Lab Practical 2- Origin/Insertion/Function: CAT

Question 1

External Intercostal

Answer 1

Origin: Rib

Insertion: Rib

Function: draws ribs craniad

Question 2

External oblique

Answer 2

Origin: lumbodorsal fascia and ribs

Insertion: aponeurosis on the linea alba

Function: compresses abdominal viscera

Question 3

Internal Intercostal

Answer 3

Origin: Rib

Insertion: Rib

Function: Draws ribs caudad

Question 4

Internal oblique

Answer 4

Origin: pelvis and lumbodorsal fascia

Insertion: aponeurosis on the linea alba

Function: compresses abdominal viscera

Question 5

Rectus Abdominus

Answer 5

Origin: pubic symphysis

Insertion: Sternum and costal cartilages

Function: flexes trunk and compresses internal viscera

Question 6

Tranversus Abdominus

Answer 6

Origin: ilium, lumbar vertebrae, and posterior ribs

Insertion: linea alba

Function: compresses abdominal viscera

Question 7

Clavobrachialis

Answer 7

Origin: clavicle

Insertion: proximal end of ulna

Function: draws humerus craniad

Question 8

Pectoralis Major

Answer 8

Origin: Cranial sternebrae

Insertion: proximal half of humerus

Function: adducts and rotates forelimb

Question 9

cleidomastoid

Answer 9

Origin: clavicle

Insertion: mastoid process

Function: rotates head

Question 10

digastric

Answer 10

Origin: mastoid and jugular processes of occipital

Insertion: mandible

Function: depresses lower jaw

Question 11

Geniohyoid

Answer 11

Origin: Mandible

Insertion: hyoid

Function: draws hyoid craniad

Question 12

Myohyloid

Answer 12

Origin: mandible

Insertion: median raphe

Function: elevates floor of mouth

Question 13

sternohyoid

Answer 13

Origin: manubrium of sternum

Insertion: hyoid

Function: draws hyoid craniad

Question 14

Sternomastoid

Answer 14

Origin: manubrium of sternum

Insertion: lambdoidal ridge and mastoid process

Function: rotates head

Question 15

Sternothyroid

Answer 15

Origin: manubrium of sternum

Insertion: thyroid cartilage

Function: draws larynx caudad

Question 16

Masseter

Answer 16

Origin: zygomatic arch

Insertion: mandible

Function: elevates lower jaw

Question 17

Clavotrapezius

Answer 17

Origin: Nuchal line of skull and dorsal midline of neck

Insertion: clavicle

Function: draws humerus craniad

Question 18

Temporalis

Answer 18

Origin: lambdoidal crest and zygomatic process of frontal bone

Insertion: coronoid process of mandible

Function: elevates lower jaw

Question 19

Latissimus Dorsi

Answer 19

Origin: lumbodorsal fascia and neural spines of the last thoracic and lumbar veterbrae

Insertion: medial surface of humerus

Function: elevates the arm and draws it caudad

Question 20

Levator Scapulae Ventralis

Answer 20

Origin: Occipital bone and transverse process of atlas

Insertion: metacromion process

Function: Draws scapulae craniad

Question 21

Rhomboideus

Answer 21

Origin: Neural spines of thoracic verterbrae

Insertion: Ventral border of scapulae

Function: draws scapula dorsally

Question 22

Rhomboideus Capitis

Answer 22

Origin: Superior nuchal line

Insertion: angle of scapulae

Function: draws scapulae craniad

Question 23

Spinodeltoid

Answer 23

Origin: spine of scapulae

Insertion: deltoid ridge of humerus

Function: elevates and rotates the humerus

Question 24

supraspinatus

Answer 24

Origin: supraspinous fossa

Insertion:greater tuberosity of humerus

Function: extends the humerus

Question 25

Serratus Ventralis

Answer 25

Origin: First ten ribs Insertion: ventral border of scapula Function: draws scapula ventrally craniad

Question 26

Subscapularis

Answer 26

Origin: subscapular fossa Insertion: lesser tuberosity of humerus Function: draws humerus medially

Question 27

Teres Major

Answer 27

Origin: Axillary border of scapula Insertion: medial surface of humerus Function: draws humerus medially

Question 28

Biceps Brachii

Answer 28

Origin: Border of glenoid fossa Insertion: tuberosity of radius Function: flexes forearm

Question 29

Brachialis

Answer 29

Origin: Lateral surface of humerus Insertion: below semilunar notch of ulna Function: flexes forearm

Question 30

Epitrochlearis

Answer 30

Origin: Lateral surface of latissimus dorsi Insertion: olecranon process of ulna Function: rotates ulna

Question 31

Triceps Brachii: Lateral Head

Answer 31

Origin: deltoid ridge of humerus Insertion: Olecranon process Function: extends forearm

Question 32

Triceps Brachii: Medial head

Answer 32

Origin: Axillary border of scapula Insertion: olecranon process Function: extends forearm

Question 33

Triceps Brachii: Long head

Answer 33

Origin: Humerus Insertion: olecranon process Function: extends forearm

Question 34

Acromiodeltoid

Answer 34

Origin: Acromion process of scapula Insertion: Humerus Function: flexes and rotates humerus

Question 35

Acromiotrapezius

Answer 35

Origin: Neural spines of cervical and first thoracic vertebrae Insertion: metacromion process and spine of scapula Function: draws scapula dorsally and medially

Question 36

Spinotrapezius

Answer 36

Origin: Neural spines of the thoracic vertebrae Insertion: fascia around scapula Function: draws scapula dorsally and caudad

Question 37

Infraspinatus

Answer 37

Origin: infraspinous fossa of scapula Insertion: greater tuberosity of humerus Function: rotates the humerus

Question 38

Forearm Extensors

Answer 38

Origin: Pretty much the distal portion of humerus Insertion: Metacarpals/phalanges Function: Extends manus and digits

Question 39

Forearm flexors

Answer 39

Origin: Medial epicondyle of humerus Insertion: Pretty much the digits Function: flexes the manus