Anatomy Muscles 1 Flashcards Preview

SBOD > Anatomy Muscles 1 > Flashcards

Flashcards in Anatomy Muscles 1 Deck (182):
1

Origin and Insertion of Trapezius

ORIGIN:
- External occipital protuberance of skull and C1-T12 Spinous Processes

INSERTION:
- inner margin of clavicle, acromion, and scapular spine

2

Innervation of Trapezius

Subtrapezial nerve plexus (CN XI and C3/C4 Ventral Rami)

3

Action of Trapezius

- elevation
- depression
- retraction
- superior rotation of scapula

4

Origin and insertion of Levator Scapulae

ORIGIN:
- C1-C4 TRANSVERSE processes

INSERTION
- Medial border of scapula above spine

5

Innervation of Levator Scapulae

Dorsal Scapular Nerve and C3/C4

6

Action of Levator Scapulae

- Elevation
- inferior rotation of scapula

7

Origin/insertion of Rhomboid Minor

ORIGIN
- Spinous processes of C7-T1

INSERTION
- Medial border of scapula at spine

8

Innervation of Rhomboid Minor

Dorsal Scapular Nerve

9

action of Rhomboid Minor

- retraction
- inferior rotation of scapula

10

Origin/Insertion of Rhomboid Major

ORIGIN
- Spinous processes of T2-T5

INSERTION
- Medial border of scapula below spine

11

Innervation of Rhomboid Major

Dorsal Scapular Nerve

12

Action of Rhomboid major

- Retraction
- inf. Rotation of scapula

13

Origin/Insertion of Latissimus Dorsi

ORIGIN
- Spinous processes of T6-L5, iliac crest, & thoracolumbar fascia

INSERTION
- Intertubercular groove on anterior aspect of humerus

14

Innervation of Latissimus Dorsi

Thoracodorsal nerve

15

Action of Latissimus Dorsi

- Extension
- ADduction
- medial rotation of arm

Swimmers

16

origin/insertion of Iliocostalis

- Iliac crest, sacrum, and lumbar vertebrae
- angles of the ribs

17

innervation of erector Spinae muscles

dorsal rami of spinal nerves

18

action of erector spinae

extension and side-to-side (lateral) movements of the vertebral column

19

origin/insertion of longissimus

ORIGIN
- Transverse processes

INSERTION
- transverse processes of the thoracic and cervical vertebrae (highest fibers reach occipital bone of skull)

20

Origin/insertion of spinalis

ORIGIN
- Spinous processes

INSERTION
- Span the spinous processes; Prominent in thoracic region

21

Origin/insertion of Subscapularis

- Subscapular fossa
- Lesser tubercle of Humerus

22

Innervation of Subscapularis

Upper AND Lower Subscapular nerve

23

Action of Subscapularis

medial rotation at the shoulder

24

origin/insertion of Supraspinatus

ORIGIN
- Supraspinous fossa

INSERTION
- Greater tubercle of Humerus (Superior Facet)

25

innervation of Supraspinatus

Suprascapular Nerve (C5-C6)

26

action of Supraspinatus

Abduction at the shoulder 0-15°

27

origin/insertion of Infraspinatus

ORIGIN
- Infraspinous Fossa

INSERTION
- Greater tubercle of Humerus (middle Facet)

28

innervation of Infraspinatus

Suprascapular Nerve (C5-C6)

29

action of Infraspinatus

lateral rotation at the shoulder

30

origin/insertion of Teres Minor

ORIGIN
- Upper lateral border of the scapula

INSERTION
- Greater tubercle of Humerus (inferior facet)

31

innervation of Teres Minor

axillary Nerve (C5-C6)

32

action of Teres Minor

Lateral rotation at the shoulder

33

Origin/insertion of Teres Major

ORIGIN
- Lower Lateral Border of the Scapula

INSERTION
- Crest of the lesser tubercle of the humerus

34

innervation of Teres Major

Lower subscapular nerve

35

action of Teres Major

- medial rotation
- adduction
- extension at shoulder

swimmers

36

origin/insertion of Deltoid

ORIGIN
- lateral margin of the scapular spine, acromion & clavicle

INSERTION
- deltoid tuberosity of humerus

37

innervation of Deltoid

axillary Nerve (C5-C6)

