origin

A

Hamate

181
Q

Opponens Digiti Quinti/ Minimi

Insertion

A

5th metacarpal

182
Q

Opponens Digiti Quinti/ Minimi

Action

A

Laterally rotates 5th metacarpal

183
Q

Opponens Digiti Quinti/ Minimi

Innervation

A

Ulnar Nerve

184
Q

Lumbricales

Origin

A

Tendons of flexor digitorum Profundus muscle

185
Q

Lumbricales

Insertion

A

Tendons of extensor digitorum muscle

186
Q

Lumbricales

Action

A
  1. Flexes MP joints

2. Extends IP joint

187
Q

Lumbricales

Innervation

A

1st & 2nd lumbricales-Median Nerve

3rd & 4th lumbricales-Ulnar Nerve

188
Q

Dorsal interossei

Origin

A

2nd, 3rd, 4th metacarpals

189
Q

Dorsal interossei

Insertion

A

Proximal phalanx of digits 2,3,4

190
Q

Dorsal interossei

Action

A

Abducts digits 2-4
Flex MP joints
Extend IP joints

191
Q

Dorsal interossei

Innervation

A

Ulnar Nerve

192
Q

Flexor Carpi Radialis

Action

A
  1. Equal prime mover for flexion of hand @ wrist joint

2. Assists in abduction of hand

Gross Anatomy (18 decks)

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