Muscles- Arm Movment

Question 1

Extensor digitorum

Answer 1

Action: abduction at mints of thumb and wrist
Origin: humerus
Insertion: surface of phalanges fingers 2-5

Question 2

*extensor Capri ulnaris

Answer 2

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Action: extension and abduction at wrist
Origin: humerus, ulna
Insertion: 5th metcarpal bone

Question 3

Extensor Capri radialis brevis

Answer 3

Action: extension, abduction at the wrist
Origin: humerus
Insertion: 3rd metacarpal bone

Question 4

Extensor Capri radialis longus

Answer 4

Action: extension and abduction
Origin: humerus
Insertion: 2nd metacarpal bone

Question 5

*palmaris longus

Answer 5

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Action: flexion at wrist
Origin: humerus
Insertion: Palmer aponeurosis, flexor retinaculum

Question 6

Flexor Capri ulnaris

Answer 6

Action: flexion and abduction at the wrist
Origin: humerus, ulna
Insertion: pisiform, hamate, 5th metacarpal bone

Question 7

Flexor Capri radialis

Answer 7

Action: flexion and abduction at the wrist
Origin: humerus
Insertion:2nd and 3rd metacarpal bones

Question 8

Supinator

Answer 8

Action: supination
Origin: humerus, ulna
Insertion: radius

Question 9

Pronator teres

Answer 9

Action: pronation
Origin: humerus and ulna
Insertion: radius

Question 10

Anconeus

Answer 10

Action: extension at the elbow
Origin: epicondyle of humerus
Insertion: ulna

Question 11

Brachioradialis

Answer 11

Action: flexion at elbow
Origin: humerus
Insertion: radius

Question 12

*brachialis

Answer 12

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Action: flexion at elbow
Origin: humerus
Insertion: ulna

Question 13

*triceps brachii

Answer 13

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Action: flexion at elbow and shoulder .
Origin: coracoid process, scapula
Insertion: radius

Question 14

Latissinus dorsi

Answer 14

Action: extension, adduction, medial rotations at the shoulder
Origin: ribs 8-12, spinous process of inferior thoracic vertebrae (all lumbar vertebrae)
Insertion: humerus

Question 15

Pectoralis major

Answer 15

Action: flexion, adduction, medial rotation at the shoulder
Origin: cartilages of ribs 2-6, sternum, clavicle
Insertion: humerus

Question 16

Corabrachialis

Answer 16

Action: adduction and flexion at shoulder
Origin: coracoid process
Insertion: humerus

Question 17

Teres minor

Answer 17

Action: lateral rotation at the shoulder
Origin: lateral border of scapula
Insertion: humerus

Question 18

Teres major

Answer 18

Action: extension, adduction. Medial rotation at the shoulder
Origin: scapula
Insertion: humerus

Question 19

*subcapularis

Answer 19

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Action: medial rotation at the shoulder
Origin: scapula
Insertion: humerus

Question 20

Supraspinatus

Answer 20

Action: abduction at the shoulder
Origin: scapula
Insertion: humerus

Question 21

*deltoid

Answer 21

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Action: abduction at the shoulder, flexion and medial rotation, extension and lateral rotation
Origin: clavicle and scapula
Insertion: humerus

Question 22

*Trapezius

Answer 22

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Action: elevates and retract, depress, rotate scapula, elevate clavicle, extend rock
Origin: occipital bone, ligamentum nuchae, spinous process
Insertion: clavicle and scapula

Question 23

Sybclavius

Answer 23

Action: depresses and protracted shoulder
Origin: 1st rib
Insertion: clavicle

Question 24

Rhomboideus minor

Answer 24

Action: abducts scapula, downward rotation
Origin: spinous process
Insertion: scapula

Question 25

*rhomboideus major

Answer 25

• knew for cat
  Action: addicts scapula and performs downwards rotation
  Origin: spinous process of vertebrae of ribs (1-8) or (1-9)
  Insertion: scapula

Question 26

Pectorals minor

Answer 26

Action: depresses and protracted Shoudler, routes scapula
Origin: ribs (3-5)
Insertions: scapula

Question 27

*levator scauplae

Answer 27

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Action: elevates scapula
Origin: first four cervical vertebrae
Insertion: scapula

Question 28

*rectus abdominus

Answer 28

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Action: depresses ribs, flexes vertebral column, compresses abdomen
Origin: pubis
Insertion: costal cartilages (ribs 5-7) xiphoid process

Question 29

Diaphragm

Answer 29

Action: contraction, expands thoracic cavity, compresses abdominopelvic cavity
Origin: xiphoid process, cartilage of ribs (4-10)
Insertion: central tendinous sheet

Question 30

Transversus abdominis

Answer 30

Action: compress abdomen
Origin: cartilages of ribs (6-12), iliac crest, thoracolumnbar fascia
Insertion: linea alba and pubis

Question 31

*internal abdominal oblique

Answer 31

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  Action: ,compresses abdomen, depresses ribs, flexes or bends spine
  Origin: thoracolumbar fascia and iliac crest
  Insertion: inferior ribs, xiphoid process, linea alba

Question 32

*external abdominal oblique

Answer 32

Action: compresses abdomen, depresses ribs. Flexes or bends spine
Origin: ribs (5-12)
Insertion: linea alba and iliac crest

Question 33

*internal intercostals

Answer 33

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  Action: depresses ribs
  Origin: ribs
  Insertion: proceeding rib

Question 34

*external intercostals

Answer 34

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Action: elevate ribs
Origin: inferior border of each rib
Insertion: superior border of more inferior rib

Question 35

Splenus capitus

Answer 35

Action: extend neck, rotates neck, laterally flexes neck to that side
Origin: spinous process
Insertion: mastoid process, occipital bone of skull, cervical vertebrae

Question 36

Intrinsic muscles of the hand

Answer 36

Action: fine motor skills
Origin: many
Insertion: many

Question 37

Extensor digiti minimi

Answer 37

Action: extension at joints of the little finger
Origin: tendon lateral to epicondyle of humerus
Insertion: surface of proximal phalanx of little finger