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Muscles Flashcards

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1
Q

Sartorius

A

O: ASIS
I: Pes anserine tendon (proximal anterior medial surface of tibia)
K: 1. Flexion of thigh @ acetabulofemoral joint.
2. Abduction of thigh @ acetabulofemoral joint.
3. Lateral rotation of thigh @ acetabulofemoral joint.
4. Flexion of leg @ knee joint.
5. Medial rotation of leg @ knee joint.

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2
Q

Adductor Magnus

A

O: Inferior ishiopubic ramus of ischium and pubis
Ischial tuberosity of ischium
I: Gluteal tuberosity of femur.
– Linea aspera of femur.
– Adductor tubercle of femur.
– Medial supracondylar line of femur.
K: 1. Adduction of thigh @ acetabulofemoral joint.
2. Extension of thigh @ acetabulofemoral joint.

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3
Q

Middle traps

A

O: Spinous processes of T1-T5
I: Acromion process of the scapula
– Spine of the scapula
K: Retracts scapula @ scapulocostal joint

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4
Q

Opponens pollicis

A

O: Tubercle of trapezium
Flexor retinaculum
I: Lateral side of 1st metacarpal
K: Opposition of thumb @ carpometacarpal joint

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5
Q

Supinator

A

O: Lateral epicondyle of the humerus
Supinator crest of the ulna
I: Proximal 1/3 of posterior, lateral & anterior surface of the radius
K: Supinates forearm @ radioulnar joints

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6
Q

EDL

A

O: Proximal 2/3 of fibula.
–Proximal 1/3 of interosseous membrane.
–Lateral condyle of tibia.
I: Bases of middle & distal phalanges of toes 2 – 5 (via dorsal digital expansion)
K: Extension of toes 2 – 5 @ metatarsophalangeal & interphalangeal joints.
Dorsiflexion of foot @ ankle joint.

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7
Q

SCM

A

O: Medial 1/3 of the clavicle (Clavicular head)
Manubrium of the sternum (Sternal head)
I: Mastoid process of temporal bone.
–Lateral 1⁄2 of superior nuchal line.
K: Extends head @ atlanto-occipital joint.
–Flexes neck @ spinal joints.
–Lateral flexion of head & neck @ spinal joints.
–Contralateral rotation of head & neck @ spinal joints.

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8
Q

Adductor longus

A

O: Anterior body of pubis
I: Middle 1/3 of medial lip of linea aspera of femur
K: Flexion of thigh @ acetabulofemoral joint.
Adduction of thigh @ acetabulofemoral joint.

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9
Q

Fibularis longus

A

O: Head of fibula
Proximal 1/2 of lateral fibula
I: Base of the dorsal aspect of the 1st metatarsal.
–1st cuneiform.
K: Plantarflexion of foot @ ankle joint.
Eversion of foot @ subtalar joint.

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10
Q

Infraspinatus

A

O: Infraspinous fossa of the scapula
I: Middle facet of the greater tubercle of the humerus
K: Externally rotates arm @ glenohumeral joint.

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11
Q

Iliocostalis Lumborum

A

O: Iliac crest of ilium
Sacral crest of sacrum
I: Rib angles 7-12
K: Extension of trunk @ spinal joints.
Lateral flexion of trunk @ spinal joints.
Ipsilateral rotation of trunk @ spinal joints.

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12
Q

Tib ant

A

O: Lateral condyle of tibia.
–Proximal 2/3 of anterior tibia.
–Interosseous membrane.
I: 1st cuneiform.
–Base of 1st metatarsal.
K: Dorsiflexion of foot @ ankle joint.
Inversion of foot @ subtalar joint.

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13
Q

FCU

A

O: Medial epicondyle of the humerus via common flexor tendon.
–Medial olecranon of the ulna.
–Proximal 2/3 posterior shaft of the ulna.
I: Pisiform.
–Hook of hamate.
–Base of 5th metacarpal.
K: Flexes hand @ wrist joint.
–Ulnar deviates hand @ wrist joint.

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14
Q

Triceps

A

O: Infraglenoid tubercle of the scapula (long head).
–Proximal 1/3 posterior shaft of the humerus (lateral head).
–Distal 2/3 posterior shaft of the humerus (medial head).
I: Olecranon process of the ulna
K: Extends forearm @ elbow joint.
Extends arm @ glenohumeral joint.