38

action of Deltoid

Abduction @ shoulder 15-100°

Ant. Fibers - Med. Rot. and Flex. At shoulder

Post Fibers - Lat. Rot. and Ext. At Shoulder

39

origin/insertion of Pectoralis Major

ORIGIN
- Clavicle, Sternum, and Ribs 1-6

INSERTION
- Crest of the Greater Tubercle of Humerus

40

innervation of Pectoralis Major

Medial and Lateral Pectoral Nerve

41

action of Pectoralis Major

- Medial rotation
- adduction
- flexion of arm

42

origin/insertion of Pectoralis Minor

ORIGIN
- Ribs 3-5

INSERTION
- Coracoid Process of Scapula

43

innervation of Pectoralis Minor

Medial Pectoral Nerve

44

action of Pectoralis Minor

protraction of the scapula

45

origin/insertion of Serratus Anterior

ORIGIN
- Ribs 1-9

INSERTION
- Medial Border of the Scapula, Costal surface

46

innervation of Serratus Anterior

Long Thoracic Nerve (C5-C7)

47

action of Serratus Anterior

- Protraction
- Sup. Rot. of the lateral angle of scapula

- holds scapula against the dorsal trunk

48

origin/insertion of Coracobrachialis

ORIGIN
- Coracoid process of scapula

INSERTION
- medial aspect of the humerus, midshaft

49

innervation of Coracobrachialis

Musculocutaneous N

50

action of Coracobrachialis

Flexion at shoulder joint

51

origin/insertion of Biceps Brachii-Long and short Heads

Long head:
- Supraglenoid tubercle
- Radial tuberosity

Short head:
- Coracoid Process of scapula
- Radial tuberosity

52

innervation of biceps brachii

Musculocutaneous N.

53

action of biceps brachii

- Flexion at elbow joint
- Flexion at should joint (weak)
- Supination

54

origin/insertion of Brachialis

ORIGIN
- Anterior Aspect of the Humerus, Lower 1/2

INSERTION
- Ulnar Tuberosity

55

innervation of Brachialis

Musculocutaneous N.

56

action of Brachialis

Flexion at the elbow joint

57

Origin of Triceps Brachii-Long Head

Infraglenoid tubercle

58

origin of Triceps Brachii- Lateral Head

posterior humerus, lateral and superior to radial groove

59

Origin of Triceps Brachii- Medial Head

posterior humerus medial and inferior to radial groove

60

Insertion of triceps brachii

olecranon of ulna

61

Innervation of triceps brachii

Radial N.

62

action of triceps brachii

- Extension at shoulder joint (long head only)
- Extension at elbow joint

63

Origin/Insertion of Brachioradialis

ORIGIN
- lateral epicondyle and supracondylar ridge of the humerus

INSERTION
- Styloid process of the radius

64

Innervation of Brachioradialis

Radial N.

65

Action of Brachioradialis

Flexion at elbow joint

66

Origin/Insertion of Extensor Carpi Radialis Longus

ORIGIN
- lateral epicondyle and supracondylar ridge of the humerus

INSERTION
- base of the 2nd metacarpal

67

Innervation of Extensor Carpi Radialis Longus

Radial N.

