Muscles Flashcards
(180 cards)
1
Q
Pec Major INSERTION
A
Lateral lip of bicciptal groove
2
Q
Pec Major Innervation
A
lateral and medial pectoral nerves
3
Q
Pec Major Action
A
Adduction and medial rotation of humerus, Clavicular head = flexes humerus, Sternocostl head = extends humerus from flexed posiiton
4
Q
Pec Minor ORIGIN
A
ribs 3,4,5
5
Q
Pec Minor INSERTION
A
Coracoid process of scapula
6
Q
Pec Minor Innervation
A
Medial pectoral nerve
7
Q
Pec Minor Action
A
Stablises the scapula and acts as an accessroy muscle of respiration when pectoral girdle is fixed
8
Q
Serratus Ant. ORIGIN
A
External surfaces of ribs 1-8
9
Q
Serratus Ant. INSERTION
A
Ant. surface of medial scapular border
10
Q
Serratus Ant. Innervation
A
long thoracic n
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
12
Q
Trapezius ORIGIN
A
Superior nuchal line, nuchal ligament spinous processes of C7-T12 vertebrae
13
Q
Trapezius INSERTION
A
Lateral 1/3 of the clavicle, acromion and spine of the scapula
14
Q
Trapezius innervation
A
- Spinal root of accessory nerve (CNXI)-motor fibres
Cervical nerves C3 and C4
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)
16
Q
Latissimus Dorsi ORIGIN
A
Spinous processes of the T7-T12 vertebra, thoracolumbar fascia, iliac crest, lower 4 ribs
17
Q
Latissimus Dorsi INSERTION
A
Floor of the intertubercular groove/bicipital groove of the the humerus (mnemoic - lady btw 2 majors)
18
Q
Latissimus dorsi innervation
A
thoracocdorsal n
19
Q
Lat Dorsi Action
A
Extension, adduciton and medial rotation of humerus.
20
Q
Levator Scapulae Origin
A
Transverse processes of C1-4
21
Q
Levator Scapulae Insertion
A
Superior medial border of scapula
22
Q
Levator scapulae innervation
A
dorsal scapular n
23
Q
Rhomboids innervation
A
dorsal scapular n
24
Q
Levator scapulae action
A
elevates scapula
25
Rhomboids action
retracts scapula and rotate scpaula
26
Deltoid ORIGIN
Lateral 1/3 of clavicle, acromion and spine of scapula
27
Deltoid INSERTION
deltoid tuberosity of humerus
28
deltoid innervation
axillary
29
Anterior fibres of deltoid Action
flexes arm (assisted by pec major)
30
Middle fibres of deltoid action
abdution of the arm after 15 degrees
31
posterior fibres of detloid action
extend arm
32
Teres major origin
inferior border of scapular
33
teres major insertion
intertubercular groove
34
teres major innervation
lower scapular nerve
35
teres major action
adduction and medial rotation of arm at shoulder j
36
supraspinatus origin
supraspinous fossa
37
supraspinatus insertion
greater tubercle of humerus
38
supraspinatus innervation
suprascapular n
39
infraspinatus origin
infraspinous fossa
40
infraspinatus insertion
greater tubercle of humerus
41
infraspinatus innervation
suprascapular n
42
supraspinatus action
abducts the arm first 15 degrees
43
infraspinatus action
lateral rotator of arm at shoulder j
44
teres minor origin
superior part of lateral scapular border
45
teres minor insertion
greater tubercle of humerus
46
teres minor innervation
axillary n
47
teres minor action
lateral rotator of arm at shoulder j
48
subscapularis origin
subscapular fossa
49
subscapularis insertion
lesser tubercle of humerus
50
subscapularis innervation
upper and lower subscapular n
51
subscapularis action
medial rotation
52
biceps brachii origin (long and short head)
long head = supraglenoid tubercle of scapula, short head = coracoid process of scapula
53
biceps brachiii insertion
radial tuberosity
54
biceps brachii innervation
musculocutaneous n
55
biceps brachii action
flexor at elbow, supinator of the forearm
56
coracobrachialis origin
coracoid process
57
coracobrachilais inerstion
midshaft of humerus
58
coracobrachililis innervation
musculocutaneous n
59
coracobrachialis action
weak flexor and adductor of the arm
60
brachialis origin
midshaft of humerus
61
brachialis insertion
ulnar tuberosity
62
brachialis innervation
musculocutaneous
63
brachialis action
chief flexor of the forearm
64
what is the chief flexor of the forearm
brachialis
65
triceps brachii origin (long, medial and lateral heads)
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
66
triceps brachii insertion
olecranon process
67
triceps innervation
radial n
68
triceps action