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15
Q

Tib post

A

O: Proximal posterior tibia.
–Fibula.
–Interosseous membrane.
I: Base of metatarsals 2 – 4.
–Navicular tuberosity.
–All 3 cuneiforms.
–Cuboid.
–Calcaneus.
K: Plantarflexion of foot @ ankle joint.
Inversion of foot @ subtalar joint.

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16
Q

Rectus abdominis

A

O: Xiphoid process of sternum
Cartilages of ribs 5-7
I: Pubic crest of pubis.
–Pubic symphysis of pubis.
K: Flexion of trunk @ spinal joints.
Lateral flexion of trunk @ spinal joints.
Posterior pelvic tilt @ lumbosacral joint.
Compresses abdominal contents.

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17
Q

Clavicular head of pec major

A

O: Medial 1⁄2 of the clavicle
I: Lateral lip of bicipital groove of humerus
K: Flexes arm @ glenohumeral joint.
Adduction

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18
Q

EPB

A

O: Distal 1/3 posterior surface of radius
Interosseous membrane
I: Base of proximal phalanx of 1st digit.
K: Extends thumb @ carpometacarpal & metacarpophalangeal joints.
–Abducts thumb @ carpometacarpal joint.

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19
Q

Extensor digitorum

A

O: Lateral epicondyle of the humerus via common extensor tendon
I: Middle & distal phalanx of digits 2-5 (via dorsal digital expansion)
K: Extends digits 2-5 @ metacarpophalangeal, proximal & distal interphalangeal joints.
–Extends hand @ wrist joint

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20
Q

Rhomboid major

A

O: Spinous processes of thoracic vertebrae 2-5
I: Inferior medial border of the scapula
K: Retracts scapula @ scapulocostal joint.
–Elevates scapula @ scapulocostal joint.
–Downward rotation of scapula @ scapulocostal joint.

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21
Q

Biceps femoris

A

O: Ischial tuberosity of ischium (long head)
Linea aspera of femur (short head)
I: Head of fibula.
–Lateral condyle of tibia
K: Flexion of leg @ knee joint.
Extension of thigh @ acetabulofemoral joint.

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22
Q

Flexor digiti minimi manus

A

O: hook of hamate
Flexor retinaculum
I: Medial side of proximal phalanx of 5th digit
K: Flexes pinky @ carpometacarpal & metacarpophalangeal joints

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23
Q

Flexor digiti minimi pedis

A

O: Base of 5th metatarsal
Tendon of fibularis longus
I: Proximal phalanx of 5th toe.
K: Flexion of 5th toe @ metatarsophalangeal joint

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24
Q

ECRB

A

O: Lateral epicondyle of the humerus via common extensor tendon.
I: Base of 3rd metacarpal.
K: Extends hand @ wrist joint.
–Radial deviates hand @ wrist joint.