68

Action of Extensor Carpi Radialis Longus

- extension at the wrist joint
- abduction at wrist

69

Origin/insertion of Extensor Carpi Radialis Brevis

ORIGIN
- lateral epicondyle and supracondylar ridge of the humerus

INSERTION
- base of the 3rd metacarpal

70

innervation of Extensor Carpi Radialis Brevis

Deep radial N

71

action of Extensor Carpi Radialis Brevis

- extension at the wrist joint
- abduction at wrist

72

origin/insertion of Extensor Digitorum

ORIGIN
- lateral epicondyle and supracondylar ridge of the humerus

INSERTION
- middle and distal phalanges of digits 2-5 via extensor expansion

73

innervation of Extensor Digitorum

posterior interosseous N

74

action of Extensor Digitorum

Extension of MP Joint of digits 2-5

75

origin/insertion of Extenor Digiti Minimi

ORIGIN
- lateral epicondyle and supracondylar ridge of the humerus

INSERTION
- extensor expansion of digit 5

76

innervation of Extenor Digiti Minimi

posterior interosseous N

77

action of Extenor Digiti Minimi

Extension of MP joint of Digit 5

78

origin/insertion of Extensor Carpi Ulnaris

ORIGIN
- lateral epicondyle & supracondylar ridge of the humerus

INSERTION
- base of the 5th metacarpal

79

innervation of Extensor Carpi Ulnaris

posterior interosseous N

80

action of Extensor Carpi Ulnaris

- extension at the wrist joint
- abduction at wrist

81

origin/insertion of Supinator

ORIGIN
- Radius, Ulna, and/or interosseous membrane

INSERTION
- radius

82

innervation of Supinator

deep radial N.

83

action of Supinator

supination

84

origin/insertion of Abductor Pollicis Longus

ORIGIN
- Radius, Ulna, and/or interosseous membrane

INSERTION
- base 1st metacarpal

85

innervation of Abductor Pollicis Longus

posterior interosseous N

86

action of Abductor Pollicis Longus

abduction of thumb

87

origin/insertion of Extensor Pollicis Brevis

ORIGIN
- Radius, Ulna, and/or interosseous membrane

INSERTION
- base of proximal phalanx of thumb

88

innervation of Extensor Pollicis Brevis

posterior interosseous N

89

action of Extensor Pollicis Brevis

extension of thumb

90

origin/insertion of Extensor Pollicis Longus

ORIGIN
- Radius, Ulna, and/or interosseous membrane

INSERTION
- base of distal phalanx of thumb

91

innervation of Extensor Pollicis Longus

posterior interosseous N

92

action of Extensor Pollicis Longus

extension of thumb

93

origin/insertion of Extensor Indicis

ORIGIN
- Radius, Ulna, and/or interosseous membrane

INSERTION
- extensor expansion of digit 2

94

innervation of Extensor Indicis

posterior interosseous N

95

action of Extensor Indicis

extension of MP joint at digit 2

96

Origin/insertion of Pronator Teres

ORIGIN
- medial epicondyle and proximal ulna

INSERTION
- shaft of the radius

97

innervation of Pronator Teres

Median N.

98

action of Pronator Teres

pronation

99

origin/insertion of Flexor Carpi Radialis

ORIGIN
- Medial epicondyle & supracondylar ridge of humerus

INSERTION
- base of 2nd and 3rd metacarpals

100

innervation of Flexor Carpi Radialis

Median N.

101

action of Flexor Carpi Radialis

- Flexion at wrist
- abduction at the wrist

102

origin/insertion of Palmaris Longus

ORIGIN
- Medial epicondyle and supercondylar ridge of humerus

INSERTION
- palmar aponeurosis

103

innervation of Palmaris Longus

Median N.

104

action of Palmaris Longus

Flexion at the wrist (weak)

105

origin/insertion of Flexor Digitorum Superficialis

ORIGIN
- Medial epicondyle and supracondylar ridge of humerus

INSERTION
- Middle phalanx

106

innervation of Flexor Digitorum Superficialis

Median N.

107

action of Flexor Digitorum Superficialis

Flexion of digits 2-5 at MP and PIP Joints

108

origin/insertion of Flexor Carpi Ulnaris

ORIGIN
- Medial epicondyle and supracondylar ridge of humerus

INSERTION
- Base of 5th metacarpal

109

innervation of Flexor Carpi Ulnaris

Ulnar N.

110

action of Flexor Carpi Ulnaris

Flexion and Adduction at the wrist

111

origin/insertion of Flexor Digitorum Profundus

ORIGIN
- Radius, ulnar and/or interosseous membrane

INSERTION
- distal Phalanx of digits 2-5

112

Innervation of Flexor Digitorum Profundus: Lateral Two Bellies

anterior interosseous N.

113

Innervation of Flexor Digitorum Profundus: Medial Two Bellies

Ulnar N.

