Muscles Cat Dissection Origins/insertions/function 1

Front 1

Tensor Fasciae Latae Origin

Back 1

Ventral border of the ilium, into the fascia of surrounding hip muscles

Front 2

Tensor Fasciae Latae Insertion

Back 2

Into fascia lata (extends distally to cover parts of the vastus lateralis and vastus medialis, and then inserts on surface of the patella)

Front 3

Tensor Fasciae Latae Function

Back 3

Tightens fascia lata, helps extend the shank

Front 4

Caudofemoralis Origin

Back 4

From the transverse processes of 2nd and 3rd caudal vertebrae

Front 5

Caudofemoralis Insertion

Back 5

Into a thin tendon along the lateral border of the patella

Front 6

Caudofemoralis Function

Back 6

Abducts the thigh, extends the shank

Front 7

Gluteus Maximus Origin

Back 7

From the transverse processes of the last sacral and first caudal vertebrae + adjacent fascia

Front 8

Gluteus Maximus Insertion

Back 8

Onto the surface of the greater trochanter of the femur

Front 9

Gluteus Maximus Function

Back 9

Abducts the thigh

Front 10

Gluteus Medius Origin

Back 10

From the crest/lateral border of the ilium; from the transverse processes of the last sacral, and first caudal vertebra+ adjacent fascia

Front 11

Gluteus Medius Insertion

Back 11

Onto the proximal end of the greater trochanter of the femur

Front 12

Gluteus Medius Function

Back 12

Abducts the thigh

Front 13

Masseter Origin

Back 13

From the zygomatic arch

Front 14

Masseter Insertion

Back 14

Into the masseteric fossa and adjacent regions of the mandible

Front 15

Masseter Function

Back 15

elevates the mandible

Front 16

Temporalis Origin

Back 16

Mostly from the temporal bone, a few from the zygomatic arch

Front 17

Temporalis Insertion

Back 17

Coronoid process of the mandible

Front 18

Temporalis Function

Back 18

Elevates the mandible

Front 19

Sternomastoid Origin

Back 19

Cranial end of the manubrium

Front 20

Sternomastoid Insertion

Back 20

Lambdoidal ridge, and mastoid region of the temporal bone

Front 21

Sternomastoid Function

Back 21

Individually: turns the head
Together: Flexes the head

Front 22

Cleidomastoid Origin

Back 22

From the mastoid process of the zygomatic bone

Front 23

Cleidomastoid Insertion

Back 23

Clavicle

Front 24

Cleidomastoid Function

Back 24

Clavicle stationary: turns the head
Head stationary: moves clavicle anteriorly

Front 25

Splenius Origin

Back 25

Middorsal line of the neck and adjacent fascia

Front 26

Splenius Insertion

Back 26

Lambdoidal ridge of the occipital bone

Front 27

Splenius Function

Back 27

Alone: Flexes head laterally
Together: Extends the head

Front 28

Clavotrapezius Origin

Back 28

From the lambdoidal ridge and middorsal raphe over the spine of the axis

Front 29

Clavotrapezius Insertion

Back 29

Into the clavicle and the raphe between the clavotrapezius and clavobrachialis

Front 30

Clavotrapezius Function

Back 30

Protracts the humerus

Front 31

Acromiotrapezius Origin

Back 31

Middorsal line from spine of axis to spine of fourth thoracic vertebrae

Front 32

Acromiotrapezius Insertion

Back 32

metacromion process and spine of scapula

Front 33

Acromiotrapezius Function

Back 33

Adducts the scapula and stabilizes its position

Front 34

Spinotrapecius Origin

Back 34

From the spinous process of most thoracic vertebrae

Front 35

Spinotrapecius Insertion

Back 35

Fascia of supraspinitus and infraspinitus muscles on either side of spine

Front 36

Spinotrapecius Function

Back 36

Pulls scapulae dorsally and caudally

Front 37

Latissimus Dorsi Origins

Back 37

Neutral spines of the 4th and 5th thoracic vertebrae to the 6th lumbar vertebrae

Front 38

Latissimus Dorsi Insertion

Back 38

Onto the medial surface of the shaft of the humerus at the proximal end

Front 39

Latissimus Dorsi Function

Back 39

Pulls forelimb dorsocaudally

Front 40

Rhomboideus Origin

Back 40

From the caudal part of the cervical supraspinous ligament, and vertebral spines of the first 4 thoracic vertebrae

Front 41

Rhomboideus Insertion

Back 41

vertebral border and outer surface of scapula

Front 42

Rhomboideus Function

Back 42

adducts scapulae

Front 43

Occipitoscapularis Origin

Back 43

mediolateral half of the lambdoidal ridge

Front 44

Occipitoscapularis Insertion

Back 44

Dorsal border of scapula

Front 45

Occipitoscapularis Function

Back 45

Rotates and pulls scapula cranially