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25
Lats
O: Iliac crest. –Sacral crest. –Spinous processes of thoracic vertebrae 7 – lumbar vertebrae 5. –Lowest 4 ribs (9-12) via thoracolumbar fascia. –Inferior angle of the scapula. I: Floor of the bicipital groove of the humerus. K: Internally rotates arm @ glenohumeral joint. –Extends arm @ glenohumeral joint. –Adducts arm @ glenohumeral joint. Depresses scapula @ scapulocostal joint. Anterior tilt of pelvis @ lumbosacral joint.
26
Pronator teres
O: Medial epicondyle of humerus via common flexor tendon (Humeral head) Coronoid process of ulna (Ulnar head) I: Pronator tubercle of the radius. K: Pronates forearm @ radioulnar joint. –Flexes forearm @ elbow joint.
27
Rectus capitis posterior minor
O: Posterior tubercle of vertebra C1 I: Inferior nuchal line of occiput K: Extension of head @ atlanto-occipital joint
28
Sternal head pec major
O: Sternum Costal cartilages of ribs 1-7 I: Lateral lip of bicipital groove of humerus K: Adducts arm @ glenohumeral joint
29
Teres major
O: Inferior lateral border of the scapula. I: Medial lip of bicipital groove of the humerus K: Internally rotates arm @ glenohumeral joint. –Adducts arm @ glenohumeral joint. –Extends arm @ glenohumeral joint.
30
Serratus anterior
O: Ribs 1-9 I: Anterior surface of the medial border of the scapula K: Protraction of scapula @ scapulocostal joint. –Upward rotation of scapula @ scapulocostal joint.
31
Gluteus medius
O: External surface of ilium between the anterior & posterior gluteal lines I: Greater trochanter of femur (external surface) K: 1. Flexion of thigh @ acetabulofemoral joint. 2. Lateral rotation of thigh @ acetabulofemoral joint. 3. Abduction of thigh @ acetabulofemoral joint. 4. Medial rotation of thigh @ acetabulofemoral joint. 5. Extension of thigh @ acetabulofemoral joint.
32
Soleus
O: Head of fibula. –Proximal 1/3 of fibula. –Soleal line of tibia. I: Calcaneus (via Achilles tendon) K: Plantarflexion of foot @ ankle joint
33
Extensor digitorum brevis
O: Dorsal surface of calcaneus I: Lateral side of extensor digitorum longus tendons for toes 2 – 4 (via dorsal digital expansion) K: Extension of toes 2 – 4 @ metatarsophalangeal, proximal & distal interphalangeal joints
34
Anconeus
O: Lateral epicondyle of the humerus I: Lateral olecranon process of the ulna. –Proximal 1⁄4 posterior shaft of the ulna K: Extends forearm @ elbow joint
35
Middle scalene
O: Transverse processes of cervical vertebrae 2-7 I: 1st rib K: Lateral flexion of neck @ spinal joints. –Flexes neck @ spinal joints. –Elevates 1st rib (deep inhalation) @ sternocostal & costospinal joints
36
Coracobrachialis
O: Coracoid process of the scapula I: Middle medial shaft of the humerus K: Flexes arm @ glenohumeral joint. –Adducts arm @ glenohumeral joint
37
Fibularis brevis
O: Distal 1⁄2 of lateral fibula I: Tuberosity of 5th metatarsal K: Plantarflexion of foot @ ankle joint. Eversion of foot @ subtalar joint.
38
Brachioradialis
O: Proximal 2/3 lateral supracondylar ridge of the humerus I: Superior to styloid process of the radius K: Flexes forearm @ elbow joint. –Supinates forearm @ radioulnar joints (to mid position). –Pronates forearm @ radioulnar joints (to mid position).
39
Vastus Medialis
O: Medial lip of linea aspera of femur. –Intertrochanteric line of femur. –Medial supracondylar line of femur. I: Tibial tuberosity of tibia (via patellar ligament) K: Extension of leg @ knee joint
40
Pronator Quadratus
O: Distal 1⁄4 of the ulna I: Distal 1⁄4 of the radius K: Pronates forearm @ radioulnar joints
41
Extensor Hallucis Brevis
O: Dorsal surface of calcaneus I: Base of proximal phalanx of big toe K: Extension big toe @ metatarsophalangeal joint
42
Gluteus minimus
O: External surface of ilium between the anterior & inferior gluteal lines I: Greater trochanter of femur (anterior surface) K: 1. Flexion of thigh @ acetabulofemoral joint. 2. Lateral rotation of thigh @ acetabulofemoral joint. 3. Abduction of thigh @ acetabulofemoral joint. 4. Medial rotation of thigh @ acetabulofemoral joint. 5. Extension of thigh @ acetabulofemoral joint.