114

action of of Flexor Digitorum Profundus

Flexion of Digits 2-5 at the MP, PIP, and DIP joints

115

origin/insertion of Flexor Pollicis Longus

ORIGIN
- Radius, ulnar and/or interosseous membrane

INSERTION
- distal phalanx of digit 1

116

innervation of Flexor Pollicis Longus

anterior interosseous N.

117

action of Flexor Pollicis Longus

flexion of the thumb

118

origin/insertion of Pronator Quadratus

ORIGIN
- Distal Ulna

INSERTION
- distal radius

119

innervation of Pronator Quadratus

anterior interosseous N.

120

action of Pronator Quadratus

pronation

121

origin/insertion of Flexor Pollicis Brevis

ORIGIN
- Lateral carpal bones and flexor retinaculum

INSERTION
- base of the proximal phalanx of digit 1

122

innervation of Flexor Pollicis Brevis

recurrent motor branch of median N.

123

action of Flexor Pollicis Brevis

Flexion of thumb

124

origin/insertion of Abductor Pollicis Brevis

ORIGIN
- Lateral carpal bones and flexor retinaculum

INSERTION
- base of the proximal phalanx of digit 1

125

innervation of Abductor Pollicis Brevis

recurrent motor branch of median N.

126

action of Abductor Pollicis Brevis

abduction of thumb

127

origin/innervation of Opponens Pollicis

ORIGIN
- Lateral carpal bones and flexor retinaculum

INSERTION
- metacarpal 1

128

innervation of Opponens Pollicis

recurrent motor branch of median N.

129

action of Opponens Pollicis

opposition of thumb

130

origin/insertion of Flexor Digiti Minimi

ORIGIN
- Medial carpal bones and flexor retinaculum

INSERTION
- base of proximal phalanx of digit 5

131

innervation of Flexor Digiti Minimi

Ulnar N.

132

action of Flexor Digiti Minimi

Flexion of digit 5

133

origin/insertion of Abductor Digiti Minimi

ORIGIN
- Medial carpal bones and flexor retinaculum

INSERTION
- base of proximal phalanx of digit 5

134

innervation of Abductor Digiti Minimi

Ulnar N.

135

action of Abductor Digiti Minimi

abduction of digit 5

136

origin/insertion of Opponens Digiti Minimi

ORIGIN
- Medial carpal bones and flexor retinaculum

INSERTION
- Metacarpal 5

137

innervation of Opponens Digiti Minimi

Ulnar N.

138

action of Opponens Digiti Minimi

opposition of digit 5

139

origin/insertion of Lumbricals

ORIGIN
- tendons of flexor digitorum profundus

INSERTION
- Extensor expansion of digits 2-5

140

Innervation of Lumbricals

Ulnar N. = Lumbricals 3 and 4

Median N. = Lumbrincals 1 and 2

141

Action of Lumbricals

- Flexion of MP joint
- Extension of the IP joints via the extensor expansion

142

origin/insertion of Palmar Interossei

ORIGIN
- metacarpals

INSERTION
- Proximal phalanx and extensor expansion of digits 2, 4, 5

143

innervation of Palmar Interossei

Ulnar N.

144

action of Palmar Interossei

- ADduction of digits 2, 4, 5
- MP flexion and IP Extension

PAD = Palmer Inerossei ADduct

145

origin/insertion of Dorsal Interossei

ORIGIN
- metacarpals

INSERTION
- Proximal Phalanx and extensor Expansion of digits 2-4

146

innervation of Dorsal Interossei

Ulnar N.

147

action of Dorsal Interossei

ABduction of digits 2-4; MP Flexion and IP extension

DAB = Dorsal Interossei ABduct

148

origin of Adductor Pollicis: Transverse Head

3rd metacarpal

149

origin of Adductor Pollicis: Oblique Head

capitate

150

insertion of Adductor Pollicis

Base of proximal phalanx of digit 1

151

innervation of Adductor Pollicis

Ulnar N.