- Chief extensor of the forearm
Long head stabilises the head of humerus in arm when abducted
69
pronator teres origin
medial epicondyle of humerus
70
pronator teres insertion
midshaft of radius
71
pronator teres innervation
median
72
pronator teres action
pronator
73
flexor carpi radialis origin
medial epicondyle of humerus
74
FCR insertion
The base of the 2nd metacarpal bone
75
FCR innervation
median
76
FCR action
Flexes and abducts the hand at the wrist
Also helps with flexion at the elbow
77
palmaris longus innervation
median
78
palmaris longus action
Flexes hand at wrist and tightness palmar aponeurosis
Very weak
79
FCU origin
medial epicondyle of humerus
80
FCU insertion
Pisiform, hook of hamate and 5th metacarpal bone
81
FCU innervation
ulnar n
82
FCU action
Flexes and adducts hand at the wrist joint
83
Flexor digitorum superficialis origin
Medial epicondyle of humerus, coronoid process of ulna and anterior border of radius
84
Flexor digitorum superficialis insertion
`middle phalanx of the medial 4 digits
85
Flexor digitorum superficialis innervation
median
86
Flexor digitorum superficialis action
flexion of the middle phalanges at proximal interphalangeal joints, flexion of proximal phalanges at metacarpophalangeal joints
87
flexor pollicis longus origin
Anterior surface of the radius and interosseous membrane
88
flexor pollicis longus insertion
base of distal phalanx of thumb
89
flexor pollicis longus innervation
median
90
flexor pollicis longus movement
flexes phalanges of thumb
91
flexor digitorum profundus origin
Proximal anterior surface of the ulna
92
flexor digitorum profundus insertion
Base of distal phalanges of medial four digits
93
flexor digitorum profundus innervation
Median + medial 1/2 of FDP innervated by the ulnar n
94
flexor digitorum profundus movement
Flexes distal phalanges at distal interphalangeal joints, metacarpophalangeal joints, and assist in flexion of hand
95
pronator quadratus origin
Anterior aspect of distal one quarter of ulna
96
pronator quadratus insertion
distal anterior surfaces of radial and ulna
97
pronator quadratus innervation
median
98
brachioradialis origin
supracondylar ridge of humerus
99
brachioradialis insertion
lateral surface of distal radius
100
brachioradialis innervation
radial
101
brachioradialis action
Flexor of the forearm at the elbow
102
Extensor carpi radialis longus and brevis
origin
lateral epicondyle
103
Extensor carpi radialis longus and brevis
insertion
2nd and 3rd base of metacarpal
104
Extensor carpi radialis longus and brevis
innervation
Deep branch of radial n
105
Extensor carpi radialis longus and brevis
action
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
ECU origin
lateral epicondyle
107
ECU insertion
base of 5th metacarpal
108
ECU innervation
Deep branch of radial n
109
ECU movement
Extensor - when acting together with flexor carpi ulnaris the muscles produce adduction at the wrist joint
110
extensor digitorum origin
lateral epicondyle
111
extensor digitorum insertion
extensor expansion of medial 4 digits
112
Extensor digitorum nerve
Deep branch of radial n
113
Extensor digitorum movement
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
Extensor digiti minimi origin
lateral humeral epicondyle
115
Extensor digiti minimi insertion
Extensor expansion of the 5th digit. It extends 5th digit primarily at metacarpophalangeal joint secondarily at IPJ
116
Extensor digiti minimi innervation
Deep branch of radial n
117
Extensor digiti minimi action
extensor
118
supinator origin
lateral epicondyle of humerus
119
supinator insertion
proximal radius
120
supinator innervation
deep branch of radial n
121
supinator action
supination
122
abductor pollicis longus origin
Posterior surface of proximal half of radius, ulna and interosseus membrane
123
abductor pollicis longus insertion
Base of metacarpal bone 1, (trapezium bone)
124
abductor pollicis longus innervation
Posterior interosseus nerve (continuation of the deep branch of radial n)
125
abductor pollicis longus action
Abducts and extends thumb at carpometacarpal joint
126
Extensor pollicis brevis origin
Posterior surface of distal third of radius and interosseus membrane
127