43
Posterior deltoid
O: Spine of the scapula I: Deltoid tuberosity of the humerus K: Extension of the arm @ glenohumeral joint External rotation of the arm @ glenohumeral joint Horizontal abduction of the arm @ glenohumeral joint
44
Adductor Hallucis
O: Base of metatarsals 2 – 4 (oblique). –Tendon of fibularis longus (oblique). –Plantar metatarsophalangeal ligaments (transverse). I: Lateral base of proximal phalanx of big toe K: Adduction of big toe @ metatarsophalangeal joint. Flexion of big toe @ metatarsophalangeal joint.
45
Flexor Digitorum Longus
O: Middle 1/3 posterior tibia I: Base of distal phalanges of toes 2 – 5 K: Flexion of toes 2 – 5 @ metatarsophalangeal, proximal & distal interphalangeal joints. Plantarflexion of foot @ ankle joint. Inversion of foot @ subtalar joint.
46
External abdominal oblique
O: Ribs 5 – 12 (lower 8 ribs). I: Anterior iliac crest of ilium. –Pubic tubercles of pubis. –Pubic crest of pubis. –Linea alba. K: 1 Flexion of trunk @ spinal joints. 2. Lateral flexion of trunk @ spinal joints. 3. Contralateral rotation of trunk @ spinal joints. 4. Posterior pelvic tilt @ lumbosacral joint. 5. Compresses abdominal contents.
47
Splenius Cervicis
O: Spinous processes of vertebrae T3 – T6 I: Transverse processes of vertebrae C1 – C3 K: Extension of neck @ spinal joints. Lateral flexion of neck @ spinal joints. Ipsilateral rotation of neck @ spinal joints.
48
Quadratus Femoris
O: Ischial tuberosity of ischium I: Quadrate tubercle of femur K: External rotation of thigh @ acetabulofemoral joint. Horizontal abduction of thigh @ acetabulofemoral joint.
49
Semitendinosus
O: Ischial tuberosity of ischium I: Pes anserine tendon (proximal anterior medial surface of tibia) K: Flexion of leg @ knee joint. Extension of thigh @ acetabulofemoral joint.
50
Biceps Brachii
O: Supraglenoid tubercle of the scapula (long head) Coracoid process of the scapula (short head) I: Radial tuberosity of the radius. –Bicipital aponeurosis. K: Flexes arm @ glenohumeral joint. –Flexes forearm @ elbow joint. –Supinates forearm @ radioulnar joint.
51
Temporalis
O: Temporal fossa of temporal bone I: Coronoid process of mandible. –Anterior border of ramus of mandible K: Elevation of mandible @ temporomandibular joint. Retraction of mandible @ temporomandibular joint.
52
Semispinalis Capitis
O: Transverse processes of vertebrae C7 – T6 Articular processes of vertebrae C4 – C6 I: Between superior & inferior nuchal lines of occiput (5 to 6 segments above) K: Extension of head & neck @ spinal joints. Lateral flexion of head & neck @ spinal joints. Contralateral rotation of head & neck @ spinal joints
53
Pec Minor
O: Ribs 3-5 I: Coracoid process of scapula K: Protraction of scapula @ scapulocostal joint. –Depression of scapula @ scapulocostal joint. –Downward rotation of scapula @ scapulocostal joint
54
Supraspinatus
O: Supraspinous fossa of the scapula I: Superior facet of greater tubercle of the humerus K: Abducts arm @ glenohumeral joint Flexes arm @ glenohumeral joint
55
Piriformis
O: Anterior surface of sacrum I: Greater trochanter of femur (superior surface) K: External rotation of thigh @ acetabulofemoral joint. Horizontal abduction of thigh @ acetabulofemoral joint.
56
Longissimus Thoracis
O: Sacrum. –Iliac crest of ilium. –Transverse processes of vertebrae L1 – L5 I: Transverse processes of vertebrae T1 – T12. –Ribs 4 – 12 (between the tubercles & angles) K: Extension of trunk @ spinal joints. Lateral flexion of trunk @ spinal joints. Ipsilateral rotation of trunk @ spinal joints
57
Flexor pollicis longus
O: Medial epicondyle of the humerus via common flexor tendon (most of the time). –Coronoid process of the ulna. Interosseous membrane. –Anterior surface of the radius. I: Base of distal phalanx of the 1st digit K: Flexes thumb @ carpometacarpal, metacarpophalangeal, proximal & distal interphalangeal joints. –Flexes hand @ wrist joint.
58
Flexor Hallucis Longus