152

action of Adductor Pollicis

ADduction of thumb

153

Sympathetic system preganglionic cell body location

- intermediolateral cell column, spinal cord gray matter (T1-L2)

154

Parasympathetic system preganglionic cell body location

- ventral horn gray matter of spinal cord segments S2-S4
- brainstem of motor nuclei of cranial nerves III, VII, IX, & X

155

Sympathetic system postganglionic cell body location

- Chain motor ganglia
- collateral motor ganglia

156

Parasympathetic system postganglionic cell body location

terminal motor ganglia

157

Sympathetic system targets

Chain Ganglion:
- body wall
- head
- thorax

Collateral Ganglion:
- abdomen
- pelvis

158

Parasympathetic system targets

Terminal Ganglion
- head
- thorax
- upper/lower abdomen
pelvis

159

GSA

- General Somatic Afferent
- Sensory from somatic structures

160

GSE

- General Somatic Efferent
- motor to skeletal muscles

161

GVA

- General Visceral Afferent
- sensory from visceral structures such as smooth muscle, cardiac muscle, mucous, etc.

162

GVE

- general visceral efferent
- motor innervation to structures comprised of smooth/cardiac muscle & glands

163

which comes first" root or rami

root

motor fibers --> root --> spinal nerve --> rami

164

Dorsal root

- contains dorsal root ganglion
- pseudo unipolar sensory neuron cell bodies
- SENSORY (afferent) ONLY

165

Ventral Root

- MOTOR (efferent) ONLY
- multipolar cell bodies are located in ventral horn of spinal cord gray matter

166

Autonomic motor ganglion

- 3 types: chain, collateral, & terminal
- collection of motor neuron cell bodies
- where preganglionic & post ganglionic synapse

- chain & collateral = sympathetic
- terminal = parasympathetic

167

Describe gray & white rami communicans

- present in chain ganglion

GRAY
- medial
- off ramp
- found at all 31 spinal cord levels

WHITE
- lateral
- on ramp
- purely preganglionic sympathetic GVE motor fibers
- found only T1-L2

168

describe the path of preganglionic axons of sympathetic system

preganglionic axons leave spinal cord via ventral roots of T1-L2 --> spinal nerve --> white rami communicans --> sympathetic trunk -->
1. pass thru & exit without synapsing (splanchnic nerves; synapse later)
2. Synapse at level of entry
3. synapse above/bleow level of entry

2&3 synapse --> gray rami communicans --> body

169

collateral ganglia are only used by

those sympathetic GVE fibers that are destined to innervate visceral structures of the abdomen & pelvis

170

describe the preganglionic sympathetic fibers destined for the body wall

arise from all 14 cord segments form T1-L2 --> white rami communicans --> sympathetic chain --> synapse at entry/descend or ascend and synapse there --> gray rami --> leave sympathetic chain

171

Axilla boarders

ANTERIOR WALL:
- pec maj
- pec minor
- clavipectoral fascia

MEDIAL WALL:
- upper thoracic wall (ribs and related intercostal tissues)
- serrates anterior muscle

LATERAL WALL:
intertubercular groove of humerus

POSTERIOR WALL:
- subscapularis
- teres major
- latissimus dorsi

172

Triangular space boarders

teres minor
theres major
long head of triceps

173

quadrangular space borders

teres minor
theres major
long head of triceps
humerus

174

cubital fossa boarders

LATERAL:
- brachioradialis muscle

MEDIAL:
- pronator teres muscle

SUPERIOR:
- imaginary line b/w medial & lateral humeral epicondyles

ROOF:
- bicipital aponeurosis
- antebrachial fascia

FLOOR:
- brachnialis
- pronator teres
- supinator muscles

175

snuff box boarders

LATERAL:
- abductor pollicis longus tendon
- extensor pollicis brevis tendon

MEDIAL:
- extensor pollicis longus tendon

FLOOR:
- scaphoid bone

176

triangular interval boarders

humerus
teres major
long head triceps

177

Spinal cord nerves to know...

C5 = shoulder
T4 = nipple
T10 = navel
L1 = groin

178

what goes thru the quadrangular space

axillary nerve and posterior circumflex humeral artery

179

What goes thru the triangular space?

circumflex scapular artery and vein

180

what goes through the triangular interval

profunda brachii artery and radial nerve

181

Boarders of triangle of auscultation

Floor - rhomboid major

Latissimus dorsi
Trapezius
Rhomboid major?

182

triangle of auscultation boarders

Lateral = trapezius
Superior = latissimus dorsi
Medial = scapula