Muscle review: mastication, cervical region, shoulder girdle

Question 1

Temporalis muscle: origin/insertion

Answer 1

Temporal fossa of the parietal bone to the coronoid process of mandible

Question 2

Temporalis: function

Answer 2

Close jaws

Question 3

Temporalis: innervation

Answer 3

Mandibular nerve (V3) (Mandibular branch of Trigeminal)

Question 4

Masseter: origin/insertion

Answer 4

Zygomatic arch to the masseter fossa of the mandible

Question 5

Masseter: function

Answer 5

Close jaws

Question 6

Masseter: innervation

Answer 6

Mandibular nerve (V3) (Mandibular branch of Trigeminal)

Question 7

Digastricus: origin/insertion

Answer 7

Paracondylar process to the caudal aspect of angular process

Question 8

Digastricus: function

Answer 8

Open mouth

Question 9

Digastricus: innervation

Answer 9

Mandibular nerve (V3) (Mandibular branch of Trigeminal)

Question 10

Splenius: origin/insertion

Answer 10

Median Raphe T1/2 to C1 and fascia of occipital ridge

Question 11

Splenius: function

Answer 11

Raise head

Question 12

Splenius: innervation

Answer 12

Segmental spinal nerves

Question 13

Scalenus: origin/insertion

Answer 13

Scalloped muscles from ventral surfaces of cervical vertebrae to ribs of T6-9

Question 14

Scalenus: function

Answer 14

Ventrolateral flexion/inspiration

Question 15

Scalenus: innervation

Answer 15

Segmental spinal nerves

Question 16

Sterno-thyro-hyoideus: origin/insertion

Answer 16

Manubrium to cranial hyoids and tongue

Question 17

Sterno-thyro-hyoideus: function

Answer 17

Retract hyoids/ventral flexion of neck

Question 18

Sterno-thyro-hyoideus: innervation

Answer 18

Segmental spinal nerves

Question 19

Sternocephalicus: origin/insertion

Answer 19

Manubrium to skull and angular process

Question 20

Sternocephalicus: function

Answer 20

Ventral/ventrolateral flexion of neck

Question 21

Sternocephalicus: innervation

Answer 21

Accessory nerve (11)

Question 22

Omotransversarius: origin/insertion

Answer 22

Transverse process of C1 to acromion

Question 23

Omotransversarius: function

Answer 23

Bring shoulder blade forward/lateral neck flexion

Question 24

Omotransversarius: innervation

Answer 24

Accessory nerve (11)

Question 25

Brachiocephalicus: origin/insertion

Answer 25

Median raphe of occiput/atlas to distal medial humerus

Question 26

Brachiocephalicus: function

Answer 26

Advance limb/extend shoulder joint/lateral neck flexion

Question 27

Brachiocephalicus: innervation

Answer 27

Accessory nerve (11)

Question 28

Trapezius: origin/insertion

Answer 28

C3-T9 median raphe to lateral spine of scapula and acromion

Question 29

Trapezius: function

Answer 29

Elevate and abduct forelimb/elevate scapula dorsal and medial

Question 30

Trapezius: innervation

Answer 30

Accessory nerve (11)

Question 31

Rhomboideus: origin/insertion

Answer 31

C5-T8 median raphe to medial aspect of scapula

Question 32

Rhomboideus: function

Answer 32

Dorsal medial elevation of scapula

Question 33

Rhomboideus: innervation

Answer 33

Segmental spinal nerves

Question 34

Serratus ventralis: origin/insertion

Answer 34

Transverse processes of C3 caudal and 9-10 ribs to dorsomedial aspect of scapula (deep to subscapularis)

Question 35

Serratus ventralis: function

Answer 35

Support trunk "sling"

Question 36

Serratus ventralis: innervation

Answer 36

Long thoracic nerve

Question 37

Superficial pectorals (cranial): origin/insertion

Answer 37

Cranial sternum to lateral proximal humerus

Question 38

Superficial pectorals (cranial): function

Answer 38

Adduct limb/prevent abduction

Question 39

Superficial pectorals (cranial): innervation

Answer 39

Cranial pectoral nerve

Question 40

Deep pectorals (caudal): origin/insertion

Answer 40

Caudal sternum to lateral proximal humerus

Question 41

Deep pectorals (caudal): function

Answer 41

Flexes shoulder joint/draws trunk forward/draws limb caudal

Question 42

Deep pectorals (caudal): innervation

Answer 42

Caudal pectoral nerve

Question 43

Latissiumus dorsi: origin/insertion

Answer 43

T5-L4 median raphe to proximal medial humerus

Question 44

Latissiumus dorsi: function

Answer 44

Flex shoulder joint

Question 45

Latissiumus dorsi: innervation

Answer 45

Thoracodorsal nerve

Question 46

Cutaneous trunci\*\*: origin/insertion

Answer 46

Under the skin

Question 47

Cutaneous trunci\*\*: function

Answer 47

Skin twitching/sensory

Question 48

Cutaneous trunci\*\*: innervation

Answer 48

Lateral thoracic nerve