Extensor pollicis brevis insertion
Posterior aspect of base of proximal phalanx of thumb
128
Extensor pollicis brevis innervation
Posterior interosseus nerve (continuation of the deep branch of radial n)
129
Extensor pollicis brevis action
Extends proximal phalanx of thumb at carpometacarpal joint
130
Extensor pollicis longus origin
Posterior surface of middle third of ulna and interosseus membrane
131
Extensor pollicis longus insertion
Posterior aspect of base of distal phalanx of thumb
132
Extensor pollicis longus innervation
Posterior interosseus nerve (continuation of the deep branch of radial n)
133
Extensor pollicis longus action
Extends distal phalanx of thumb at both metacarpophalangeal and interphalangeal joint
134
extensor indicis origin
Posterior surface of distal third of ulna and interosseus membrane
135
extensor indicis insertion
Extensor expansion of index finger
136
extensor indicis nerve
Posterior interosseus nerve (continuation of the deep branch of radial n)
137
extensor indicis action
Wrist joints: Weak hand extension
Metacarpophalangeal and interphalangeal joints of index finger: Finger extension
138
palmaris brevis origin
palmar aponeurosis, flexor retinaculum
139
palmaris brevis insertion
Dermis of skin of hypothenar region
140
palmaris brevis innervation
ulnar n
141
palmaris brevis action
improves grip
142
abductor pollicis brevis origin
trapezium, flexor retinaculum
143
abductor pollicis brevis insertion
Proximal phalanx, extensor hood of the thumb
144
abductor pollicis breivs innervation
median n
145
abductor pollicis brevis action
abducts thumb at metacarpophalangeal j
146
flexor pollicis brevis origin
Trapezium, flexor retinaculum
147
flexor pollicis brevis insertion
prox phalanx of the thumb
148
flexor pollicis brevis innervation
medina
149
flexor policis brevis action
flexes thumb at metacarpophalangeal j
150
opponens pollicis origin
Trapezium, flexor retinaculum
151
opponens pollicis insertion
1st metacapral
152
opponens pollicis innervation
median
153
opponens pollicis action
Draws 1st metacarpal bone medially to oppose thumb and rotates it medially
154
Abductor digiti minimi (hypothenar muscle) origin
Pisiform tendon of flexor carpi ulnaris
155
Abductor digiti minimi (hypothenar muscle)
insertion
Proximal phalan, extensor hood of little finger
156
Abductor digiti minimi (hypothenar muscle)
innervation
ulnar
157
Abductor digiti minimi (hypothenar muscle)
action
Abducts little f. at metacarpophalangeal j
158
Flexor digiti minimi brevis (hypothenar muscle)
origin
Hamate, flexor retinaculum
159
Flexor digiti minimi brevis (hypothenar muscle)
insertion
Proximal phalanx of little f.
160
Flexor digiti minimi brevis (hypothenar muscle)
innervation
ulnar
161
Flexor digiti minimi brevis (hypothenar muscle)
action
Flexes little f. at metacarpophalangeal j
162
Opponens digiti minimi (hypothenar muscle)
origin
Hamate, flexor retinaculum
163
Opponens digiti minimi (hypothenar muscle)
innervation
ulnar
164
Opponens digiti minimi (hypothenar muscle)
action
lateral rotation of the little finger
165
adductor pollicis origin
Transverse head: metacarpal 3
Oblique head: capitate, metacarpals 2 and 3
166
adductor policis insertion
Proximal phalanx, extensor hood of the thumb
167
adducotr pollicis innervation
ulnar
168
adductor pollicis action
adduts thumb
169
lumbricals (1-4) origin
Tendons of flexor digitorum profundus
170
lumbricals (1-4) insertion
Extensor hoods of medial 4 fingers
171
lumbircals 1-4 innervation
Medial two - ulnar n
Lateral two - median n
172
lumbricals 1-4 action
Flex MCP joint while extending interphalangeal jl
173
dorsal interossei origin
adjacent shafts of metacarpals
174
Dorsal interossei insertion
Extesnor hood and base of proximal phalanges of index, middle and ring fingers
175
Dorsal interossei innervation
ulnar
176
Dorsal interossei action
Abduct infex, middle and ring fingers
DAB
D- dorsal
AB - abduction
177
Palmar interossei
origin
Shafts of metacarpals
178
palmar interossei insertion
Extensor hoods of thumb, index, ring an little fingers, proximal phalanx of thumb
179
palmar interossei innervation
ulnar n
180
palmar interossei action
Adduct thumb, index, ring, little fingers
