Muscle OIAN

Question 1

Buccinator

Answer 1

O: Maxilla and mandible
I: Commissure of mouth
A: Retract the commissure of the mouth and flatten cheeks
N: Facial n.

Question 2

Masseter

Answer 2

O: Facial crest and zygomatic arch
I: Ramus of mandible
A: Close mouth
N: Trigeminal (Mandibular) n.

Question 3

Occipitomandibularis

Answer 3

O: Jugular process of occipital bone
I: Caudal border of mandible
A: Open mouth
N: Facial n.

Question 4

Criocoarytenoideus dorsalis

Answer 4

O: Lamina of cricoid cartilage
I: Arytenoid cartilage (muscular process)
A: Open glottis
N: Recurrent laryngeal n.

Question 5

Cricoarytenoideus lateralis

Answer 5

O: Arch of cricoid cartilage
I: Arytenoid cartilage (muscular process)
A: close glottis
N: Recurrent laryngeal n.

Question 6

Supraspinatus

Answer 6

O: Supraspinous fossa and spine of scapula
I: Greater and lesser tubercle of humerus
A: Extend shoulder, cranial soulder stabilizer
N: Suprascapular n.

Question 7

Infraspinatus

Answer 7

O: Infraspinous fossa
I: Greater tubercle of humerus
A: Abduct arm
N: Suprascapular n.

Question 8

Deltoideus

Answer 8

O: Spine of scapula and aponeurosis over infraspinatus muscle
I: Deltoid tuberosity
A: Flex shoulder and abduct arm
N: Axillary n

Question 9

Subscapularis

Answer 9

O: Subscapular fossa
I: Lesser tubercle of humerus
A: Adduct humerus, medial shoulder stabilizer
N: Subscapular and axillary n

Question 10

Biceps brachii

Answer 10

O: Supraglenoid tubercle
I: Radial tuberosity, tendon of extensor carpi radialis via lacertus fibrosis
A: Flex elbow, extend the shoulder and carpus
N: Musculocutaneous n

Question 11

Triceps brachii

Answer 11

O: Long- Caudal border of scapula, Lateral- lateral surface of humerus, medial surface of humerus
I: Olecranon
A: Extend elbow (long- also flex shoulder)
N: Radial n.

Question 12

Extensor carpi radialis

Answer 12

O: Lateral epicondyle of humerus
I: Metacarpal tuberosity MC3
A: Extend carpus, flex elbow
N: Radial n

Question 13

Ulnaris lateralis

Answer 13

O: Lateral epicondyle of humerus
I: Accessory carpal bone C4 and MC4
A: Flex carpus and extend elbow
N: Radial n

Question 14

Common digital extensor

Answer 14

O: Lateral epicondyle of humerus, lateral tuberosity of radius, lateral surface of body of ulna
I: Extensor process of P3
A: Extend digit and carpus, flex elbow
N: Radial n

Question 15

Flexor carpi radialis

Answer 15

O: Medial epicondyle of humerus
I: Second metacarpal bone
A: Flex carpus and extend elbow
N: Median n

Question 16

Superficial digital flexor

Answer 16

O: Medial epicondyle of humerus and caudal surface of radius
I: Proximal part of P2 and distal part of P3
A: Flex digit and carpus, extend elbow
N: Ulnar n

Question 17

Deep digital flexor

Answer 17

O: Medial epicondyle of humerus, olecranon, caudal surface of radius
I: Flexor surface of P3
A: Flex digit and carpus, extend elbow
N: Median and ulnar n

Question 18

Interosseus

Answer 18

O: Palmar surface of metacarpal 3, distal row of carpal bones
I: Abaxial surfaces of proximal sesmoids and tendon of common digital extensor
A: Support fetlock (prevent overtextension)
N: Palmar metacarpal n

Question 19

Levator labii

Answer 19

O: Zygomatic, lacrimal, and superioris maxillary bones
I: Upper lip
A: Raise upper lip
N: Facial n.