O: Distal 2/3 posterior fibula & interosseous membrane I: Base of distal phalanx of big toe K: Flexion of big toe @ metatarsophalangeal & interphalangeal joints. Plantarflexion of foot @ ankle joint. Inversion of foot @ subtalar joint.
59
Rectus Capitis Post Major
O: Spinous process of vertebra C2 I: Lateral 1⁄2 of inferior nuchal line of occiput K: Extension of head @ atlanto-occipital joint. Lateral flexion of head @ atlanto-occipital joint. Ipsilateral rotation of head @ atlanto-axial joint
60
Gracilis
O: Anterior body of pubis Inferior ramus of pubis I: Pes anserine tendon (proximal anterior medial surface) of tibia K: Adduction of thigh @ acetabulofemoral joint. Flexion of thigh @ acetabulofemoral joint. Flexion of leg @ knee joint
61
Internal abdominal oblique
O: Iliac crest of ilium. –Inguinal ligament. –Thoracolumbar fascia I: Ribs 10 – 12 (lower 3). –Linea alba K: Flexion of trunk @ spinal joints. Lateral flexion of trunk @ spinal joints. Ipsilateral rotation of trunk @ spinal joints. Posterior pelvic tilt of trunk @ spinal joints.
62
Levator scapula
O: Transverse processes of cervical vertebrae 1-4 I: Medial border of scapula (between superior border & root of the spine of scapula) K: Elevates scapula @ scapulocostal joint. –Extends neck @ spinal joints. –Lateral flexion of neck @ spinal joints. –Ipsilateral rotation of neck @ spinal joints. –Downward rotation of scapula @ scapulocostal joint
63
Vastus intermedius
O: Anterior & lateral shaft of femur I: Tibial tuberosity of tibia (via patellar ligament) K: Extension of leg @ knee joint
64
Extensor Hallucis Longus
O: Middle 1/3 of anterior fibula Interosseous membrane I: Base of distal phalanx of big toe K: Extension of big toe @ metatarsophalangeal & interphalangeal joints. Inversion of foot @ ankle joint Dorsiflexion of foot @ ankle joint.
65
Lumbricals
O: Tendon of flexor digitorum profundus of digits 2-5 I: Lateral side of dorsal digital expansion of digits 2-5. –Lumbrical 1: into the tendon of the 2nd digit. –Lumbrical 2: into the tendon of the 3rd digit. –Lumbrical 3: into the tendon of the 4th digit. –Lumbrical 4: into the tendon of the 5th digit K: Flexes digits 2-5 @ metacarpophalangeal joints. –Extends digits 2-5 @ proximal & distal interphalangeal joints
66
Posterior scalene
O: Transverse processes of cervical vertebrae 5-7 (posterior tubercles) I: 2nd rib K: Lateral flexion of neck @ spinal joints. –Elevates 1st rib (during deep inhalation) @ sternocostal & costospinal joints
67
Vastus Lateralis
O: Gluteal tuberosity of femur. –Lateral lip of linea aspera of femur. –Intertrochanteric line of femur I: Tibial tuberosity of tibia (via patellar ligament) K: Extension of leg @ knee joint
68
Longissimus Capitis
O: Transverse processes of vertebrae T1 – T5 Articular processes of vertebrae C5 – C7 I: Mastoid process of temporal bone K: Extension of trunk @ spinal joints. Lateral flexion of trunk @ spinal joints. Ipsilateral rotation of trunk @ spinal joints
69
Flexor Digitorum Superficialis
O: Medial epicondyle of the humerus via common flexor tendon (humeroulnar head). –Coronoid process of the ulna (humeroulnar head). –Proximal 1⁄2 anterior shaft radius – anterior oblique line (radial head) I: Base of middle phalanx of digits 2-5 (medial & lateral sides – splits for FDP tendons) K: Flexes fingers 2-5 @ metacarpophalangeal & proximal interphalangeal joints. –Flexes hand @ wrist joint
70
Upper Traps
O: External occipital protuberance –Medial 1/3 of superior nuchal line of the occiput –Nuchal ligament Spinous process of C7 I: Lateral 1/3 of the clavicle –Acromion process of the scapula K: Retracts scapula @ scapulocostal joint –Elevates scapula @ scapulocostal joint –Upward rotation of scapula @ scapulocostal joint Lateral flexion of head & neck @ atlanto-occipital & spinal joints (UT). –Extends head & neck @ atlanto-occipital & spinal joints (UT). –Contralateral rotation of head & neck @ atlanto-occipital & spinal joints

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